RCM150/300 Series
150/300 W DC-DC Converters
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, 15 or 24 V. The
converters are designed for chassis mounting and exhibit
a closed housing with cooling openings.
Many options are available, such as an output ORing
FET for redundant operation, output voltage adjustment,
interruption time of 10 ms (class S2), shutdown input, and
an output voltage monitor controlling a relay (change-over
contact).
FEATURES
®
• RoHS lead-free-solder product
• 2 input voltage ranges, covering all railway batteries
• Single output 12, 15 or 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
• Dimensions:
RCM150 96 x 36.1 x 164.5 mm (3.78 x 1.42 x 6.48 in)
RCM300 116 x 38 x 188.6 mm (4.57 x 1.5 x 4.43 in)
• Compliant to EN 50155, EN 50121-3-2, AREMA
• Fire and smoke: compliant to EN 45545 and NFPA 130
• 5 year warranty
• Safety-approved to IEC/EN 62368-1 and UL/CSA 62368-1
Table of Contents
Description........................................................................................1
Model Selection.................................................................................2
Functional Description.......................................................................3
Electrical Input Data..........................................................................4
Electrical Output Data.......................................................................7
Description of Options.......................................................................9
Electromagnetic Compatibility (EMC)..............................................12
Immunity to Environmental Conditions............................................14
Mechanical Data..............................................................................15
Safety and Installation Instructions..................................................16
Accessories.....................................................................................18
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RCM Series
150 / 300 W DC-DC Converters
MODEL SELECTION
Table 1: Standard models
Input voltage
V
[V]
Vi cont
[V]
1
i min
14.4
43.2
Output
16.8
50.4
(24)
(110)
Vi max
[V]
45
1
52.5
137.5
154
14.4
16.8
(24)
45
52.5
43.2
50.4
(110)
137.5
154
Power
Efficiency 2
Model
Vo nom
[V]
Io nom
[A]
Po nom
[W]
η min
12
12.5
150
88
90
24RCM150-12
15
10.0
150
90
91
24RCM150-15
24
6.25
150
90
91
24RCM150-24
12
12.5
150
91
92.5
110RCM150-12
15
10.0
150
91
92.5
110RCM150-15
24
6.25
150
92
93
110RCM150-24
12
25
300
89
90.5
24RCM300-12
24
12.5
300
90
91
24RCM300-24
12
25
300
91
92.5
110RCM300-12
24
12.5
300
92
93.5
110RCM300-24
1
Short time; see table 2 for details.
2
Efficiency at TA = 25 °C, Vi nom, Io nom, Vo nom, only option D fitted.
Options
η typ
[%]
D, M, Q, F, K
Part Number Description
110 RCM 150 -24 D M Q F K
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
15 V............................................................................-15
24 V............................................................................-24
Auxiliary functions and options:
Out OK, output voltage adjust, shutdown 1 ................... D
Interruption time............................................................M
ORing FET....................................................................Q
Fuse built-in....................................................................F
Pluggable Connectors .................................................. K
1
Opt. D requires the auxiliary connector.
Note: The sequence of options must follow the order above.
Note: All models are RoHS-compliant for all six substances.
Available combinations of options:
24/110RCMxxx-xx (K)
24/110RCMxxx-xxD (K)
24/110RCMxxx-xxDF (K)
24/110RCMxxx-xxDMQ (K)
24/110RCMxxx-xxDMQF (K)
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.
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Page 2 of 18
RCM Series
150 / 300 W DC-DC Converters
Product Marking
Type designation, applicable safety approval and recognition marks, CE mark, pin allocation, and product logo.
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.
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
diode acts as reverse polarity protection together with the external circuit breaker or fuse.
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.
An auxiliary converter supplies all circuits with a stable bias voltage.
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 reverse polarity protection (only with option F or M).
Opt. D encompasses an additional auxiliary connector and allows for output voltage adjust and a primary shutdown. An output
voltage monitor controls a relay with a change-over contact.
R–
Isolated
driver
NTC
Fuse
(option F)
1
Opt. M
Input
filter
Chu
Vi–
Cy
PE
Isolation
SD0
2
R+
JM194f
OK1
Primary
control logic
SD
Vi+
R R
Secondary
control logic
OK2
3
OK0
NTC
Opt. Q
+
Auxiliary
converter
Vo+
Output
filter
Vo–
Cy
Cy
Auxiliary connector (only with option D)
¹ Series diode, only fitted with opt. F or M
² Bipolar suppressor diode with opt. F or M
³ Relay contact shown under normal operating conditions
and output voltage under regulation
Fig. 1
Block diagram
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Page 3 of 18
RCM Series
150 / 300 W DC-DC Converters
ELECTRICAL INPUT DATA
General conditions:
- TA = 25 °C, unless TC is specified.
