M Series Data Sheet
50 Watt DC-DC and AC-DC Converters
Features
• Extremly wide operating input voltage ranges from 8 to
385 VDC and 85 to 264 VAC, 47 to 440 Hz
• RoHS lead-free-solder and lead-solder-exempted
products available
• 5 year warranty for RoHS compliant products with an
extended temperature range
• Class I equipment
• Input over- and undervoltage lockout
• 1, 2, or 3 individually isolated outputs up to 72 V
• Outputs: SELV, no load, overload, short-circuit proof,
rectangular current limiting characteristic
• Adjustable output voltages with remote on/off
• Immunity according to IEC/EN 61000-4-2, -3, -4, -5, -6
• Emissions according to EN 55011/55022
• According to EN 45545 and NF-F-16 (Version V107 or
later)
111
4.37"
3U
39
1.54"
8 TE
• All PCBs boards coated by protective lacquer
• Very high reliability
168
6.6"
• Battery charger models available
Safety-approved to the latest edition of IEC/EN 60950-1
and UL/CSA 60950-1
Description
The M Series of DC-DC and AC-DC converters represents a
broad and flexible range of power supplies for use in advanced
industrial electronic systems. Features include high efficiency,
reliability, low output voltage noise and excellent dynamic
response to load/line changes due to individual regulation of
each output.
The converter inputs are protected against surges and
transients occurring at the source lines. An input over- and
undervoltage lockout circuit disables the outputs, if the input
voltage is outside the specified range. An inrush current
limitation prevents circuit breakers and fuses from tripping at
switch-on.
All outputs are open- and short-circuit proof, and are protected
against overvoltages by means of built-in suppressor diodes.
The outputs can be inhibited by a logic signal applied to the
connector (pin 2). If the inhibit function is not used, pin 2 should
be connected to pin 23 to enable the outputs.
LED indicators display the status of the converter and allow
visual monitoring of the system at any time.
Table of Contents
Full input to output, input to case, output to case, and output to
output isolation is provided.
The case design allows operation at nominal load up to 71 °C
in a free-air ambient temperature. If forced cooling is provided,
the ambient temperature may exceed 71 °C but the case
temperature should remain below 95 °C under all conditions.
A temperature sensor generates an inhibit signal, which
disables the outputs, when the case temperature TC exceeds
the limit. The outputs automatically recover, when the
temperature drops below the limit.
Various options are available to adapt the converters to
individual applications.
The converters may either be plugged into a 19" rack system
according to IEC 60927-3 or be mounted onto a chassis or a
plate.
Page
Description ............................................................................. 1
Model Selection ..................................................................... 2
Functional Description ........................................................... 5
Electrical Input Data ............................................................... 6
Electrical Output Data ............................................................ 8
Auxiliary Functions ............................................................... 11
Page
Electromagnetic Compatibility (EMC) .................................. 14
Immunity to Environmental Conditions ................................ 16
Mechanical Data .................................................................. 17
Safety and Installation Instructions ...................................... 18
Description of Options ......................................................... 20
Accessories .......................................................................... 26
Copyright © 2018, Bel Power Solutions Inc. All rights reserved.
BCD20018-G Rev AE1, 16-Apr-2018
MELCHER
The Power Partners.
Page 1 of 26
M Series Data Sheet
50 Watt DC-DC and AC-DC Converters
Model Selection
Non-standard input / output configurations or special custom
adaptions are available on request. Table 1 provides an
overview of the basic input and output configurations. More
than 1000 different model types have been manufactured
with different input /output configurations and customized
specialties. Please consult the company for additional model
types!
Table 1a: Standard models AM, BM, FM
Output 1
Output 2
Output 3
Vo nom Io nom
[VDC] [A]
Vo nom Io nom
[VDC] [A]
V nom Io nom
[VDC] [A]
Operating input voltage range and efficiency
Options
Vi min – Vi max
8 – 35 VDC
η min1
[%]
Vi min – Vi max
14 – 70 VDC
η min1
[%]
Vi min – Vi max
20 – 100 VDC
η min1
[%]
5.1
12
15
24
48
8.0
4.0
3.4
2.0
1.0
-
-
-
-
AM1001-9RG
AM1301-9RG
AM1501-9RG
AM1601-9RG
AM1901-9RG
72
79
79
81
81
BM1001-9RG
BM1301-9RG
BM1501-9RG
BM1601-9RG
BM1901-9RG
74
80
81
83
83
FM1001-9RG
FM1301-9RG
FM1501-9RG
FM1601-9RG
FM1901-9RG
74
80
81
82
83
-7, P
D0 – D9,
V0 – V3 3
F, A, K, H
non-G
5.1
5.1
12
15
24
4.0
4.0
2.0
1.7
1.0
5.1
24
12
15
24
4.0
1.0
2.0
1.7
1.0
-
-
AM2001-9G
AM2060-9G
AM2320-9G
AM2540-9G
AM2660-9G
77
78
-
BM2001-9G
BM2060-9G
BM2320-9G
BM2540-9G
BM2660-9G
79
80
-
FM2320-9G
FM2540-9G
--
80
79
-7, P
D0 – D9
A, K, H
non-G
5.1
5.1
5.1
5.0
5.0
5.0
12
15
24
0.7
0.6
0.35
12
15
24
0.7
0.6
0.35
AM3020-9G
AM3040-9G
AM3060-9G
75
75
-
BM3020-9G
BM3040-9G
BM3060-9G
76
76
-
FM3020-9G
FM3040-9G
-
76
76
-
-7, P
D0 – D9, A
K, H, non-G
Table 1b: Standard models CM, DM, LM
Output 1
Vo nom Io nom
[VDC] [A]
Output 2
Output 3
Vo nom Io nom
[VDC] [A]
V nom Io nom
[VDC] [A]
Operating input voltage range and efficiency
Vi min – Vi max
28 – 140 VDC
η min1
[%]
Vi min – Vi max
44 – 220 VDC
η min1
[%]
Vi min – Vi max
88 – 372 VDC
85 – 264 VAC 2
η min1
[%]
74
81
82
LM1001-9RG
LM1301-9RG
LM1501-9RG
LM1601-9RG
LM1901-9RG
74
80
79
82
82
-7, E 4, P
D0 – D9
V0 – V3 3
A, K, H
non-G
LM2001-9G
LM2060-9G
LM2320-9G
LM2540-9G
LM2660-9G
80
79
-7, E 4, P
D0 – D9
A, K, H
non-G
LM3020-9G
LM3040-9G
LM3060-9G
74
73
-
-7, E 4, P
D0 – D9, A
K, H, non-G
5.1
12
15
24
48
8.0
4.0
3.4
2.0
1.0
-
-
-
-
CM1001-9RG
CM1301-9RG
CM1501-9RG
CM1601-9RG
CM1901-9RG
74
80
82
82
82
DM1001-9RG
DM1301-9RG
DM1501-9RG
DM1601-9RG
DM1901-9R
5.1
5.1
12
15
24
4.0
4.0
2.0
1.7
1.0
5.1
24
12
15
24
4.0
1.0
2.0
1.7
1.0
-
-
CM2001-9G
CM2060-9G
CM2320-9G
CM2540-9G
CM2660-9G
79
80
-
DM2001-9G
DM2060-9G
DM2320-9G
DM2540-9G
DM2660-9G
5.1
5.1
5.1
5.0
5.0
5.0
12
15
24
0.7
0.6
0.35
12
15
24
0.7
0.6
0.35
CM3020-9G
CM3040-9G
CM3060-9G
76
76
76
DM3020-9G
DM3040-9G
DM3060-9G
1
2
3
4
Options
83
80
80
77
76
76
Min. efficiency at Vi nom and I o nom. Typ. values are approx. 2% better.
Operating frequency range: 47 – 440 Hz; see Safety and Installation Instructions for > 60 Hz !
Option V0, V2, V3 available only for output 1 = 5.1 V (excludes option D)
Option E only available for CM and LM models (not for DM)
NFND: Not for new designs.
BCD20018-G Rev AE1, 16-Apr-2018
Preferred for new designs
MELCHER
The Power Partners.
