RCM Series Data Sheet
150 /300 W DC-DC Converters
Features
Description
The RCM Series converters are reliable power supplies for
railway and transportation systems. There are 2 input voltage
ranges covering all common railway batteries. The output
delivers 150 or 300 W at 12 or 24 V. The converters are
designed for chassis mounting and exhibit a closed housing.
Many options are available, such as an output ORing FET for
redundant operation, output voltage adjustment, interruption
time of 10 ms (class ST2), shutdown input, and an output
voltage monitor controlling a relay (change-over contact).
• RoHS lead-free-solder product
• 2 input voltage ranges, covering all railway batteries
• 2 output voltages, 12 and 24 V
• Closed housing for chassis mounting
• Extremely high efficiency and high power density
• Low inrush current
• 3 connectors: Input, output, auxiliary
• Overtemperature, overvoltage, overcurrent, and overload
protection
• Many options available
• Compliant to EN 50155, EN 50121-3-2
• Fire and smoke: compliant to to EN 45545 and NFPA 130
Safety-approved to the latest edition of IEC/EN 60950-1
and UL/CSA 60950-1 in process
1
1
Table of Contents
pending
Page
Description ............................................................................ 1
Model Selection .................................................................... 2
Functional Description .......................................................... 3
Electrical Input Data .............................................................. 4
Electrical Output Data ........................................................... 6
Description of Options ......................................................... 8
Page
Electromagnetic Compatibility (EMC) .................................. 9
Immunity to Environmental Conditions .............................. 11
Mechanical Data ................................................................. 12
Safety and Installation Instructions .................................... 13
Accessories ........................................................................ 14
Copyright © 2017, Bel Power Solutions Inc. All rights reserved.
BCD.00791 Rev AD, 4-May-2017
MELCHER
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Page 1 of 15
RCM Series Data Sheet
150 /300 W DC-DC Converters
Model Selection
Table 1: Model Selection
V i min 1
[V]
1
2
Input voltage
Vi cont
[V]
14.4
16.8
(24)
43.2
50.4
14.4
43.2
45
V i max1
[V]
Output
Vo nom Io nom
[V]
[A]
Power
Po nom
[W]
Efficiency
η min2
η typ
[%]
[%]
50.4
12
24
12.5
6.25
150
150
88
89
(110) 137.5
154
12
24
12.5
6.25
150
150
91
92
16.8
(24)
50.4
12
24
25
12.5
300
300
89
90
50.4
(110) 137.5
154
12
24
25
12.5
300
300
91
92
45
92.5
93
93.5
Model
Options
24RCM150-12
24RCM150-24
D, M, Q, F
110RCM150-12
110RCM150-24
D, M, Q, F
24RCM300-12
24RCM30024
D, M, Q, F
110RCM300-12
110RCM300-24
D, M, Q, F
Short time; see table 2 for details
Efficiency at TA = 25 °C, Vi nom, Io nom, Vo nom, only option D fitted
Part Number Description
110 RCM 150 -24 D M Q
Operating input voltage Vi cont (continuously):
16.8 – 45 VDC .......................................................... 24
50.4 – 137.5 VDC .................................................... 110
Series ........................................................................... RCM
Output power:
150 W .................................................................... 150
300 W .................................................................... 300
Nominal output voltage:
12 V .......................................................................... -12
24 V .......................................................................... -24
Auxiliary functions and options:
Out OK, output voltage adjust, shutdown 1 .................. D
Interruption time .......................................................... M
ORing FET ................................................................... Q
Fuse ............................................................................. F
1
Opt. D requires the signal connector.
Note: The sequence of options must follow the order above.
Available combinations of options:
Note: All models are RoHS-compliant for all six substances.
Example: 110RCM150-24DMQ: DC-DC converter, input
voltage range 50.4 to 137.5 V continuously, output
providing 24 V / 6.25 A, monitoring relay, output
voltage adjust, shutdown input, interruption time
10 ms, integrated ORing FET, operating ambient
temperature TA = – 40 to 70 °C, RoHS-compliant
for all six substances.
Product Marking
Type designation, applicable safety approval and recognition
marks, CE mark, pin allocation, and product logo.
BCD.00791 Rev AD, 4-May-2017
24/110RCMxxx-xx
24/110RCMxxx-xxD
24/110RCMxxx-xxDF
24/110RCMxxx-xxDMQ
24/110RCMxxx-xxDMQF
No option
Basic communication model
Industrial version
Railway version
All options
Input voltage range and input current, nominal output voltage
and current, degree of protection, batch no., serial no., and
data code including production site, version (modification
status) and date of production.