Table 2a: Input data of RCM150 models
Model
Characteristics
24RCM150
110RCM150
Unit
Conditions
min
typ
max
min
typ
max
(24)
45.0
50.4
(110)
137.5
52.5
43.2
Vi cont
Operating input voltage continuous
Io = 0 – Io max
TC min – TC max
16.8
Vi 2s
for ≤ 2 s
without shutdown
14.4
Vi nom
Nominal input voltage
Vi abs
Input voltage limits
3 s without damage
Ii
Typical input current
Vi nom, I o nom
6.8
Pi 0
No-load input power
Vi min – Vi max, Io = 0
2.5
4
42
6
P i SD
Idle input power
Vi min – Vi max, VSD = 0 V
0.7
1.5
0.7 2
1.5
Ci
Input capacitance 1
Ri
Input resistance
100
100
mΩ
Iinr p
Peak inrush current
75
100
A
tinr d
Duration of inrush current
Start-up time
ton
Start-up time after removal of shutdown
24, (36)
0
55
0
0 → Vi min, P o nom
Vi min, P o nom
VSD = 0 → 5 V
V
165
1.5
40
Vi = Vi max, P o nom
154
(72), (96), 110
A
W
10
µF
0.5
0.5
1000
1000
300
300
ms
Table 2b: Input data of RCM300 models
Model
Characteristics
24RCM300
min
typ
max
min
typ
max
(24)
45.0
50.4
(110)
137.5
52.5
43.2
Operating input voltage continuous
Io = 0 – Io max
TC min – TC max
16.8
Vi 2s
for ≤ 2 s
without shutdown
14.4
Vi nom
Nominal input voltage
Vi abs
Input voltage limits
3 s without damage
Ii
Typical input current
Vi nom, I o nom
Pi 0
No-load input power
Vi min – Vi max, Io = 0
P i SD
Idle input power
Vi min – Vi max, VSD = 0 V
Ci
Input capacitance 1
Ri
Input resistance
Iinr p
Peak inrush current
tinr d
Duration of inrush current
Start-up time
1
2
Start-up time after removal of shutdown
Unit
Conditions
Vi cont
ton
110RCM300
24, (36)
0
55
0
165
32
6
4
2
1.5
6
Vi = Vi max, P o nom
0 → Vi min, P o nom
Vi min, P o nom
VSD = 0 → 5 V
V
(72), (96), 110
13.9
4
154
A
6
W
1.5
12
µF
140
140
mΩ
120
150
A
0.5
0.5
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 are smaller.
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RCM Series
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 many
installations, but especially in battery-driven mobile applications.
If the input voltage has the wrong polarity, the incorporated antiparallel diode causes the external input circuit breaker or fuse to
trip. With option M or F (incorporated fuse), an active reverse-polarity protection circuit prevents from any damage.
Input Under- / Overvoltage Lockout
If the input voltage is out of range, an internally generated inhibit signal disables the converter to avoid any damage.
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; see fig. 2.
Table 3: Recommended values for the capacitor Cext
JM085d
Lext
Rext
Vi+
Ri Converter
Vo+
Cext
Ci
Load
+
ri
Vi–
Vo–
Vi nom
RCM150
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
Fig. 2
Input configuration
Actually, the 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:
Lext • Po max dV i
_________
____
C i + C ext >
(r =
)
Rext • Vi min²
i dI i
Rext is the series resistor of the voltage source including supply lines. If this condition is not fulfilled, the converter may not reach
stable operating conditions. Worst case conditions are at lowest Vi and highest output power Po.
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.
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Page 5 of 18
RCM Series
150 / 300 W DC-DC Converters
Efficiency
The efficiency depends on the model and on the input voltage.