Page 2 of 26
M Series Data Sheet
50 Watt DC-DC and AC-DC Converters
Table 1c: EM and battery charger models
Output 1
3
4
Output 2
Vo Bat Io nom
[VDC]
[A]
Vo safe
[VDC]
Vo max
[VDC]
Same Vo nom
and I o nom as
DM models
-
-
12.84
25.68
38.52
51.36
64.2
14.15 – 14.6
28.3 – 29.15
42.45 – 43.72
56.6 – 58.3
70.75 – 72.87
12
24
36
48
60
1
2
3
4
3.6
1.8
1.2
0.9
0.72
Vo nom
[VDC]
Output 3
Io nom
[A]
Vo nom
[VDC]
Operating input voltage range and efficiency
Io nom
[A]
Vi min – Vi max η min
67 – 385 VDC [%]
EM1xxx-9RG
same as DM models
EM2xxx-9RG
same as DM models same as DM models EM3xxx-9RG
-
-
-
-
-
1
Vi min – Vi max η min
88 – 372 VDC [%]
85 – 264 VAC 2
Options
1
-
-
-
-7, E, D, A
non-G
-
LM1781-9RD5G
LM1782-9RD5G
LM1783-9RD5G
LM1784-9RD5G
LM1785-9RD5G
79
81
82
81
81
-7, E, A
non-G
Min. efficiency at Vi nom and I o nom. Typ. values are approx. 2% better.
Operating frequency range: 47 – 440 Hz; see Safety and Installation Instructions for > 60 Hz
V o nom for EM models
Setting voltage with open R-input (battery chargers)
NFND: Not for new designs.
BCD20018-G Rev AE1, 16-Apr-2018
Preferred for new designs
MELCHER
The Power Partners.
Page 3 of 26
M Series Data Sheet
50 Watt DC-DC and AC-DC Converters
Part Number Description
C M 2 5 40 -9 E P D3 A H G
Operating input range Vi :
8 – 35 VDC
14 – 70 VDC
20 – 100 VDC
28 – 140 VDC
44 – 220 VDC
67 – 385 VDC
85 – 264 VAC, 88 – 372 VDC
................... A
................... B
................... F
................... C
................... D
................... E
................... L
Series ................................................................................... M
Number of outputs 4 ......................................................................... 1, 2, 3 4
Output 1, Vo1 nom :
5.1 V
12 V
15 V
24 V
other voltages
48 V
............ 0, 1, 2
.................... 3
................ 4, 5
.................... 6
................ 7, 8
.................... 9
Single-output models (different specs.) ...................... 01 – 99
5.1 V ....................... 01 – 19
Outputs 2, 3: Vo2 nom, Vo3 nom:
12 V ........................ 20 – 39
15 V ........................ 40 – 59
24 V ........................ 60 – 69
other voltages and specs. ............ 21 – 99
Ambient temperature range TA: –25 to 71 °C .................. -7
– 40 to 71 °C .................. -9
customer-specific ... -0, -5, -6, -8
Auxiliary functions and options:
Inrush current limitation (CM, EM, LM) ........................ E
Output voltage control input (single-output models) .... R 2
Potentiometers for adjustment of output voltages ....... P 2
Save data signal (D0 – D9, to be specified) ................ D 1
ACFAIL signal (V0, V2, V3, to be specified) ................ V 1
Output voltage test sockets .......................................... A
Increased electric strength test voltage ....................... H
Input fuse built-in (not accessible) ............................... F 3
Coding strip at the connector ....................................... K
RoHS-compliant for all 6 substances ........................... G
1
2
3
4
Option D excludes option V and vice versa
Feature R is fitted to single-output models only. Option P excludes option R (and vice versa).
Only for FM1000
Models with 220 mm case length. Just add 6000 to the standard model number, e.g., DM3020-9AG → DM9020-9AG.
Note: The sequence of options must follow the order above. This
part number description is descriptive only; it is not inteded for
creating part numbers.
NFND: Not for new designs
Preferred for new designs.
Example: CM2540-9EPD3AHG:
DC-DC converter, operating input voltage range
28 – 140 VDC, providing output 1 with 15 V/1.7 A and
output 2 with 15 V /1.7 A; temperature range –40 to
+71 °C, inrush current limitation, equipped with
potentiometers, undervoltage monitor D3, test
sockets, tested with higher voltage output to case,
RoHS-compliant for all 6 substances.
BCD20018-G Rev AE1, 16-Apr-2018
MELCHER
The Power Partners.
Page 4 of 26
M Series Data Sheet
50 Watt DC-DC and AC-DC Converters
Functional Description
The input voltage is fed via an input fuse, an input filter, a bridge
rectifier, and an inrush current limiter to the input capacitor.
This capacitor sources a single-transistor forward converter.
Each output is powered by a separate secondary winding of the
main transformer. The resultant voltages are rectified and their
ripple smoothed by a power choke and an output filter. The
main control circuit senses the main output voltage Vo1 and
generates, with respect to the maximum admissible output
currents, the control signal for the primary switching transistor.
This signal is transferred to the primary side by a coupling
transformer.
The auxiliary output voltages Vo2 and Vo3 are individually
regulated by means of secondary switching transistors. Each
auxiliary output's current is sensed using a current transformer.
If one of the outputs is driven into current limit, the other outputs
will reduce their output voltages as well, because all output
currents are controlled by the same main control circuit.
03009a
Option P
Main control circuit
CY
5
Vi+
29
L
5
Vi–
Input filter
Fuse
1
2
3
32
Forward converter
approx. 70 kHz
N
Output 1
filter
2
i
5
D, V
14
R4
17
G4
20
23
CZ
Control
circuit
output 2
14
Output 2
filter
17
CZ
5
Control
circuit
output 3
Output 3
filter
8
11
26
CY
1
2
3
4
5
Transient suppressor diode in AM, BM, CM, FM models.
Bridge rectifier in LM, series diode in EM models.
Inrush current limiter (NTC) in CM, DM, EM, LM models (option E: refer to the description of option E).
Single-output models with feature R.
LM-models
Fig. 1
Block diagram, triple-output models
BCD20018-G Rev AE1, 16-Apr-2018
MELCHER
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Page 5 of 26
M Series Data Sheet
50 Watt DC-DC and AC-DC Converters
Electrical Input Data
General conditions:
– TA = 25 °C, unless TC is specified.
– Connector pins 2 and 23 interconnected, R input not connected; with option P: Vo = Vo nom
Table 2a: Input data
Input
AM
Characteristics
Vi
Conditions
min
typ
max
min
35
14
FM
typ
max
min
70
20
CM
typ max
min
max
154 7
Vi nom
Ii
Input current
Pi 0
No-load input power:
V i nom
– single-output models I o1,2,3 = 0
– double-output models
– triple-output models
1
7
6
1.5
9
9
1
7
6
1.5
9
9
1
7
6
1.5
9
9
1
7
6
1.5
9
9
Idle input power
inhibited, Vi nom
1
1.5
1
1.5
1
1.5
1
1.5
Peak inrush current
Vi = Vi max
RS = 0 Ω 3
TC = 25 °C
Iinr p
6
tinr r
Rise time
tinr h
Time to half-value
Ri
Input resistance
Ci
Input capacitance
V i abs
Input voltage limits
without any damage
Vi nom, Io nom 2
TC = 25 °C
100
typ
Unit
Operating input voltage Io = 0 – Io nom
TC min – TC max
Nominal input voltage
Pi inh
8
BM
28
15
30
50
60
4.0
2.0
1.2
1.0
400
500
60
50
40
60
170
100
60
280
87.5
140
A
W
170 4
400
A
µs
824 4
250
VDC
mΩ
2600
4000
670
1100
370
600
370
600
µF
0
40
0
80
0
120
0
160
VDC
Table 2b: Input data
Input
DM
Characteristics
Conditions
Vi
Io = 0 – Io nom
TC min – TC max
Operating input voltage
min
typ
EM
max
min
44
Vi nom Nominal input voltage
Vi nom, Io nom 2
typ
LM
max
220
67
min
typ
85
385
88
110
220
310
0.55
0.275
0.20
Unit
max
264
VAC 1
372
VDC
Ii
Input current
Pi 0
No-load input power:
Vi nom
– single-output models Io1,2,3 = 0
– double-output models
– triple-output models
1
7
6
1.5
9
9
1
7
6
1.5
9
9
1
7
6
1.5
9
9
Idle input power
1
1.5
1
1.5
1
1.5
Pi inh
Iinr p
6
Peak inrush current
t inr r
Rise time
t inr h
Time to half-value
Ri
Input resistance
Ci
Input capacitance
Vi abs
1
2
3
4
5
6
7
inhibited, Vi nom
110 4
Vi = Vi max
RS = 0 Ω 3
TC = 25 °C
TC = 25 °C
Input voltage limits
without any damage
160 4
40
40
300
240
900
2400 4
W
60 4
250
2000 4
A
A
µs
6200 4
140
270
140
270
140
0
400 5
– 400
400
–
–
–
–
mΩ
270
µF
– 400
400
VDC
0
284
VAC
In AC powered mode (LM models): Nominal input voltage range: 100 – 240 VAC, operating input frequency range: 47 – 440 Hz
With multiple-output models, the same condition for each output applies.