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Page 2 of 15
RCM Series Data Sheet
150 /300 W DC-DC Converters
An auxiliary converter supplies all circuits with a stable bias
voltage.
Functional Description
The converters are designed as active clamp forward converters with a switching frequency of approximately 120 kHz.
The built-in high-efficient input filter together with a small input
capacitance generates very low inrush current of short
duration. An antiparallel suppressor diode acts as reverse
polarity protection together with the external circuit breaker or
fuse.
An output ORing FET is available (option Q) and allows for a
redundant power supply system. If there are no external circuit
breakers, it is possible to order the converter with incorporated fuse (opt. F). Because this fuse is not accessible, a
serial diode provides the reverse polarity protection (only with
option F or M).
Opt. D encompasses an additional signal connector and
allows for output voltage adjust and a primary shutdown. An
output voltage monitor controls a relay with a change-over
contact.
The circuitry providing the interruption time (opt. M) is located
after the input filter.
The rectification on the secondary side is provided by synchronous rectifiers, in order to keep the losses as low as
possible. The output voltage control logic is located on the
secondary side and influences the primary logic through
magnetic feedback.
The converter is mounted onto a base plate, which acts as
heat sink. An additional heatsink for air cooling is available as
accessory.
NTC
R–
Primary
control logic
SD
Isolated
driver
SD0
R R
R+
JM194c
OK1
OK2
Secondary
control logic
OK0
Fuse
(option F)
1
Isolation
Vi+
Opt. M
NTC
Opt. Q
Input
filter
+
Chu
Vi–
PE
Vo+
Output
filter
Vo–
Cy
Auxiliary
converter
Cy
Cy
Auxiliary connector (only with option D)
1
Reverse protection diode, only fitted with opt. F or M
Fig. 1
Block diagram
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Page 3 of 15
RCM Series Data Sheet
150 /300 W DC-DC Converters
Electrical Input Data
General Conditions:
– TA = 25 °C, unless TC is specified.
– R input not connected
Table 2a: Input data of RCM150
Input
24RCM150
110RCM150
Unit
Characteristics
Conditions
min
typ
max
min
typ
max
Vi
Operating input voltage
Io = 0 – Io max
TC min – TC max
16.8
(24)
45.0
50.4
(110)
137.5
V i 2s
for ≤ 2 s
without shutdown
14.4
50.4
43.2
V i nom
Nominal input voltage
V i abs
Input voltage limits
3 s without damage
24, 36
0
V
154
72, 96, 110
55
0
165
Ii
Typical input current
Vi nom, Io nom
1.5
Pi 0
No-load input power
Vi min – Vi max, Io = 0
42
6
A
P i SD
Idle input power
Vi min – Vi max, V SD = 0 V
0.7 2
1.5
Ci
Input capacitance 1
Ri
Input resistance
I inr p
Peak inrush current
t inr d
Duration of inrush current
t on
Start-up time at switch on
0 → Vi min, Io nom
Start-up time after removal
of shutdown
Vi min ≥ 16.8 V, Io nom
V SD = 0 → 5 V
10
W
µF
Vi = 137.5 V, Io nom
100
mΩ
20
A
10
ms
1000
1000
300
300
Table 2b: Input data of RCM300
Input
24RCM300
110RCM300
Unit
Characteristics
Conditions
min
typ
max
min
typ
max
Vi
Operating input voltage
Io = 0 – Io max
TC min – TC max
16.8
(24)
45.0
50.4
(110)
137.5
without shutdown
14.4
50.4
43.2
V i 2s
for ≤ 2 s
V i nom
Nominal input voltage
V i abs
Input voltage limits
3 s without damage
Ii
Typical input current
Vi nom, Io nom
3
5
24 (36)
Pi 0
No-load input power
Vi min – Vi max, Io = 0
P i SD
Idle input power
Vi min – Vi max, V SD = 0 V
Ci
Input capacitance 1
Ri
Input resistance
I inr p
Peak inrush current
t inr d
Duration of inrush current
t on
Start-up time at switch on
0 → Vi min, Io nom
Start-up time after removal
of shutdown
Vi min ≥ 16.8 V, Io nom
V SD = 0 → 5 V
1
2
0
V
154
(72) (96) 110
55
0
165
A
W
1
12
µF
mΩ
Vi = 137.5 V, Io nom
A
0
1000
1000
300
300
ms
Not smoothed by the inrush current limiter at start-up (for inrush current calculation)
Typ. value at Vi max. At lower Vi, the idle and low-load input power is smaller.