η [%]
η [%]
110RCM150-12DMQ
JM217
100
Vi = 110 V
Vi = 50 V
90
JM210b
100
Vi = 110 V
Vi = 50 V
90
Vi = 137 V
80
Vi = 137 V
80
70
60
110RCM150-24DMQ
70
0
0.2
0.4
0.6
Po / Po nom
0.8
Fig. 3a
Efficiency versus Vi and Po (110RCM150-12DMQ)
η [%]
60
0
0.2
0.4
0.6
0.8
Po / Po nom
Fig. 3b
Efficiency versus Vi and Po (110RCM150-24DMQ)
110RCM300-24DMQ
JM218
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.
Fig.3c
3c
Efficiency versus Vi and Po (110RCM300-24DMQ)
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Page 6 of 18
RCM Series
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 models.
Output
12 V
Characteristics
24 V
Unit
min
typ
max
min
typ
max
min
typ
max
Vo
Output voltage 1
Vi nom, 0.5 Io nom
11.88
12
12.12
14.85
15.00
15.15
23.76
24
24.24
V ow
Worst case output voltage
Vi min – Vi max
TC min – TC max, 0 - Io nom
11.64
12.36
14.55
15.45
23.28
V o droop
Output voltage droop
- 20
- 30
- 40
Vo L
Overvoltage shutdown 6
14
17.5
28
Vo P
Overvoltage protection 2
Io nom
Nominal output current
Io L
Output current limit
vo
Output noise 3
vod
Conditions
15 V
14.3
Total incl. spikes
Voltage deviation 5
td 4
Dynamic load
regulation
α vo
Temperature coefficient of vo (NTC)
Recovery time
15.8
17.8
19.8
12.5
TC min – TC max
Switching frequency
15
13.0
28.5
10.0
15
10.4
mV/A
30
6.25
12.0
6.5
60
70
100
120
Vi nom ,
0.1 ↔ 0.9 Io nom
700
800
1000
5
80
5
0
- 0.02
A
7.2
50
- 0.02
V
31.5
Vi nom, Io nom
BW = 20 MHz
0 - Io nom, TC min – TC max
V
24.72
mVpp
5
0
ms
- 0.02
0
%/K
Table 4b: Output data of RCM300 models.
Output
12 V
Characteristics
Conditions
max
min
typ
max
12
12.12
23.76
24
24.24
12.36
23.28
Output voltage 1
V i nom, 0.5 Io nom
11.88
V ow
Worst case output voltage
Vi min – Vi max
TC min – TC max, 0 - Io nom
11.64
V o droop
Output voltage droop
Overvoltage shutdown 6
Vo P
Overvoltage protection 2
Io nom
Nominal output current
Io L
Output current limit
vo
Output noise 3
vod
14.3
Switching frequency
Total incl. spikes
Voltage deviation 5
td 4
Dynamic load
regulation
α vo
Temperature coefficient of vo (NTC)
Recovery time
24.72
- 20
- 40
14
28
15
15.8
28.5
30
25
TC min – TC max
27
30
13.5
80
120
Vi nom ,
0.1 ↔ 0.9 Io nom
1000
1200
V
A
80
5
- 0.02
31.5
15
60
V
mV/A
12.5
V i nom, Io nom
BW = 20MHz
0 - Io nom, TC min – TC max
Unit
typ
Vo
Vo L
24 V
min
mVpp
5
0
- 0.02
ms
0
%/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.
2
Breakdown voltage of the incorporated suppressor diode at 1 mA . Exceeding this value might damage the suppressor diode.
3
Measured according to IEC/EN 61204 with a probe described in annex A
4
Recovery time until Vo returns to ±1% of Vo; see fig. 4.
5
No overshoot at switch on.
6
Output overvoltage protection by an electronic circuitry.
1
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Page 7 of 18
RCM Series
150 / 300 W DC-DC Converters
Output Voltage Regulation
Line and load regulation of the output is so good that input voltage and output current have virtually no influence to the output voltage.
Vo
Vod
Vo ±1 %
Vo ±1 %
Vod
td
td
t
Io /Io nom
1
0.5
≥ 10 µs
≥ 10 µs
0
05102c
t
Fig. 4
Typical dynamic load regulation of output voltage
Thermal Considerations and Protection
A temperature protection is incorporated in the primary and secondary control logic each. It generates an internal inhibit signal, which
disables the converter in case of overtemperature. The converter automatically recovers, when the temperature drops below the
limit. See fig. 5. The relationship between TA and TC depends heavily upon the conditions of operation and integration into a system.
Caution: The installer must ensure that under all operating conditions TC remains within the limits stated in table 8.