RS = source resistance.
Value for initial switch-on cycle.
1 s max., duty cycle 1% max.
I inr p = V i / (Rs + Ri); see Inrush Current.
140 V continuously. CM models with version V106 or greater (or with suffix /131) withstand 154 V for 2 s.
BCD20018-G Rev AE1, 16-Apr-2018
MELCHER
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Page 6 of 26
M Series Data Sheet
50 Watt DC-DC and AC-DC Converters
Input Fuse
Input Under-/Overvoltage Lockout
A fuse holder containing a slow-blow type fuse (size: 5 × 20
mm) is mounted in the back plate of the converter. The fuse
protects the converter against severe defects. It may not fully
protect it at input voltages exceeding 200 VDC. In applications,
where the converters operate at DC source voltages above 200
VDC, an external fuse or a circuit breaker at system level
should be installed.
If the input voltage remains below 0.8 Vi min or exceeds approx.
1.1 Vi max, an internally generated inhibit signal disables the
output(s). When checking this function the absolute maximum
input voltage rating Vi abs must be carefully considered (see
table Input data).
The fuse and a VDR form together with the input filter an
effective protection against high input transients.
Note: For applications, where the fuse should not be accessible;
see Option F.
Table 3: Fuse types (slow-blow)
Series
Schurter type
Part number
AM1000 – 3000
SPT 10 A /250 V
0001.2514
BM1000 – 3000
SPT 8 A /250 V
0001.2513
FM1000 – 3000
SPT 5 A /250 V
0001.2511
CM1000 – 3000
SPT 3.15 A /250 V
0001.2509
DM1000 – 3000
EM1000 – 3000
LM1000 – 3000
SPT 2.5 A /250 V
0001.2508
Note: When Vi is between Vi min and the undervoltage lockout level,
the output voltage may be below the value defined in table Output
data.
Reverse Polarity
Reverse polarity at the input of AM, BM, CM, DM, and FM
models will cause the fuse to blow. In EM and LM models a
series diode will protect the converter. A series diode is not
incorporated in AM, BM, CM, DM and FM types to avoid
unwanted power losses.
Inrush Current
The CM, DM, EM, and LM (excluding FM) models incorporate
an NTC resistor in the input line, which (during the initial switchon cycle) limits the peak inrush current in order to prevent the
connectors and external switching devices from damage.
Subsequent switch-on cycles within a short interval will cause
an increase of the peak inrush current due to the warming-up of
the NTC resistor. Refer to Option E (only available for CM, EM,
and LM.
Ii [A]
04014a
10
Ii [A]
04015a
LM A-EM
AM
80
400
70
350
60
300
50
250
40
200
BM
AM
BM
1.0
FM
CM
FM
LM
DM
EM
LM
0.1
1
2
3
4
5
6
Vi DC
________
Vi min DC
30
150
20
100
10
50
EM
DM
CM
t [ms]
0
Fig. 2
Typical input current versus relative input voltage at
nominal output load
0
0.2
0.5
0.4
1.0
0.6
1.5
0.8
2.0
1.0
2.5
1.2
3.0
1.4
3.5
1.6 A-EM
4.0 LM
Fig. 3
Typical inrush current at initial switch-on. Vi max (DC) and
nominal output load
BCD20018-G Rev AE1, 16-Apr-2018
MELCHER
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Page 7 of 26
M Series Data Sheet
50 Watt DC-DC and AC-DC Converters
Electrical Output Data
General conditions
– TA = 25°C, unless TC is specified.
– Connector pins 2 and 23 interconnected, R input not connected; with option P: Vo = Vo nom
Table 4: Output data
Output
Vo nom
5.1 V
12 V
15 V
24 V
Characteristics
Conditions
min typ max min typ max min typ max
Vo
Output voltage
Vi nom, I o nom 1
5.07
Vo p
Output overvoltage
protection 5
Io nom
Output current
Io L
Output current
limitation
vo
Output
voltage
noise
5.13 11.93
7.5
Vi min – Vi max
TC min – TC max
Switch. freq. V i nom, I o nom 1
IEC/EN 61204
Total
BW = 20 MHz
30
25
50
35
70
40
80
120
40
80
40
80
40
80
Static load regulation
Vi nom
Io nom – 0 2
6
Vi nom
Io nom – 0 3
0
td c
α Vo
1
2
3
4
5
48.28
V
85
60
∆Vo I
vo d c
41
15
Vi min – Vi nom
Vi nom – Vi max
Io nom 1
td
25
min typ max
24.14 47.72
see table 1 Model Selection
Static line regulation
vo d
21
min typ max
15.09 23.86
Unit
see fig. 4 Typical voltage Vo1 versus output currents Io
∆Vo V
∆Vo Ic Static cross load
regulation 4
12.07 14.91
48 V
±10 ±30
50 100
mVpp
-
±12 ±50
±15 ±60
±15 ±60
±15 ±60
25
13
50
17
60
30
80
60 150
±15
0
±20
0
±30
0
±40
mV
-
Dynamic Voltage
V i nom
load
deviation Io nom ↔ 1/3 Io nom 2
regulation
Recovery IEC/EN 61204
time
±220
±110
±150
±130
±150
0.6
0.6
0.5
1
2
ms
Dynamic Voltage
Vi nom
cross load deviation Io nom ↔ 1/3 Io nom 3
regulation 4
Recovery IEC/EN 61204
time
+10
–100
+10
–75
+10
–140
+20
–200
-
mV
0.05
0.5
0.2
0.3
0.5
0.7
1
2
-
ms
Temperature
coefficient
∆Vo /∆TC
±0.02
±0.02
±0.02
±0.02
±0.02
%/K
±1.0
±2.4
±3.0
±4.8
±9.6
mV/K
Vi min – Vi max
0 – I o nom
With multiple-output models, all outputs are loaded with the nominal current.
Condition for specified output. With multiple-output models, other output(s) loaded with constant current Io nom. See fig. 5 Dynamic load
regulation.
Condition for non-specified output, individually tested, other output(s) loaded with constant current Io nom. See fig. 5 Dynamic load
regulation.
Multiple-output models.
By suppressor diode.
BCD20018-G Rev AE1, 16-Apr-2018
MELCHER
The Power Partners.
Page 8 of 26
M Series Data Sheet
50 Watt DC-DC and AC-DC Converters
Output Characteristic and Protection
Each output is protected by a suppressor diode, which under
worst case conditions may become a short circuit. The
suppressor diodes are not designed to withstand externally
applied overvoltages. Overload at any of the outputs will cause
a shutdown of all outputs. A red LED indicates an overload
condition at the respective output.
Io nom
IoL1
IoL2, IoL3
1.0
0.95
Notes: Sufficient forced cooling or an additional heat sink allow TA
to pass over 71 °C, if TC max is not exceeded.
A temperature sensor generates an internal inhibit signal
disabling the outputs, when the case temperature exceeds
TC max. The outputs automatically recover, when the
temperature drops below this limit.
Io1
Io2,Io3
0.5
Caution: The installer must ensure that under all operating
conditions TC remains within the limits stated in the table
Temperature specifications.
For -7 or -9 models at an ambient temperature TA of 85 °C with
only convection cooling, the maximum permissible current for
each output is approx. 50% of its nominal value; see figure 6.
Vo
Vo nom
temperature of surrounding components and surfaces. TA max is
therefore, contrary to TC max, an indicative value only.
Io /Io nom
Forced cooling
1.0
0.5
05022a
1.0
1.2
05031a
0
0.8
Io
Io nom
Convection cooling
0.6
TC max
0.4
Fig. 4
Typical voltage Vo versus output currents Io.