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Page 4 of 15
RCM Series Data Sheet
150 /300 W DC-DC Converters
Input Transient and Reverse Polarity Protection
A suppressor diode and a symmetrical input filter form an
effective protection against input transients, which typically
occur in most installations, but especially in battery-driven
mobile applications. If the input voltage has the wrong polarity,
an antiparallel diode will cause the external input circuit
breaker or fuse to trip. If the fuse is incorporated (opt. F), a
serial diode prevents reverse current.
Input Under- / Overvoltage Lockout
Vi+
Ri Converter
Vo+
Load
ri
Ci
The efficiency depends on the model and on the input voltage.
110RCM150-12DMQ
JM217
100
Vi = 110 V
Vi = 50 V
Vi = 137 V
80
+
Cext
Efficiency
90
JM085d
Rext
Recommended values for Cext for different batteries are listed
in table 3, which should allow for stable operation up to an input
inductance of 2 mH. Ci is specified in table 2.
η [%]
If the input voltage is out of range, an internally generated
inhibit signal disables the converter to avoid any damage.
Lext
reach stable operating conditions. Worst case conditions are
at lowest Vi and highest output power Po.
70
Vo–
Vi–
60
Fig. 2
Input configuration
0
0.2
0.4
0.6
0.8
Po / Po nom
Fig. 3a
Efficiency versus Vi and Po (110RCM150-12)
Inrush Current and Stability with Long Supply Lines
The converter operates with relatively small input capacitance
C i resulting in low inrush current of short duration.
If a converter is connected to the power source through supply
lines with reasonable length, no additional measures are
necessary to ensure stable operation.
Only in the case of very long supply lines exhibiting a considerable inductance Lext, an additional external capacitor Cext
connected across the input pins improves the stability and
prevents oscillations.
Actually, an RCM Series converter with its load acts as negative
resistor r i, because the input current I i rises, when the input
voltage Vi is decreased. It tends to oscillate with a resonant frequency determined by the line inductance L ex t and the input
capacitance Ci + Cext, damped by the resistor R ext. The whole
system is not linear at all and eludes a simple calculation. One
basic condition is given by the formula:
L • Po max
Ci + Cext > —ext
———
—
—
—
—
—
—
Rext • Vi min²
(
dV i
—— )
ri = —
dI i
η [%]
JM210a
100
Vi = 110 V
Vi = 50 V
90
Vi = 137 V
80
70
60
0
0.2
0.4
0.6
0.8
Po / Po nom
Fig. 3b
Efficiency versus Vi and Po (110RCM150-24)
η [%]
110RCM300-24DMQ
JM218
100
Rext is the series resistor of the voltage source including supply
lines. If this condition is not fulfilled, the converter may not
110RCM150-24DMQ
Vi = 110 V
Vi = 50 V
90
Vi = 137 V
80
Table 3: Recommended values for the capacitor Cext
V B nom
RC150
RCM300
Rated voltage
24 V
1500 µF
3000 µF
40 V
36 V
1000 µF
2000 µF
63 V
72 V
220 µF
440 µF
125 V
110 V
100 µF
200 µF
200 V
BCD.00791 Rev AD, 4-May-2017
70
60
0
0.2
0.4
0.6
0.8
Po / Po nom
Fig. 3c
Efficiency versus Vi and Po (110RCM300-24)
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Page 5 of 15
RCM Series Data Sheet
150 /300 W DC-DC Converters
Electrical Output Data
General Conditions:
– TA = 25°C, unless TC is specified.
– R input not connected
Table 4a: Output data of RCM150
Output
12 V
Characteristics
Conditions
24 V
Unit
min
typ
max
min
typ
max
Vo
Output voltage 1
Vi nom, 0.5 Io nom
11.88
12
12.12
23.76
24
24.24
Vow
Worst case output
voltage
Vi min – Vi max
TC min – TC max, 0 – Io nom
11.64
12.36
23.28
15.8
28.5
Vo droop Voltage droop
–20
Vo P
Overvoltage protection 2
Vo L
Overvoltage shutdown 6
Io nom
Nominal output current
Io L
Output current limit
TC min – TC max
vo
Output
noise 3
Switch. frequ.