Po [W]
RCM300
300
Convection
cooling
240
180
RCM150
120
TC max
60
JM245
0
50
60
70
80
90
100
TA [°C]
Fig. 5
Typical output power derating vs. temperature; vertical
mounting position, free convection cooling
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. 6.
Vo
Vo nom
0.98
0.5
0
JM219
0.5
1.0
IoL
Io
Io nom
Fig. 6
Rectangular current limitation
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Page 8 of 18
RCM Series
150 / 300 W DC-DC Converters
Series and Parallel Connection
The outputs of several RCM Series converters may be connected in series.
Note: If the sum of the output voltages is greater than 60 V, it cannot be considered as ES1 (Electrical energy source class 1) according to
the safety standards.
Several RCM models of the same type can be operated in parallel connection. 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.
Redundant Systems
For redundant systems, we recommend the options Q and D, see Options.
LE D Indicator
The converters exhibit a green LED “Out OK”, signaling that the output voltage is within the specified range.
DESCRIPTION OF OPTIONS
Option D: Output Monitor, Output Adjust, Shutdown
Option D consists of several auxiliary functions and encompasses an additional auxiliary connector.
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 Rext1 or Rext2, connected to the R-input; see fig. 7.
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 :
Vo
–
Rext1 ≈ 4 kΩ • –––––––––
V
– Vo 15.8 kΩ
o nom
Note: Rext1 = 0 Ω reduces Vo to 80%.
or: Between the R-pin and R+ to adjust the output voltage to a value greater than Vo nom :
(Vo – 2.5 V)
Rext2 ≈ 4 kΩ • –––––––––––––––––– – Ra
2.5 V • (Vo /Vo nom – 1)
Note: Rext2 = 0 Ω increases Vo to 105%.
Ra = 300 kΩ for Vo nom = 12 V
Ra = 390 kΩ for Vo nom = 15 V
Ra = 680 kΩ for Vo nom = 24 V
JM244
Vi+
Ra
Bias
Vref = 2.5 V
+
R+
Rext2
4 kΩ
R
Control
logic
Vi–
15.8 kΩ
Rext1
R–
Vo–
Fig. 7
Output voltage control via R-input
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RCM Series
150 / 300 W DC-DC Converters
Output Voltage Monitor (D)
The output voltage Vo is monitored. When Vo is in range, a relay with a change-over contact is activated, connecting OK0 with OK1.
Note: The trigger levels are typ. ±5 % of Vo nom (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 SD and
SD0 (= Vi–). If the shutdown function is not required, pin SD can be left open-circuit. Voltage on pin SD:
Converter operating:
Converter disabled:
12 to 154 V or open-circuit
– 2 to +2 V
The output response is shown in fig. 8a.
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.
Vo /Vo nom
1
0.1
0
tr
tf
td on
ton
t off
SD
1
0
t
Fig. 8a
Typical output response to the SD-signal.
Option M: Interruption Time
The interruption time t hu is specified in the railway standard EN 50155:2021 clause 5.2.4. It is tested at the nominal battery voltage
for interruption and short-circuit of the input. After such an event, the system is ready for another such event after 10 s. Fig. 8b
shows the output voltage Vo with option M.
t hu = 10 ms (Class S2) in all other cases.
For less critical applications, option M is not required (class S1, no interruption time).
Vo /Vo nom
1
tr
thu
td on
0.1
0
ton
Vi
0
t
Fig. 8b
Typical output response to Vi If option M is not fitted, thu = 0 ms.
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Page 10 of 18
RCM Series
150 / 300 W DC-DC Converters
Option Q: ORing FET for Redundant Systems
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).
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).
Option F: Incorporated Fuse
The railway standard EN 50155 disadvises fuses in the converters. Consequently, the installer must preview an external fuse or
circuit breaker. However, when this is not possible, an incorporated fuse is available (option F). This fuse is not accessible and will
not trip, except if the converter is defect.
Note: Converters with option F or option M are protected against input reverse polarity by a series diode.
Table 5: Recommended external fuses (same as with option F)
Converter
Specification
Ordering number
24RCM150
15 A fast acting
BEL 0ADE (P) 9150
24RCM300
30 A fast acting
BEL 0ADE (P) 9300
110RCM150
5 A fast acting
Littelfuse 0507 005.MXEP
110RCM300
8 A fast acting
Littelfuse 0507 008.MXEP
Option K: Pluggable Connectors
This option allows the use of pre-assembled pluggable connectors; for details see Accessories.