0.2
Vo
0
∆Vo I
Vod
∆Vo I
50
60
70
80
90
100
TA [°C]
Fig. 6
td
Vod
Output current derating versus temperature
td
t
Io/Io nom
1
0.3
0
≥10 µs
≥10 µs
05010a
t
Main outputs of equal nominal voltage can be connected in
parallel. It is important to assure that the main output of a
multiple-output converter is forced to supply a minimum current
of 0.1 A to enable correct operation of its own auxiliary outputs.
In parallel operation, one or more of the main outputs may
operate continuously in current limitation, causing an increase
of the case temperature TC. Consequently, a reduction of the
max. ambient temperature by 10 K is recommended.
Fig. 5
Dynamic load regulation Vo d versus load change.
Thermal Considerations and Protection
If a converter is located in free, quasi-stationary air (convection
cooling) at the indicated maximum ambient temperature TA max
(see table Temperature specifications) and is operated at its
nominal input voltage and output power, the temperature
measured at the measuring point of case temperature TC (see
Mechanical Data) will approach the indicated value TC max after
the warm-up phase. However, the relationship between TA and
TC depends heavily on the conditions of operation and
integration into a system. The thermal conditions are
influenced by input voltage, output current, airflow, and
BCD20018-G Rev AE1, 16-Apr-2018
Parallel and Series Connection
Main or auxiliary outputs can be connected in series with any
other output of the same or another converter. In series
connection, the maximum output current is limited by the
lowest current limit. Output ripple and regulation values are
added. Connection wiring should be kept as short as possible.
If output terminals are connected together in order to establish
multi-voltage configurations, e.g., +5.1 V, ±12 V etc., the
common-ground connecting point should be as close as
possible to the connectors of the converter in order to avoid
excessive output ripple voltages.
Note: Auxiliary outputs should never be connected in parallel!
MELCHER
The Power Partners.
Page 9 of 26
M Series Data Sheet
50 Watt DC-DC and AC-DC Converters
Output Current Allocation for Special Models
Output currents differing from those given for standard models
(see Model Selection) can be provided on request. A maximum
output power of 50 W should be considered, if an ambient
temperature range of – 40 to 71 °C is required. The maximum
permissible output currents are indicated in the table below. If
the output voltages are different from standard values, the
relevant output currents have to be adapted accordingly.
With reduced maximum ambient temperature or with forced
cooling, the total output power may exceed 50 W. Customized
configurations always need to be checked by a feasibility study
first. Please ask the Company for more information.
Table 5: Current allocation with special models
Output voltage
all types
Vo1/2/3 nom [V]
Output 1
all types
I o1 max [A]
Output 2
AM – LM2000
I o2 max [A]
Output 2
AM – LM3000
I o2 max [A]
Output 3
AM – LM3000
I o3 max [A]
TA [°C ]
TC [°C ]
5.1
12
15
24
8.0
4.0
3.4
2.0
4.0
2.0
1.7
1.0
1.8 (2.5 1)
1.5
1.2
0.7
1.5
1.2
1.0
0.5
– 40 to 71
–25 to 95
5.1
12
15
24
10.0
5.0
4.0
2.5
4.5
2.5
2.0
1.3
2.1 (2.8 1)
1.7
1.5
0.9
1.8
1.5
1.3
0.7
–25 to 60
–25 to 90
5.1
12
15
24
11.0
6.0
4.6
3.0
5.0
3.0
2.3
1.5
2.4 (3.0 1)
2.0
1.7
1.0
2.0
1.7
1.5
0.8
–25 to 50
–25 to 85
2
1
Special high-current components required.
2
Temperature
Vi min has to be increased.
Hold-up Time and Output Response
When the input voltage is switched off, the output voltage will
remain high for a certain hold-up time t h (see fig. 7) before the
output voltage falls below 0.95 Vo nom. To achieve the hold-up
times indicated in fig. 8, AM, BM, CM, DM, and FM models
require an external series diode in the input line. This is
necessary to prevent the discharge of the input capacitor
through the source impedance or other circuits connected to
the same source. EM and LM models have a built-in series
diode. In AM, BM, CM, DM, and FM models, no series diode is
built-in, since it would generate additional power losses inside
the converter.
Note: For hold-up time with option V, refer to Option V.
The behavior of the outputs is similar with either the input
voltage applied or the inhibit switched low.
No output voltage overshoot occurs, when the converter is
turned on or off.
th [ms]
05024a
1000
LM
EM
100
CM/DM
AM/BM/FM
Vo/Vo nom
05025a
0.95
10
0.1
0
tr
Vi
tf
t
th
1
0
1
t
Inhibit
1
0
t
0.1
1
2
3
4
5
Vi DC
______
Vi min DC
6
Fig. 7
Fig. 8
Output response times versus Vi or inhibit control
Typical hold-up time t h versus input voltage at Io nom
BCD20018-G Rev AE1, 16-Apr-2018
MELCHER
The Power Partners.
Page 10 of 26
M Series Data Sheet
50 Watt DC-DC and AC-DC Converters
Table 6: Output response time t r and t f (see fig. 7). Values not applicable for models equipped with option E.
Type of converter
tr at Po = 0 and t f at Po = Po nom
typ
max
t r and t f at Po = 3/4 Po nom
typ
max
t r at Po = Po nom
typ
max
Unit
ms
AM – LM1001-9R
AM – LM1301-9R
AM – LM1501-9R
AM – LM1601-9R
AM – LM1901-9R
5
10
5
15
65
10
20
10
30
130
5
15
10
25
100
10
30
20
50
200
10
20
30
40
165
20
40
60
80
330
AM – LM2320-9
AM – LM2540-9
20
15
40
30
30
20
60
40
50
35
100
70
AM – LM3020-9
AM – LM3040-9
55
40
110
80
85
60
170
120
145
100
290
200
Conditions:
R input not connected. For multiple-output models the figures indicated in the table relate to the output, which reacts slowest. All
outputs are resistively loaded. Variation of the input voltage within Vi min – Vi max does not influence the values considerably.
Auxiliary Functions
Inhibit
Iinh [mA]
The outputs of the converters may be enabled or disabled by
means of a logic signal (TTL, CMOS, etc.) applied between the
inhibit input i and the negative pin of output 1 (Vo1–). In
systems with several converters, this feature can be used, for
example, to control the activation sequence of the converters.
If the inhibit function is not required, connect the inhibit pin 2 to
pin 23 to enable the outputs (active low logic, fail safe). The
response times are specified in table 6.
2.0
Vinh = 2.4 V
Vinh = 0.8 V
06032a
1.6
1.2
0.8
0.4
Vo = on
Vo = off
0
–0.4
06031a
Vi+
Vo+
i
–0.8
–50
–10
0 10
30
50
Vinh [V]
Iinh
Vinh
Vi–
–30
Fig. 10
Typical inhibit current I inh versus inhibit voltage Vinh
Vo–
Fig. 9
Definition of Vinh and Iinh.
Table 7: Inhibit data
Characteristics
Vinh
Inhibit input voltage to keep
output voltage
I inh
Inhibit current
BCD20018-G Rev AE1, 16-Apr-2018
Vo = on
Vo = off
Conditions
min
V i min – V i max
TC min – TC max
–50
Vinh = 0
– 60
MELCHER
The Power Partners.
typ
2.4
max
Unit
0.8
V
50
–100
–220
µA
Page 11 of 26
M Series Data Sheet
50 Watt DC-DC and AC-DC Converters
R-Control for Output Voltage Adjustment
As a standard feature, single-output models without option P
offer an adjustable output voltage identified by letter R in the
type designation.
Note: With open R input, Vo = Vo nom.
The output voltage Vo can either be adjusted by an external
voltage (Vext) or by an external resistor (Rext1 or Rext2). The
adjustment range is approximative 0 – 110% of Vo nom. For
output voltages Vo > Vo nom, the minimum input voltage Vi min
specified in Electrical Input Data increases proportionally to
Vo/Vo nom.
JM075
L
Rext 2
4 kΩ
R
+
Control
logic
+
Vext
Rext1
(Vo – 2.5 V)
Rext2 ≈ 4 kΩ • ––––––––––––––––––
2.5 V • (Vo/Vo nom – 1)
Caution: To prevent damage, Rext2 should never be less than
47 kΩ.
b) Adjustment by means of an external control voltage Vext
between G and R pin.
The control voltage range is 0 to 2.75 V and allows for
adjustment in the range of Vo ≈ 0 to 110% of Vo nom.
–
G
N
or: Between the R pin and Vo+ to achieve an output voltage
range of Vo ≈ 100 to 110% of Vo nom.