Total incl. spikes
Vi nom, Io nom
BW = 20 MHz
Dynamic
load
regulation
Voltage
deviation 5
Vi nom
0.1 ↔ 0.9 Io nom
vo d
t d4
αVo
Recovery time
Temp. coefficient of Vo (NTC)
14.3
15
6.5
V
A
7.2
40
80
60
120
700
1000
–0.02
mV/A
31.5
6.25
14.4
5
0 – Io nom, TC min – TC max
30
28
12.5
13.0
24.72
–40
14
V
mVpp
5
0
– 0.02
0
ms
% /K
Table 4b: Output data of RCM300
Output
12 V
Characteristics
Conditions
min
typ
12
Vo
Output voltage 1
Vi nom, 0.5 Io nom
11.88
Vow
Worst case output
voltage
Vi min – Vi max
TC min – TC max, 0 – Io nom
11.64
24 V
max
min
typ
12.12
23.76
24
12.36
23.28
Unit
max
24.24
Vo droop Voltage droop
mV/A
protection 2
Vo P
Overvoltage
Vo L
Overvoltage shutdown 6
Io nom
Nominal output current
Io L
Output current limit
TC min – TC max
vo
Output
noise 3
Switch. frequ.
Total incl. spikes
Vi nom, Io nom
BW = 20 MHz
vo d
Dynamic
load
regulation
Voltage
deviation 5
Vi nom
0.1 ↔ 0.9 Io nom
t d4
αVo
1
2
3
4
5
6
Recovery time
Temp. coefficient of Vo (NTC)
V
24.72
14.3
15
15.8
28.5
14
31.5
V
28
25
12.5
13.5
A
15
80
mVpp
120
5
0 – Io nom, TC min – TC max
30
– 0.02
5
0
–0.02
0
ms
% /K
If the output voltage is increased above Vo nom through R-input control, the output power should be reduced accordingly, so that Po max
and TC max are not exceeded.
Breakdown voltage of the incorporated suppressor diode at 1 mA . Exceeding this value might damage the suppressor diode.
Measured according to IEC/EN 61204 with a probe described in annex A
Recovery time until Vo returns to ±1% of Vo; see fig. 4.
No overshoot at switch on.
Output overvoltage protection by an electronic circuitry.
BCD.00791 Rev AD, 4-May-2017
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Page 6 of 15
RCM Series Data Sheet
150 /300 W DC-DC Converters
Output Voltage Regulation
Parallel and Series Connection
Line and load regulation of the output is so good that input
voltage and output current have virtually no influence to the
output voltage.
The outputs of max. 5 RCM Series converters may be connected in series without restrictions.
Vo
Vod
Vo ±1 %
Parallel operation is only recommended for redundant systems
(option Q). To ensures proper current sharing, the load lines
should have equal length and section. The output voltage
exhibits a slight droop characteristic, which facilitates current
sharing. In addition, the output voltage tends to be lowered with
increasing temperature.
Vo ±1 %
Vod
td
td
t
Io /Io nom
Redundant Systems
1
0.5
Note: If the sum of the output voltages is greater than 60 V, it
cannot be considered being SELV (Safety Extra Low Voltage)
according to the safety standards.
≥ 10 µs
For redundant systems, we recommend the options Q and D,
see Options.
≥ 10 µs
0
05102c
t
LE D Indicator
The converters exhibit a green LED "Out OK", signaling that
the output voltage is within the specified range.
Fig. 4
Typical dynamic load regulation of output voltage
Thermal Considerations
A temperature protection is incorporated in the primary and
secondary control logic each.
Output Current Limitation
The output is continuously protected against open-circuit (no
load) and short-circuit by an electronic current limitation with
rectangular characteristic; see fig. 5.
Vo
Vo nom
0.98
0.5
JM219
0
0.5
1.0
IoL
Io
Io nom
Fig. 5
Rectangular current limitation of single-output models
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Page 7 of 15
RCM Series Data Sheet
150 /300 W DC-DC Converters
Description of Options
SD and SD0 (= Vi–). If the shutdown function is not required,
pin SD can be left open-circuit. Voltage on pin SD:
Option D: Output Monitor, Output Adjust, Shutdown
Option D consists of several auxiliary functions and encompasses an additional auxiliary connector.
Converter operating:
Converter disabled:
The output response is shown in fig. 7.
Note: In systems consisting of several converters, this feature may
be used to control the activation sequence by logic signals or to
enable the power source to start up, before full load is applied.
Output Voltage Adjust (R)
Note: With open R-input, Vo = Vo nom.
The converter allows for adjusting the output voltage in the
range of 80 to 105% of Vo nom. The adjust is accomplished by
an external resistor R ext1 or R ext2 , connected to the R-input;
see fig. 6.