Note: Female connectors must be ordered separately.
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Page 11 of 18
RCM Series
150 / 300 W DC-DC Converters
ELECTROMAGNETIC COMPATIBILITY (EMC)
Electromagnetic Immunity
Table 6: Electromagnetic immunity (type tests). Corresponds or Exceeds EN50121-3-2:2016 and AREMA
Phenomenon
Standard
Level
Electrostatic
discharge (to case)
IEC/EN
61000-4-2
4
Electromagnetic
field
IEC/EN
61000-4-3
x
Coupling mode 1
Value
applied
contact discharge
6000 Vp
air discharge
8000 Vp
antenna
20 V/m
Waveform
1/50 ns
AM 80% / 1 kHz
Source
imped.
Test procedure
330 Ω
150 pF
N/A
20 V/m
antenna
20 V/m 3
5 V/m
IEC/EN
61000-4-4
3
3
Surges
IEC/EN
61000-4-5
3
Conducted
disturbances
IEC/EN
61000-4-6
3
Power frequency
magnetic field
IEC/EN
61000-4-8
3
1
2
3
capacitive, o/c
i/c, +i/–i
direct coupling
±2000 Vp
i/c
±2000 Vp
+i/– i
±1000 Vp
i/c, +i/–i
±2000 Vp
i, o, signal wires
10 VAC
(140 dBµV)
Perf.
crit. 2
10 pos. & 10
neg. discharges
yes
A
80 – 800 MHz
yes
A
yes
A
60 s positive
60 s negative
transients per
coupling mode
yes
A
5 pos. & 5 neg.
surges per
coupling mode
yes
0.15 – 80 MHz
yes
A
60 s in all 3 axis
yes
A
800 – 1000 MHz
AM 80% / 1 kHz
N/A
3 V/m
Electrical fast
transients/burst
In
oper.
1400 – 2000 MHz
2000 – 2700 MHz
5100 – 6000 MHz
bursts of 5/50 ns;
2.5/5 kHz over 15 ms;
burst period: 300 ms
50 Ω
42 Ω
0.5 μF
1.2 / 50 µs
12 Ω
9 μF
AM 80% / 1 kHz
150 Ω
300 A/m
A
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
Tested value 20 V/m is required by AREMA; 10 V/m is valid for EN50121-3-2
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Page 12 of 18
RCM Series
150 / 300 W DC-DC Converters
Electromagnetic Emissions
All conducted emissions (fig. 9) have been tested as per EN 55011, group 1, class A. These limits are much stronger than
requested in EN 50121-3-2:2016, table 2.1, and coincide with EN 50121-4:2016, table 1.1. The values in fig. 9 are quasipeak values,
which are always lower then peak values.
The average values must respect a margin of 10 dBµV below the limits for quasipeak.
Radiated emissions have been tested according to EN 55011, group 1, class A . These limits are similar to the requirements of
EN 50121-3-2:2016 and EN 50121-4:2016, both calling up EN 61000-6-4+A1:2011, table 1. The tests were executed with horizontal
and vertical polarization. The worse result is shown in fig. 10.
Note: The highest frequency of the internal sources of EUT is less than 108 MHz. Hence, Radiated Measurement was made up to 1 GHz.
Non-accredited measurement up to 6 GHz are available on request.
dBµV
110RCM150-24DMQF; Vi = 110 V, Vo = 24 V; Io = 6.25 A
Class A, 3-Oct-2016
EN 55011 A av
60
80
40
20
20
0.2
0.5
1
2
5
10
20 MHz
Fig. 9a
110RCM150-24: Typ. disturbance voltage at the input
(Vi = 110 V, Ii nom, resistive load, quasi peak and average)
dBµV/m
60
EN 55011 A av
0
0.2
JM212
0.5
1
2
5
10
20 MHz
Fig. 9b
110RCM300-24: Typ. disturbance voltage at the input
(Vi = 110 V, Ii nom, resistive load, quasi peak and average)
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
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
JM221
50
50
40
40
30
30
20
20
10
10
0
EN 55011 A qp
60
40
0
110RCM300-24DMQF; Vi = 110 V, Vo = 24 V; Io = 12.5 A
Class A, 20-Apr-2017
JM220
EN 55011 A qp
JM211
80
dBµV
30
50
100
200
500
1000 MHz
Fig. 10a
110RCM150-24: Typ. radiated disturbances in 10 m
distance (Vi = 110 V, I i nom, resistive load, quasi peak).