Note: R inputs of n converters with paralleled outputs may be
paralleled too, but if only one external resistor is used, its
value should be Rext1/n or Rext2 / n respectively.
Vo+
Vref = 2.5 V
a) Adjustment by means of an external resistor Rext.
Depending upon the value of the required output voltage,
the resistor shall be connected:
either: Between the R and G pin to achieve an output
voltage adjustment range of Vo ≈ 0 to 100 % of Vo nom.
Vo
Rext1 ≈ 4 kΩ • –––––––––
Vo nom – Vo
Vo • 2.5 V
Vext ≈ ––––––––
Vo nom
Vo–
Caution: The external control voltage should be in the range
0 to +3 V to prevent the converter from damage.
Fig. 11
Output voltage adjustment
Table 8a: Rext1 for Vo < Vo nom (conditions: Vi nom, Io nom, rounded up to resistor values E 96, Rext2 is not fitted.)
Vo nom = 5.1 V
Vo [V]
Rext1 [kΩ]
0.5
1.0
1.5
2.0
2.5
3.0
3.5
4.0
4.5
5.0
0.432
0.976
1.65
2.61
3.83
5.76
8.66
14.7
30.1
200.0
Vo nom = 12 V
Vo [V]
Rext1 [kΩ]
Vo nom = 15 V
Vo [V]
Rext1 [kΩ]
Vo nom = 24 V
Vo [V]
Rext1 [kΩ]
Vo nom = 48 V
Vo [V]
Rext1 [kΩ]
2.0
3.0
4.0
5.0
6.0
7.0
8.0
9.0
10.0
11.0
2.0
4.0
6.0
8.0
9.0
10.0
11.0
12.0
13.0
14.0
4.0
6.0
8.0
10.0
12.0
14.0
16.0
18.0
20.0
22.0
8.0
12.0
16.0
20.0
24.0
28.0
32.0
36.0
40.0
44.0
0.806
1.33
2.0
2.87
4.02
5.62
8.06
12.1
20.0
44.2
0.619
1.47
2.67
4.53
6.04
8.06
11.0
16.2
26.1
56.2
0.806
1.33
2.0
2.87
4.02
5.62
8.06
12.1
20.0
44.2
0.806
1.33
2.0
2.87
4.02
5.62
8.06
12.1
20.0
44.2
Table 8b: R2 for Vo > Vo nom (conditions: Vi nom, Io nom, rounded up to resistor values E 96, Rext1 is not fitted.)
Vo nom = 5.1 V
Vo [V]
Rext2 [kΩ]
5.15
5.20
5.25
5.30
5.35
5.40
5.45
5.50
464
215
147
110
90.9
78.7
68.1
61.9
Vo nom = 12 V
Vo [V]
Rext2 [kΩ]
12.1
12.2
12.3
12.4
12.5
12.6
12.7
12.8
13.0
13.2
BCD20018-G Rev AE1, 16-Apr-2018
1780
909
619
464
383
316
274
249
200
169
Vo nom = 15 V
Vo [V]
Rext2 [kΩ]
15.2
15.4
15.6
15.8
16.0
16.2
16.4
16.5
1470
750
511
383
332
274
237
226
MELCHER
The Power Partners.
Vo nom = 24 V
Vo [V]
Rext2 [kΩ]
24.25
24.50
24.75
25.00
25.25
25.50
25.75
26.00
26.25
26.40
3160
1620
1100
825
715
590
511
453
402
383
Vo nom = 48 V
Vo [V]
Rext2 [kΩ]
48.5
49.0
49.5
50.0
50.5
51.0
51.5
52.0
52.5
52.8
6810
3480
2370
1780
1470
1270
1100
953
845
806
Page 12 of 26
M Series Data Sheet
50 Watt DC-DC and AC-DC Converters
Display Status of LEDs
Vo1 > 0.95 to 0.98 Vo1 adj
06002a
LEDs "OK" and "i" status versus input voltage Vi
OK
i
Io L
Conditions: Io ≤ Io nom , TC ≤ TC max , Vinh ≤ 0.8 V
Vi
Vi uv
Vi min
Vi max Vi ov
Vo1 > 0.95 to 0.98 Vo1 adj
Vi uv = undervoltage lockout, Vi ov = overvoltage lockout
Vi abs
Vo1 < 0.95 to 0.98 Vo1 adj
OK
Io L
LEDs "OK" and "Io L" status versus output current I o
Io
Io nom
Conditions: Vi min – Vi max , TC ≤ TC max , Vinh ≤ 0.8 V
IoL
i
LED "i" versus case temperature
TC
TC max
Conditions: Vi min – Vi max , I o ≤ I o nom , Vinh ≤ 0.8 V
TPTC threshold
Vinh threshold
i
Vinh
+0.8 V
-50 V
LED off
+2.4 V
LED status undefined
+50 V
LED "i" versus Vinh
Conditions: Vi min – Vi max , I o ≤ I o nom , TC ≤ TC max
LED on
Fig. 12
Status of LEDs.
BCD20018-G Rev AE1, 16-Apr-2018
MELCHER
The Power Partners.
Page 13 of 26
M Series Data Sheet
50 Watt DC-DC and AC-DC Converters
Electromagnetic Compatibility (EMC)
A suppressor diode or a metal oxide VDR (depending upon
converter model) together with an input fuse and an input filter
form an effective protection against high input transient
voltages, which typically occur in most installations, but
especially in battery-driven mobile applications. The M Series
has been successfully tested to the following specifications:
Electromagnetic Immunity
Table 9: Immunity type tests
Phenomenon
Standard
Supply related
surges
RIA 12 3
Level
Coupling
mode 1
Value
applied
A4
+i/–i
B
Direct transients
C
Indirect coupled
transients
Source
imped.
Test
procedure
In
oper.
Perf.
crit. 2
3.5 • Vbatt
2/20/2 ms
0.2 Ω
A
0.1/1/0.1 s
1 positive
surge
yes
1.5 • Vbatt
5Ω
5 pos. and 5 neg.
impulses
yes
A
960 Vp
10/100 µs
D3
1800 Vp
5/50 µs
E
3600 Vp
0.5/5 µs
F
4800 Vp
0.1/1 µs
G
8400 Vp
0.05/0.1 µs
H
–i/c, +i/–i
Waveform
1800 Vp
5/50 µs
J
3600 Vp
0.5/5 µs
K
4800 Vp
0.1/1 µs
L
8400 Vp
0.05/0.1 µs
contact discharge
± 8000 Vp
1/50 ns
10 positive and
10 negative
discharges
A
±15000 Vp
330 Ω
150 pF
yes
air discharge
antenna
20 V/m
AM 80%
1 kHz
n.a.
80 to 1000 MHz
yes
A 11
10 V/ m
50% duty cycle,
200 Hz repetition
frequency
900 ±5 MHz
yes
A
50 Ω
60 s positive
60 s negative
transients per
coupling mode
yes
A 11
5 pos. and 5 neg.
surges per
yes
A
0.15 to 80 MHz
yes
A
60 s in all 3 axis
yes
A
5
Electrostatic
discharge
(to case)
IEC/EN
61000-4-2
4
Electromagnetic
field
IEC/EN
61000-4-3
x6
–o/c, +o/–o, –o/–i
100 Ω
A 11
Electromagnetic ENV 50204
field,
pulse modulated
47
Electrical fast
transient/burst
IEC/EN
61000-4-4
38
capacitive, o/c
± 2000 Vp
8
direct, i/c, +i/–i
± 2000 Vp
± 4000 Vp
bursts of 5/50 ns
2.5/5 kHz over
15 ms; burst
period: 300 ms
Surge
IEC/EN
61000-4-5
39
i/c
2000 Vp
1.2/50 µs
12 Ω
+i/–i
1000 Vp
Conducted
disturbances
IEC/EN
61000-4- 6
3 10
i, o, signal wires
10 VAC
(140 dBµV)
AM 80%
1 k Hz
150 Ω
Power frequency
magnetic field
IEC / EN
61000-4-8
3 12
--
3
4
1
2
3
4
5
6
7
8
9
10
11
12
2Ω
100 A/m
A 11
B
i = input, o = output, c = case
A = normal operation, no deviation from specs.; B = normal operation, temporary loss of function or deviation from specs possible
RIA 12 covers or exceeds IEC 60571-1 and EN 50155:1995. Surge D corresponds to EN 50155:2001, waveform A; surge G corresponds to EN 50155:2001, waveform B.