Depending on the value of the required output voltage, the
resistor shall be connected:
either: Between the R-pin and R– to adjust the output
voltage to a value below Vo nom :
Option M: Interruption Time
The interruption time t hu is specified in the railway standard
Vo /Vo nom
1
0.1
0
Vo
Rext1 ≈ 4 kΩ • ––––––––– – 15.8 kΩ
Vo nom – Vo
Note: Rext1 = 0 Ω reduces Vo to 80%.
(Vo – 2.5 V)
–––––––– – 682kΩ
Rext2 ≈ 4 kΩ • ––––––––––
2.5 V • (Vo /Vo nom – 1)
JM191
Bias
4 kΩ
R
+
Control
logic
Rext1
15.8 kΩ
td on
ton
t off
0
JM193a
t
For less critical applications, option M is not required (class
S1, no interruption time).
R–
Vi–
Option Q: ORing FET for Redundant Systems
Vo–
The outputs of 2 parallel connected converters are separated
with ORing diodes (built by FETs). If one converter fails, the
remaining one must be capable to still deliver the full power to
the load. If more power is needed, the system may be
extended to more parallel converters (n+1 redundancy).
Fig. 6
Output voltage control via R-input
Output Voltage Monitor (D)
The output voltage Vo is monitored. When Vo is in range, a relay
with a change-over contact is activated.
Note: The trigger levels are typ. ±5 % of Vonom (with open R-input).
Data of relay contacts: 0.4 A /150 VDC
Primary Shutdown (SD)
The output of the converter may be enabled or disabled by a
logic signal (e.g. CMOS) applied between the shutdown pin
BCD.00791 Rev AD, 4-May-2017
tf
EN 50155 clause 5.1.1.3: Class S2 is 10 ms. It is measured at
VB nom (nominal battery voltage) for interruption and shortcircuit of the input. After such an event, the system is ready for
the next event after 10 s. Fig. 7 shows the output voltage Vo, if
option M is fitted.
R+
Rext2
Vref = 2.5 V
thu
Fig. 7
Typical output response to the SD-signal. If option M is not
fitted, thu = 0 ms.
Note: Rext2 = 0 Ω increases Vo to 105%.
628 kΩ
tr
SD
1
or: Between the R-pin and R+ to adjust the output voltage to
a value greater than Vo nom :
Vi+
12 to 154 V or open-circuit
– 2 to +2 V
Current sharing must be ensured by load lines of equal
section and length. In addition, a slight droop characteristic of
the output voltage and a negative temperature coefficient are
helpful as well.
To keep the losses as small as possible, the ORing diode is
replaced by a FET. The voltage drop is approx. 22 mV (not
dependent of Io).
Note: In the case of a failing converter, the output voltage is
maintained by the redundant converters. However, the failing item
should be identified and replaced. We recommend the Out OK
function (option D).
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Page 8 of 15
RCM Series Data Sheet
150 /300 W DC-DC Converters
Option F: Incorporated Fuse
Table 5: Recommended for external fuses
The railway standard EN 50155 bans fuses in the converters.
Consequently, the installer must preview an external fuse or
circuit breaker. However, when this is not possible, we offer an
incorporated fuse. This fuse is not accessible and will not trip,
except if the converter is defect.
Note: Converters with option F or option Q are protected against
input reverse polarity by a series diode.
Converter
Fuse specification
Ordering number
24RCM150-12, -24
15 A fast acting
BEL 3AB (P) 15-R
24RCM300-12, -24
25 A fast acting
Littlefuse 0314025
110RCM150-12, -24
5 A fast acting
BEL 3AB (P) 5-R
110RCM300-12, -24
8 A fast acting
BEL 3AB (P) 8-R
Electromagnetic Compatibility (EMC)
Electromagnetic Immunity
Table 6: Electromagnetic immunity (type tests)
Phenomenon
Standard
Level
Coupling
mode 1
Value
applied
Waveform
Source
imped.
Test
procedure
Electrostatic
discharge
(to case)
IEC/ EN
61000-4-2
43
contact discharge
6000 Vp
1/50 ns
air discharge
8000 Vp
330 Ω
150 pF
10 positive and
10 negative
discharges
Electromagnetic
field
IEC/ EN
61000-4-3
x4
antenna
20 V/m
AM 80% / 1 kHz
n.a.
80 – 800 MHz
yes
A
5
antenna
20 V/m
AM 80% / 1 kHz
n.a.