0
30
50
100
200
500
1000 MHz
Fig. 10b
110RCM300-24: Typ. radiated disturbances in 10 m
distance (Vi = 110 V, I i nom, resistive load, quasi peak).
dBµV/m
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Testdistance 10 m, Class A, 21-Apr-2017; ESVS 30, Rhode & Schwarz
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Page 13 of 18
RCM Series
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
Ad
Low temperature
start-up test
EN 50155:2021, clause 13.4.4
IEC/EN 60068-2-1
Temperature, duration:
- 40 °C, 2 h
Performance test:
+25 °C
Dry heat test,
cycle A
EN 50155:2021, clause 13.4.5
IEC/EN 60068-2-2
Temperature:
70 °C
Duration:
6h
Cyclic damp heat
test
EN 50155:2021, clause 13.4.8
IEC/EN 60068-2-30
Temperature:
55 °C and 25 °C
Cycles (respiration effect):
2
Duration:
2x 24 h
Be
Db 2
Ka
-
-
-
Not operating
Temperature:
35 ±2 °C
Duration:
48 h
Functional random
vibration test
EN 50155: 2021, clause 13.4.10.4
EN 61373:2010 clause 8,
class B, body mounted 1
Acceleration amplitude:
0.1 gn = 1.01 m/s2
Frequency band:
5 – 150 Hz
Test duration:
30 min (10 min in each axis)
Simulated long life
testing
EN 50155: 2021, clause 13.4.10.2
EN 61373:2010 clause 9,
class B, body mounted 1
Acceleration amplitude:
0.58 gn = 5.72 m/s2
Frequency band:
5 – 150 Hz
Test duration:
15 h (5 h in each axis)
EN 50155: 2021, clause 13.4.10.3
EN 61373:2010 clause 10,
class B, body mounted 1
Acceleration amplitude:
5.1 g n
Bump duration:
30 ms
Number of bumps:
18 (3 in each direction)
AREMA Part. 11.5.1
class C, D, E, I, J
Displacement amplitude:
0.3” (5 – 10 Hz)
0.07” (5 – 20 Hz)
Acceleration amplitude:
1.5 gn = 14.7 m/s2 (10 – 200 Hz)
Frequency:
5 – 200 Hz
Test duration:
12 h (4 h in each axis)
Acceleration amplitude:
10 g n = 98 m/s2
Bump duration:
11 ms
Number of bumps:
18 (3 in each direction)
Mechanical shock
1
Operating
perf. crit. A
EN 50155: 2021, clause 13.4.13
IEC/EN 60068-2-11
Vibration
sinusoidal
-
Not operating
Salt mist test
sodium chloride
(NaCl) solution
Shock test
-
Status
AREMA Part. 11.5.1
class C, D, E, I, J
Converter not
operating
Operating
perf. crit. A
Not operating
Operating
perf. crit. A
Operating
perf. crit. A
Operating
perf. crit. A
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
Characteristics
TA
Ambient temperature
TC
Case temperature 1
TS
Storage temperature
1
EN 50155:2021 Class OT4
Unit
Conditions
min
max
10 minutes
Converter operating
- 40
70
85
- 40
90
- 55
85
Not operational
°C
Measured at the measurement point TC (see Mechanical Data)
Reliability
Table 9: MTBF
Calculation method
Model
MTBF
According to IEC 61709 / SN-29500
24 / 110RCM150-12 / -15 / -24
1 220 000 h
24 / 110RCM300-12 / -24
1 030 000 h
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Page 14 of 18
RCM Series
150 / 300 W DC-DC Converters
MECHANICAL DATA
(4x
)
ø
48
4.