Only met with EM (110 V battery) and extended input range models (customer-specific) of BM (24 V battery) and CM (48 V battery).
Standard DK models (72 V battery) are not damaged, but overvoltage lockout will occur during the surge.
Exceeds EN 50121-3-2:2015 table 6.3 and EN 50121-4:2006 table 1.4.
Corresponds to EN 50121-3-2:2015 table 6.1 and exceeds EN 50121-4:2006 table 1.1. Valid for version V104 or higher.
Compliance with digital mobile phones.
Corresponds to EN 50121-3-2:2015 table 5.2 and EN 50121-4:2006 table 2.2.
Covers or exceeds EN 50121-3-2:2015 table 4.3 and EN 50121-4:2006 table 2.3.
Corresponds to EN 50121-3-2:2015 table 5.1 and EN 50121-4:2006 table 3.1 (radio frequency common mode).
Perf. criterion B for triple-output models.
Corresponds to EN 50121-4:2006 table 1.3 for AC systems
BCD20018-G Rev AE1, 16-Apr-2018
MELCHER
The Power Partners.
Page 14 of 26
M Series Data Sheet
50 Watt DC-DC and AC-DC Converters
Electromagnetic Emissions
dBµV
dBµV/m
PMM 8000 PLUS: Peak, conducted Vi+, QP + AV, 2011-08-02, 10:48 h
CM1601-9ER, Ui=60 V, Uo=24 V Io= 2 A
EN 55022 A (qp)
JM131
80
TÜV-Divina, ESVS 30:R&S, BBA 9106/UHALP 9107:Schwarzb., QP, 2011-08-03
Testdistance 10 m, CM1601-9ER, Ui= 60 VDC, Uo=24 V Io= 2 A
50
EN 55011 A
40
JM130
EN 55022 A (av)
60
30
300
>300
>300
>100 2
MΩ
Creepage distances
≥ 3.2 3
--
--
--
mm
Electric
strength
test
1
2
3
•
•
•
•
•
According to IEC/EN 60950, subassemblies connecting input to output are pre-tested with 5.6 kVDC or 4 kVAC.
Tested at 300 VDC
Input to outputs: ≥ 6.4 mm
the input voltage of 250 VAC or 400 VDC
Functional insulation between output(s) and case
Functional insulation between the outputs
Pollution degree 2 environment
Overvoltage category II
Altitude up to 2000 m
insulation is needed between the AC mains and the input of the
converter. Only voltage adaption and rectification to the
specified input voltage range of a DC/DC converter is needed.
The converters are subject to manufacturing surveillance in
accordance with the above mentioned standards and with ISO
9001:2008.
Isolation
Table 15 shows a possible installation configuration, compliance with which causes the output circuit of the DC-DC
converter to be an SELV circuit according to IEC/EN 60950 up
to a configured output voltage (sum of nominal voltages if in
series or +/– configuration) of 48 V. However, it is the sole
responsibility of the installer to assure the compliance with the
relevant and applicable safety regulations.
Max. 250 VAC or
400 VDC
The electric strength test is performed in the factory as routine
test in accordance with EN 50514 and IEC/EN 60950. The
company will not honor any warranty claims resulting from
incorrectly executed electric strength field tests.
~
+
Mains
~
Safety of Operator-Accessible Output Circuits
If the output circuit of a DC-DC converter is operatoraccessible, it shall be an SELV circuit according to the IEC/EN
60950 safety standards.
Since the M Series converters provide double or reinforced
insulation between input and output based upon a rated
primary input voltage of 250 VAC or 400 VDC, only functional
10018a
AC-DC
front
end
+
Battery
Fuse
Fuse
Max. 250 VAC or
400 VDC
DC-DC
converter
SELV
–
Earth connection
Fig. 17
Schematic safety concept
Table 15: Safety concept leading to an SELV output circuit
Conditions Front end
DC-DC converter
Nominal
supply
voltage
Minimum required grade
of insulation, to be provided by the AC-DC front
end, including mains
supplied battery charger
Maximum rated
DC output voltage
from the front end
Mains
250 VAC
Operational (i.e. there is
no need for electrical
isolation between the
mains supply voltage and
theDC-DC converter
input voltage)
400 VDC 1 (The
Primary circuit
rated voltage
between any input
pin and earth can
be up to 250 VAC
or 400 VDC.)
1
2
Minimum required Equipsafety status of the ment
front end output
circuit
A – LM
Result
Measures to achieve the
specified safety status of
the output circuit
Safety status
of the DC-DC
converter
output circuit
Double or reinforced
insulation, based on
250 VAC and 400 VDC
(provided by the DC-DC
converter) and earthed
case 2
SELV circuit
The front end output voltage should match the specified operating input voltage range of the DC-DC converter.
The earth connection has to be provided by the installer according to the safety standard IEC/EN 60950.
BCD20018-G Rev AE1, 16-Apr-2018
MELCHER
The Power Partners.
Page 19 of 26
M Series Data Sheet
50 Watt DC-DC and AC-DC Converters
Description of Options
Table 16: Survey of options
Option
1
2
3
Function of option
Characteristic
-7
Former standard operational ambient temperature range
TA = – 25 to 71°C
A
Test sockets at front panel for check of output voltage
Vo internally measured at the connector terminals
E
Electronic inrush current limitation circuitry
Active inrush current limitation, only for CM, EM, LM models
P1
Potentiometer for fine adjustment of output voltage
Adjustment range ±5% of Vo nom, excludes R input
F
Input fuse built-in
Fuse not externally accessible, only for FM1000
H
Enhanced output to case electric strength test voltage
See table Isolation
D2
Input and/or output undervoltage monitoring circuitry
Safe data signal output (D0 – D9)
V23
Input and/or output undervoltage monitoring circuitry
ACFAIL signal according to VME specifications (V0, V2, V3)
K
Coding strip at the connector
Ensuring correct population of DIN-racks
G
RoHS
RoHS-compatible for all six substances
Models equipped with option P do not provide the R function; pins 14 and 17 are not connected.
Option D excludes option V and vice versa.
Only available if main output voltage Vo1 = 5.1 V
Table 17: Configuration of option A and option P
AM – LM1000
Output 1
Type of option
AM – LM2000
Output 1
Output 2
Output 1
AM – LM3000
Output 2
Output 3
Potentiometer 1
yes
yes
yes
yes
no
no
Test sockets
yes
yes
yes
yes
no
no
Models equipped with option P do not provide the R function; pins 14 and 17 are not connected.
Option -7 stays for the operational ambient temperature range
from –25 to 71 °C, which may be preferred by some customers
for reasons of documentation or approvals.
A Test Sockets
Test sockets (pin Ø = 2 mm, distance d = 5.08 mm) are located
at the front of the converter. The output voltage is sensed at the
connector pins inside of the converter. Outputs 2 and 3 of tripleoutput models are not sensed.
P Potentiometer
Built-in multi-turn potentiometers provide an output voltage
adjustment range of minimum ± 5% of Vo nom and are
accessible through holes in the front cover. Compensation of
voltage drop across connector and wiring becomes easily
achievable. For output voltages Vo > Vo nom , the minimum input
voltage according to Electrical Input Data increases
proportionally to Vo /Vo nom . Triple-output models allow only the
adjustment of Vo1.
Note: Potentiometers
applications.
are
not
recommended
for
For applications requiring an improved inrush current limitation,
an active electronic circuit as shown in fig.18 has been
developed. Typical inrush current waveforms of units equipped
with this option are shown below.
CM models meet the CEPT/ETSI standards for 48 V supply
voltage according to ETS 300132-2, if fitted with option E
combined with option D6 (input voltage monitoring). Option D6,
externally adjustable via potentiometer, is necessary to disable
the converter at input voltages below the actual service ranges,
avoiding an excessive input current when the input voltage is
raised slowly according to ETS 300132-2. Option D6 threshold
level Vt i + Vh i (refer to description of option D) should be
adjusted to 36 – 40.5 V for 48 V nominal supply voltage (for 60
V systems, threshold should be set to 44 – 50 V). The D output
(pin 5) should be connected to the inhibit (pin 2). For
applications, where potentiometers are not allowed, refer to
option D9.
11018a
mobile
Control logic
FET
Rectifier
(LM models)
E Electronic Inrush Current Limitation
Available for CM, EM and LM models.