800 – 1000 MHz
yes
A
Electrical fast
transients/burst
IEC/ EN
61000-4-4
Surges
Conducted
disturbances
1
2
3
4
5
6
7
8
10 V/m
1400 – 2000 MHz
5 V/m
2000 – 2700 MHz
3 V/m
5100 – 6000 MHz
In
Perf.
oper. crit.2
yes
A
±2000 Vp
bursts of 5/50 ns
2.5/5 kHz over
15 ms; burst
period: 300 ms
50 Ω
60 s positive
60 s negative
transients per
coupling mode
yes
A
i/c
±2000 Vp
1.2/50 µs
A
±1000 Vp
5 pos. and 5 neg.
surges per
coupling mode
yes
+i/–i
42 Ω
0.5 µF
i, o, signal wires
10 VAC
(140 dBµV)
AM 80%
1 kHz
150 Ω
0.15 – 80 MHz
yes
A
3
capacitive, o/c
36
i/c, +i/–i
direct
IEC/ EN
61000 -4-5
37
IEC/ EN
61000-4-6
38
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
Exceeds EN 50121-3-2:2015 table 6.3
Corresponds to EN 50121-3-2:2015 table 6.1
Corresponds to EN 50121-3-2:2015 table 6.2 (compliance with digital communication devices).
Corresponds to EN 50121-3-2:2015 table 4.2
Covers or exceeds EN 50121-3-2:2015 table 4.3
Corresponds to EN 50121-3-2:2015 table 5.1 (radio frequency common mode).
BCD.00791 Rev AD, 4-May-2017
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Page 9 of 15
RCM Series Data Sheet
150 /300 W DC-DC Converters
Electromagnetic Emissions
The conducted emissions (fig. 9) have been tested according
to EN 55011 (similar to EN 55032, much better values than
requested by EN 50121-3-2:2015, table 1.1). The limits in fig. 8
apply to quasipeak values, which are always lower then peak
values.
Radiated emissions have been tested according to EN 55011
group 1, class A (similar to EN 55032), see EN 50121-32:2015, table 3.1. The test is executed with horizontal and
vertical polarization. The worse result is shown in fig. 9.
dBµV/m
VUS EMC Labatory, 110RCM150-24DMQF; Vi = 110 VDC, Vo = 24 V / 6.25 A
Testdistance 10 m, Class A, 3-Oct-2016; ESVS 30, Rhode & Schwarz
60
JM212
50
40
30
20
10
0
30
110RCM150-24DMQF; Vi = 110 V, Vo = 24 V; Io = 6.25 A
Class A, 3-Oct-2016
dBµV
EN 55011 A qp
JM211
80
EN 55011 A av
60
50
100
200
500
1000 MHz
Fig. 9a
110RCM150-24: Typ. radiated disturbances in 10 m distance
(Vi = 110 V, I i nom, resistive load, quasi peak).
40
dBµV/m
20
VUS EMC Labatory, 300RCM150-24DMQF; Vi = 110 VDC, Vo = 24 V / 12.5 A
Testdistance 10 m, Class A, 21-Apr-2017; ESVS 30, Rhode & Schwarz
60
JM221
50
0
0.2
0.5
1
2
5
10
20 MHz
40
Fig. 8a
110RCM150-24: Typ. disturbance voltage at the input (Vi
= 110 V, Ii nom, resistive load, quasi peak and average)
30
20
10
0
30
110RCM300-24DMQF; Vi = 110 V, Vo = 24 V; Io = 12.5 A
Class A, 20-Apr-2017
dBµV
EN 55011 A qp
JM220
80
EN 55011 A av
60
50
100
200
500
1000 MHz
Fig. 9b
110RCM300-24: Typ. radiated disturbances in 10 m
distance (Vi = 110 V, I i nom, resistive load, quasi peak).
40
20
0
0.2
0.5
1
2
5
10
20 MHz
Fig. 8b
110RCM300-24: Typ. disturbance voltage at the input (Vi
= 110 V, Ii nom, resistive load, quasi peak and average)
BCD.00791 Rev AD, 4-May-2017
MELCHER
The Power Partners.