The standard version of the models CM, DM, EM and LM
include a passive inrush current limitation with an NTC resistor.
BCD20018-G Rev AE1, 16-Apr-2018
Converter
- 7 Former Standard Temperature Range
Input filter
1
RS
RI
Ci
Fig. 18
Option E block diagram
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Page 20 of 26
M Series Data Sheet
50 Watt DC-DC and AC-DC Converters
Table 18: Inrush current characteristics with option E
Characteristic
CM
at Vi = 110 VDC
typ
max
EM, LM
at Vi = 110 VDC
typ
max
EM, LM
at Vi = 372 VDC
typ
max
Unit
Iinr p
Peak inrush current
6.5
8
2.2
4
7.3
10
A
tinr
Inrush current duration
22
30
10
20
20
40
ms
by DC input voltages do not need to be derated within the full
specified input voltage range.
Ii [A]
10
F Fuse Not Accessible
11019a
8
Standard M converters have a fuseholder containing a 5 × 20
mm fuse, which is externally accessible and located in the back
plate near to the connector. Some applications require an
inaccessible fuse. Option F provides a fuse mounted directly
onto the main PCB inside the case (only FM1000).
CM at 110 VDC
EM, LM at 372 VDC
6
EM, LM at 110 VDC
tinr
4
tinr
Ii = Po /(Vi • η)
2
Normal operation:
FET fully conducting
t [ms]
0
0
10
20
30
40
The full self-protecting functions of the converter do normally
not lead to a broken fuse, except as a result of inverse polarity
at the input of an AM, BM, CM, DM, or FM models, or if a power
component inside fails. In such cases the defective converter
must be returned to the Company for repair.
H Enhanced Electric Strenght Test
Electric strength test output to case; see table Isolation.
Fig. 19
D Undervoltage Monitor
Typical inrush current waveforms of CM, EM, and LM
converters with option E
Precautions:
In order to avoid overload of the series resistor RI, the on/off
switching cycle should be limited to 12 s, if switched on/off
continuously. There should not be more than 10 start-up cycles
within 20 s at a case temperature of 25 °C.
If CM models are driven by input voltages below
35 VDC or LM models below 100 VAC, the maximum case
temperature should be derated by 10 °C, or the total output
power should be derated by 20%. EM and LM models driven
The input and/or output undervoltage monitor operates
independently of the built-in input undervoltage lock-out circuit.
A logic "low" (JFET output) or "high" signal (NPN output) is
generated at pin 5, when one of the monitored voltages drops
below the preselected threshold level Vt. The return for this
signal is Vo1– (pin 23). The D output recovers, when the
monitored voltage(s) exceed(s) Vt + V h. The threshold level Vt
is either adjustable by a potentiometer accessible through a
hole in the front cover, or adjusted in the factory to a fixed value
specified by the customer.
Option D exists in various versions D0 – D9, as shown in the
table below:
Table 19: Undervoltage monitor functions
Output type
JFET
NPN
2
3
4
Minimum adjustment range
of threshold level Vt
Vti
Vto
Typical hysteresis Vh [% of Vt ]
for Vt min – Vt max
Vhi
Vho
D1
D5
no
yes
–
3.5 V – 48 V 1
–
2.3 – 1
D2
D6
yes
no
Vi min – Vi max 1
–
3.0 – 0.5
–
0.95 – 0.98 Vo1
2
3.0 – 0.5
"0"
2
D3
1
Monitoring
Vi
Vo1
D7
yes
yes
Vi min – Vi max
1
D4
D8
no
yes
–
0.95 – 0.98 Vo1
–
"0"
D0
D9
no
yes
–
3.5 V – 48 V 3
–
1.8 – 1
yes
no
Vi min – Vi max 3 4
–
2.2 – 0.4
–
yes
yes
Vi min – Vi max 3 4
0.95 – 0.98 Vo1 2
2.2 – 0.4
Threshold level adjustable by potentiometer (not recommended for mobile applications)
Fixed value between 95% and 98% of Vo1 (tracking)
Fixed value, resistor-adjusted according to customer's specification ±2% at 25 °C; individual type number is determined by the company.
Adjusted at Io nom
BCD20018-G Rev AE1, 16-Apr-2018
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Page 21 of 26
M Series Data Sheet
50 Watt DC-DC and AC-DC Converters
JFET output (D0 – D4):
Threshold tolerances and hysteresis:
Connector pin D is internally connected via the drain-source
path of a JFET (self-conducting type) to the negative potential
of output 1. VD ≤ 0.4 V (logic low) corresponds to a monitored
voltage level (Vi and/or Vo1) < Vt. The current I D through the
JFET should not exceed 2.5 mA. The JFET is protected by a
0.5 W Zener diode of 8.2 V against external overvoltages.
If V i is monitored, the internal input voltage after the input filter
and rectifier (EM and LM types) is measured. Consequently,
this voltage differs from the voltage at the connector pins by the
voltage drop ∆V ti across input filter and rectifier. The threshold
level of the D0 and D9 options is adjusted in the factory at
nominal output current Io nom and TA = 25 °C. The value of ∆V ti
depends upon input voltage range (AM, BM, etc.), threshold
level Vt , temperature, and input current.
Vi , Vo1 status
D output, V D
Vi or Vo1 < Vt
low, L, V D ≤ 0.4 V at I D = 2.5 mA
Vi and Vo1 > Vt + Vh
high, H, I D ≤ 25 µ A at V D = 5.25 V
VD
∆Vti
Vhi
11021a
Po = Po nom
Po = 0
Po = 0
Connector pin D is internally connected via the collectoremitter path of a NPN transistor to the negative potential of
output 1. VD ≤ 0.4 V (logic low) corresponds to a monitored
voltage level (Vi and/or Vo1) > Vt + Vh. The current ID through
the open collector should not exceed 20 mA. The NPN output
is not protected against external overvoltages. VD should not
exceed 40 V.
Po = Po nom
VD high
NPN output (D5 – D9):
VD low
Vti
Vi
Fig. 22
Vi , Vo1 status
D output, VD
Vi or Vo1 < Vt
high, H, I D ≤ 25 µA at VD = 40 V
Vi and Vo1 > Vt + Vh
low, L, VD ≤ 0.4 V at I D = 20 mA
Definition of Vti, ∆V ti , and V hi (JFET output)
11006
Vo1+
Rp
Input
ID
D
VD
Vo1–
Fig. 20
Options D0 – D4, JFET output
11007a
Vo1+
Input
Rp
ID
D
VD
Vo1–
Fig. 21
Options D5 – D9, NPN output
BCD20018-G Rev AE1, 16-Apr-2018
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Page 22 of 26
M Series Data Sheet
50 Watt DC-DC and AC-DC Converters
Input voltage monitoring
NPN VD
VD high
11008a
3
VD low
3
3
3
t
0
ID
ID high
ID low
0
t
JFET VD
VD high
VD low
0
t
th1
Vo1
Vo1 nom
1
0.95
tlow min4
tlow min4
tlow min4
thigh min
th1
t
0
Vi [V DC]
Vti + Vhi
Vti
t
0
Input voltage failure
Input voltage sag
Switch-on cycle
Output voltage monitoring
NPN VD
VD high
Switch-on cycle and subsequent
input voltage failure
2
3
3
VD low
t
0
ID
ID high
ID low
0
t
Fig. 23
JFET VD
VD high
Relationship between Vi, Vo1, VD, ID, and Vo1/Vo nom
versus time.
VD low
0
t
tlow min4
Vo1
Vo1 nom
Vto +Vho
Vto
1
2
3
t
0
4
See Electrical Output Data for hold-up time.
With output voltage monitoring the hold-up time th = 0
The D signal remains high, if the D output is
connected to an external source.
t low min = 40 – 200 ms, typically 80 ms
Output voltage failure
V ACFAIL Signal (VME)
Available for converters with Vo1 = 5.1 V. This option defines an
undervoltage monitoring circuit for the input or the input and
main output voltage equivalent to option D and generates the
ACFAIL signal (V signal), which conforms to the VME standard.
The low state level of the ACFAIL signal is specified at a sink
current of IV = 48 mA to VV ≤ 0.6 V (open-collector output). The
BCD20018-G Rev AE1, 16-Apr-2018
pull-up resistor feeding the open-collector output should be
placed on the VME backplane.
After the ACFAIL signal has gone low, the VME standard
requires a hold-up time t h of at least 4 ms before the 5.1 V
output drops to 4.875 V, when the 5.1 V output is fully loaded.
This hold-up time t h is provided by the internal input
capacitance. Consequently the working input voltage and the
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M Series Data Sheet
50 Watt DC-DC and AC-DC Converters
threshold level Vti should be adequately above the minimum
input voltage Vi min of the converter, so that enough energy is
remaining in the input capacitance. If the input voltage is below
the required level, an external hold-up capacitor (Ci ext) should
be added.
Formula for threshold level for desired value of t h :
2 • Po • (t h + 0.3 ms) • 100
––––––––––––––––––––– + Vi min2
C i min • η
Vti =
whereas:
Ci min = minimum internal input capacitance [mF], according
to the table below
Ci ext = external input capacitance [mF]
Po
= output power [W]
η
= efficiency [%]
= hold-up time [ms]
th
Vi min = minimum input voltage [V]
Vt i
= threshold level [V]
Notes: The threshold level V ti of option V2 and V3 is adjusted in
the factory to a value according to the table below. A decoupling
diode should be connected in series with the input of AM, BM, CM,
DM, and FM converters to avoid the input capacitance discharging
through other loads connected to the same source voltage. If LM
models are powered by AC, an external input capacitor cannot be
applied unless an additional rectifier is provided.
Formula for additional external input capacitor
2 • Po • (t h + 0.3 ms) • 100
– C i min
C i ext = –––––––––––––––––––––
η • (Vti 2 – Vi min2)
Table 20: Available internal input capacitance and factory potentiometer setting of Ut i with resulting hold-up time
Types
AM
BM
CM
DM
EM
FM
LM
Ci min
Vt i
th
2.6
0.67
0.37
0.14
0.14
0.37
0.14
mF
9.5
19.5
39
61
104
39
120
VDC
0.34
0.69
1.92
1.73
6.69
2.92
8.18
ms
Option V operates independently of the built-in input undervoltage lockout circuit. A logic "low" signal is generated at pin 5
as soon as one of the monitored voltages drops below the preselected threshold level V t. The return for this signal is Vo1–
(pin 23). The V output recovers, when the monitored voltage
Unit
exceeds Vt + Vh. The threshold level Vt is either adjustable by a
potentiometer, accessible through a hole in the front cover, or
adjusted in the factory to a determined customer-specific
value.
Versions V0, V2 and V3 are available as shown below.
Table 21: Undervoltage monitor functions
V output
(VME compatible)
V2
V3
V0
1
2
3
4
Monitoring
Vi
V o1
Minimum adjustment range
of threshold level Vt
V ti
V to
yes
no
V i min – V i max 1
yes
yes
V i min – V i max
1
–
3.0 – 0.5
-
2
3.0 – 0.5
"0"
-
2.2 – 0.4
-
0.95 – 0.98 V o1 2
2.2 – 0.4
"0"
0.95 – 0.98 V o1
34
yes
no
V i min – V i max
yes
yes
V i min – V i max 3 4
Typical hysteresis U h [% of Vt ]
for Vt min – Vt max
V hi
V ho
Threshold level adjustable by potentiometer (not recommended for mobile applications).
Fixed value between 95% and 98% of Vo1 (tracking), output undervoltage monitoring is not a requirement of VME standard.
Adjusted at Io nom.
Fixed value, resistor-adjusted (±2%) acc. to customer's specifications; individual type designation is determined by the company.
11009a
V output (V0, V2, V3):
Vo1+
Connector pin V is internally connected to the open collector of
a NPN transistor. The emitter is connected to the negative
potential of output 1. VV - 0.6 V (logic low) corresponds to a
monitored voltage level (Vi and/or Vo1) < U t. The current I V
through the open collector should not exceed 50 mA. The NPN
output is not protected against external overvoltages. VV
should not exceed 80 V.
Vi, Vo1 status
Input
Rp
IV
V
VV
Vo1–
V output, VV
V i or V o1 < V t
low, L, V V ≤ 0.6 V at I V = 50 mA
Fig. 24
V i and V o1 > V t + V h
high, H, I V ≤ 25 µA at V V = 5.1 V
Output configuration of options V0, V2, V3
BCD20018-G Rev AE1, 16-Apr-2018
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M Series Data Sheet
50 Watt DC-DC and AC-DC Converters
VV
Threshold tolerances and hysteresis:
Vi is monitored after the input filter and rectifier (EM and LM
models). Consequently, this voltage differs from the voltage at
the connector pins by the voltage drop ∆Vt i across input filter
and rectifier. The threshold level of option V0 is factoryadjusted at Io nom and TA = 25 °C. ∆Vt i depends upon the input
voltage range (AM, BM, ...), threshold level Vt i, temperature,
and input current.
∆Vti
Vhi
11023a
Po = Po nom
Po = 0
Po = 0
Po = Po nom
VV high
VV low
Vi
Vti
Fig. 25
Definition of Vti, ∆Vti and Vhi
Input voltage monitoring
3
tlow min 2
tlow min 2
tlow min 2
V2 VV
UV high
3
3
11010a
4
4
tlow min 2
tlow min 2
VV low
t
0
V3 VV
VV high
3
3
3
VV low
t
0
th
th 1
Vo1
5.1 V
4.875 V
1
2.0 V
0
t
Vi [VDC]
Vti + Vhi
Vi
t
0
Input voltage failure
Input voltage sag
Switch-on cycle
Switch-on cycle and subsequent
input voltage failure
Output voltage monitoring
V2 VV
VV high
Fig. 26
4
VV low
Relationship between Vi, Vo1, VV, I V, and Vo1 /Vo nom
versus time.
4
t
0
V3 VV
VV high
tlow min
3
2
1
2
3
3
4
4
VV low
0
t
Vo1
5.1 V
4.875 V
VME request: minimum 4 ms
t low min = 40 – 200 ms, typically 80 ms
VV level not defined at Vo1 < 2.0 V
The V signal drops simultaneously with the output voltage,
if the pull-up resistor R P is connected to Vo1+. The V signal
remains high, if R P is connected to an external source.
K Coding Strip
2.0 V
0
t
Vi
A plastic part across the connector ensures correct population
of the DIN-rack.
G RoHS
Vti + Vhi
Vti
RoHS-compatible for all six substances.
t
0
Output voltage failure
BCD20018-G Rev AE1, 16-Apr-2018
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Page 25 of 26
M Series Data Sheet
50 Watt DC-DC and AC-DC Converters
Accessories
A great variety of electrical and mechanical accessories are
available including:
European
Projection
30
09125
15
– Various mating H11 connectors including solder, fast-on,
or press-fit terminals
– Pair of connector retention clips HZ Z 01209-G
– Code key system: 5 coding wedges HZZ00202-G
– Various front panels for 19" rack mounting
– Flexible H11 PCB board HZ Z 01208-G for connecting
with a mother board
– Universal mounting bracket UMB-LHMQ (HZZ00610-G)
for chassis or DIN-rail mounting in upright position.
– DIN-rail mounting brackets DMB-MHQ (HZZ00619-G)
– Mounting plate M (HZ Z 01208) for chassis or a wall
mounting, where only frontal access is given
– Battery sensor [S-KSMH...] for using the converter as
battery charger (different cell characteristics).
l
65
l: 2 m standard length
other cable lengths on request
adhesive tape
Battery temperature sensor S-KSMH...
For additional accessory product information, see the
accessory data sheets listed with each product series or
individual model at our web site.
Flexible H11 PCB
HZ Z 01208-G
Pair of connector
retention clips
HZ Z 01209-G
Mounting plate M (HZ Z 01210), connector
with fast-on terminals (HZ Z 00101-G),
secured with retention clips (HZ Z 01209-G)
DIN-rail mounting brackets
DMB-MHQ (HZZ00619-G)
Universal mounting bracket for DIN-rail
mounting (HZ Z 00610-G)
Different front
panels
NUCLEAR AND MEDICAL APPLICATIONS - These products are not designed or intended for use as critical components in life support systems,
equipment used in hazardous environments, or nuclear control systems.
TECHNICAL REVISIONS - The appearance of products, including safety agency certifications pictured on labels, may change depending on the
date manufactured. Specifications are subject to change without notice.
Copyright © 2018, Bel Power Solutions Inc. All rights reserved.
BCD20018-G Rev AE1, 16-Apr-2018
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Page 26 of 26
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