Page 10 of 15
RCM Series Data Sheet
150 /300 W DC-DC Converters
Immunity to Environmental Conditions
Table 7: Mechanical and climatic stress. Air pressure 800 – 1200 hPa
Test method
Standard
Test conditions
Db
Damp heat test,
cyclic
EN 50155:2007, clause 12.2.5
IEC/EN 60068-2-30
Temperature:
Cycles (respiration effect):
Duration:
55 °C and 25 °C
2
2× 24 h
Converter
not
operating
Bd
Dry heat test
steady state
EN 50155:2007, clause 12.2.4
IEC/EN 60068-2-2
Temperature:
Duration:
70 °C
6h
Converter
operating
Ad
Cooling test
steady state
EN 50155:2007, clause 12.2.3
IEC/EN 60068-2-1
Temperature, duration
Performance test
–40 °C, 2 h
+25 °C
Conv. not
operating
--
Low temperature
storage test
EN 50155:2007, clause 12.2.14
IEC/EN 60068-2-1
Temperature, duration
then start-up
–40 °C, 16 h
Conv. not
operating
Ka 1
Salt mist test
sodium chloride
(NaCl) solution
EN 50155:2007, clause 12.2.10
IEC/EN 60068-2-11
class ST2
Temperature:
Duration:
35 ±2 °C
16 h
Converter
not
operating
--
Shock
EN 50155:2007 clause 12.2.11
EN 61373 sect. 10, class B,
body mounted 1
Acceleration amplitude:
Bump duration:
Number of bumps:
5.1 gn
30 ms
18 (3 in each direction)
Converter
operating
--
Simulated long life
testing at
increased random
vibration levels
EN 50155:2007 clause 12.2.11
EN 61373 sect. 8 and 9,
class B, body mounted 2
Acceleration spectral density:
Frequency band:
Acceleration magnitude:
Test duration:
0.02 g n2 /Hz
5 – 150 Hz
0.8 gn rm s
15 h (5 h in each axis)
Converter
operating
1
2
Status
This test is is in preparation (not mandatory in EN 50155).
Body mounted = chassis of a railway coach
Temperatures
Table 8: Temperature specifications, valid for an air pressure of 800 – 1200 hPa (800 – 1200 mbar)
Temperature
EN 50155 Class TX
Characteristics
TA
Ambient temperature
Case temperature
TS
Storage temperature
2
min
max
10 minutes
Converter operating 1
–40
70
85
–40
84
Not operational
–55
85
2
TC
1
Conditions
Unit
°C
Over temperature shutdown
Measured at the measurement point TC; see Mechanical Data.
Reliability
Table 9: MTBF and device hours
Ratings at specified
case temperature
between failures 1
Model
Accord. to IEC 62380
110RCM150-24
1
MTBF
Demonstrated hours
Statistical values, based upon an average of 4300 working hours per year and in general field use over 5 years; upgrades and
customer-induced errors are excluded.
BCD.00791 Rev AD, 4-May-2017
MELCHER
The Power Partners.
Page 11 of 15
RCM Series Data Sheet
150 /300 W DC-DC Converters
Mechanical Data
Dimensions in mm.
European
Projection
75.45
68.2
40.9
29.5
11.15
JM205a
11.7
6.1
∅
∅4
4x)
5
Measuring
point of case
temperatureTC
(4
x)
48
Measuring
point of case
temperatureTC
76.25
78
98
96
116
Fig. 10
Case RCM01, weight approx. 520 g,
Aluminum, EP-powder coated
BCD.00791 Rev AD, 4-May-2017
188.6
176.6
121.9
164.5
152.5
94.9
6
6
.5 (
4.
12
7
36.1
38
JM203a
Fig. 11
Case RCM02, weight approx. 820 g,
Aluminum, EP-powder coated
MELCHER
The Power Partners.
Page 12 of 15
RCM Series Data Sheet
150 /300 W DC-DC Converters
Safety and Installation Instruction
Installation Instruction
Connectors and Pin Allocation of RCM150
- Input connector, 3 pins: Wago 236-403: Vi+, Vi–, PE;
recommended wire section: 1.5 – 2.5 mm 2, 16 – 12 AWG
- Output connector, 2 pins: Wago 236-402: Vo+, Vo–;
recommended wire section: 1.5 – 2.5 mm 2, 16 – 12 AWG
- Auxiliary connector: Phoenix Contact 1713883;
recommended wire section: 0.2 – 1.5 mm 2, 24 – 16 AWG;
pin allocation see fig. 12.
These converters are components, intended exclusively for
inclusion by an industrial assembly process or by a
professionally competent person. Installation must strictly
follow the national safety regulations in respect of the
enclosure, mounting, creepage distances, clearances,
markings and segregation requirements of the end-use
application.
Connection to the system shall only be effected with cables
with suitable section (primary and secondary connector in
cage clamp technique).
The auxiliary connector shall be connected via the suitable
female connector; see Accessories.
No fuse is incorporated in the converter (except for option F).
An external circuit breaker or a fuse in the wiring to one or both
input pins.
Vi–
Vi+
PE
R+.
R–
n.c.
OK1
OK2
n.c.
SD
R
R
n.c.
OK
OK
n.c.
SD0
Vo+
Vo–
Other installation methods may not meet the safety
requirements. Check that PE is safely connected to protective
earth.
Fig. 12
Pin allocation of RCM150
Do not open the converters, or the warranty will be invalidated.
Make sure that there is sufficient airflow available for
convection cooling and that the temperature of the bottom
plate is within the specified range. This should be verified by
measuring the case temperature at the specified measuring
point, when the converter is operated in the end-use
application. TC max should not be exceeded. Ensure that a
failure of the converter does not result in a hazardous
condition.
Connectors and Pin Allocation of RCM300
- Input connector, 3 pins: Wago 745-353: Vi–, Vi+, PE
recommended wire section: 2.5 – 6 mm 2, 14 – 10 AWG
- Output connector, 2 pins: Wago 745-602/006, Vo–, Vo+
recommended wire section: 2.5 – 16 mm 2, 14 – 6 AWG
- Auxiliary connector: Phoenix Contact 1713883;
recommended wire section: 0.2 – 1.5 mm 2, 24 – 16 AWG;
pin allocation see fig. 13.
Standards and Approvals
The RCM Series converters are approved according to the
safety standards IEC/EN 60950-1 and UL/CSA 60950-1 2nd
Ed.
• Class I equipment
• Building in
• Double or reinforced insulation based on 250 VAC or 240
VDC between input and output, and between input and the
relay contacts (OK0, OK1, OK2).
• Pollution degree 2 environment
Vi–
Vi+
PE
R+.
R–
n.c.
OK1
OK2
n.c.
SD
R
R
n.c.
OK
OK
n.c.
SD0
Vo–
Vo+
They have been evaluated for:
The converters are subject to manufacturing surveillance in
accordance with the above mentioned UL standards and with
ISO 9001:2008.
Fig. 13
Pin allocation of RCM300
Table 10: Isolation
Characteristic
output 1
Electric
strength
test
Input to
case + output
Output
to case
input
OK contacts to
case
outputs
Unit
Factory test >1 s
4.2
2.86
1.0
2.86
2.86
2.86
kVDC
AC test voltage equivalent
to actual factory test
3.0
2.0
0.7
2.0
2.0
2.0
kVAC
Insulation resistance
>300 2
>300 2
>100
>300
>300
>300
MΩ
Creepage distances
5.0
3.5
1.5
3.5
3.5
3.5
mm
1
2
Pretest of subassemblies in accordance with IEC/EN 60950
Tested at 500 VDC
BCD.00791 Rev AD, 4-May-2017
MELCHER
The Power Partners.
Page 13 of 15
RCM Series Data Sheet
150 /300 W DC-DC Converters
Cleaning Liquids and Protection Degree
The converters are not hermetically sealed. In order to avoid
possible damage, any penetration of liquids shall be avoided.
The converters correspond to protection degree IP 30 for
RCM150 and IP 20 for RCM 300.
Railway Applications
The RCM Series converters have been designed observing
the railway standards EN 50155:2007 and EN 50121-32:2015. All boards are coated with a protective lacquer.
The converters comply with the fire & smoke standard EN
45545, HL1 to HL3.
Voltage Withstand Test
The electric strength test is performed in the factory as routine
test in accordance with EN 50514 and IEC/EN 60950 and
should not be repeated in the field. The Company will not
honor warranty claims resulting from incorrectly executed
electric strength tests.
BCD.00791 Rev AD, 4-May-2017
MELCHER
The Power Partners.
Page 14 of 15
(15)
Accessories
3.7
Female Connector
4.7
0
10.2
RCM300
175.8
181.3
186
JM223
(98)
12 6 0
A suitable female connector is available.
15.7
RCM Series Data Sheet
150 /300 W DC-DC Converters
104
R 4 110 98
Fig. 14
Female connector 14 pins, HZZ00145-G
Additional Heatsink
(176.6)
4.2
R
5
A suitable heat sink for air cooling is available,
if cooling by wall or a chassis mounting is not
possible; see fig. 15 and fig. 16.
Ø
5.65
0
10.2
RCM150
158.15
153.6
163.8
JM222
Ø 4.2
7
5.
(152.5)
R
R 2 90
.5
84
78
(78)
12 6 0
3.7
12
Fig. 16
Additional heatsink for RCM 300 (HZZ00148-G)
Fig. 15
Additional heatsink for RCM 150 (HZZ00147-G)
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 © 2017, Bel Power Solutions Inc. All rights reserved.
BCD.00791 Rev AD, 4-May-2017
MELCHER
The Power Partners.
www.belpowersolutions.com
Page 15 of 15
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