5
(4
x)
Measuring
point of case
temperatureT
76.45
C
12
Measuring
point of case
temperatureTC
6
6
ø 4
.5
No Paint Zone
for ground screw
ø 10 mm
188.6
176.6
12
121.9
164.5
152.5
94.9
No Paint Zone
for ground screw
ø 10 mm
78
98
96
116
68.2
29.5
75.45
11.7
40.9
11.15
JM205b
38
Standard
models
RCM300
6.1
7
36.1
Standard
models
RCM150
67.5
74.5
29.5
40.9
11
13.1
38
RCM300
with
option K
7
6.3
36.1
RCM150
with
option K
Fig. 11a
Case of RCM150 (RCM01)
weight approx. 520 g, Aluminum, EP-powder coated
pluggable
connector
JM246
pluggable
connector
6
6.4
JM247
Fig. 12a
Case of RCM300 (RCM02)
weight approx. 820 g, Aluminum, EP-powder coated
5.9
Fig. 11b
Plugged connector for RCM150 with option K
17.7
Fig. 12b
Plugged connector for RCM300 with option K
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Page 15 of 18
RCM Series
150 / 300 W DC-DC Converters
SAFETY AND INSTALLATION INSTRUCTION
Connectors and Pin Allocation of RCM150
Pin 1
- Input connector, 3 pins: Wago 236-403: Vi+, Vi–, PE;
wire section: 0.08 – 2.5 mm 2, 28 – 12 AWG;
with option K: Phoenix Contact 1923762
Vi–
Vi+
PE
R+
R–
n.c.
OK1
OK2
n.c.
SD
R
R
n.c.
OK
OK
n.c.
SD0
- Auxiliary connector: Phoenix Contact 1713883;
pin allocation see fig. 13.
Vo+
Vo–
- Output connector, 2 pins: Wago 236-402: Vo+, Vo–;
wire section: 0.08 – 2.5 mm 2, 28 –12 AWG
with option K: Phoenix Contact 1923759
Fig. 13
Pin allocation of RCM150
Connectors and Pin Allocation of RCM300
Pin 1
Vi–
Vi+
PE
R+
R–
n.c.
OK1
OK2
n.c.
SD
R
R
n.c.
OK
OK
n.c.
SD0
- Auxiliary connector: Phoenix Contact 1713883; pin
allocation see fig. 14.
Vo–
- Output connector, 2 pins: Wago 745-602/006, Vo–,
Vo+ wire section: 0.2 – 16 mm2, 24 – 10 AWG
with option K: Weidmüller 1048390000
Vo+
- Input connector, 3 pins: Wago 745-353: Vi–, Vi+, PE
wire section: 0.2 – 6 mm 2, 24 – 10 AWG
with option K: Weidmüller 1048500000
Fig. 14
Pin allocation of RCM300
Installation Instruction
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 wire section.
The auxiliary connector shall be connected via the suitable female connector; see Accessories.
Other installation methods may not meet the safety requirements. Check that PE is safely connected to protective earth.
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.
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.
Standards and Approvals
The RCM Series converters are approved according to the last edition of IEC/EN 62368-1 and UL/CSA 62368-1.
They have been evaluated for:
• 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.
The converters are subject to manufacturing surveillance in accordance with the above mentioned safety standards and with ISO
9001:2015, IRIS ISO/TS 22163:2017 certified quality and business management system..
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Page 16 of 18
RCM Series
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.
Railway Applications
The RCM Series converters have been designed observing the railway standards EN 50155:2021, EN 50121-3-2:2016,
EN 50124-1:2017 and AREMA. All boards are coated with a protective lacquer.
The converters comply with the fire & smoke standard EN 45545:2016, HL1 to HL3.
Insulation Test
The electric strength test is performed in the factory as routine test in accordance with EN 62911, EN 50155:2021 and AREMA.
It should not be repeated in the field, and the Company will not honor warranty claims resulting from incorrectly executed electric
strength tests.
Table 10: Isolation
Characteristics
Input to
Output 1
Input to
Case
Output
to Case
Input
Case
Outputs
Voltage withstand levels (tested acc. to IEC 62368-1) -RCM150
4.2
2.12
1.0
2.86
N/A 3
N/A 3
kVDC
Voltage withstand levels (tested acc. to IEC 62368-1) -RCM300
4.2
2.86
1.0
2.86
N/A 3
N/A 3
kVDC
Voltage withstand levels (designed to meet AREMA and factory tested)
4.2
2.86
2.86
2.86
2.86
2.86
kVDC
Insulation resistance 2
>300
>300
>300
>300
>300
>300
MΩ
5.0
3.5
3.5
3.5
3.5
3.5
mm
Creepage distances
1
OK contacts to
Unit
Pretest of subassemblies in accordance with IEC/EN 62368-1
Tested at 500 VDC
3
No safety isolation requirements applicable between OK contacts to chassis and OK contacts to output per IEC 62368-1
1
2
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Page 17 of 18
RCM Series
150 / 300 W DC-DC Converters
ACCESSORIES
Female Connectors
A suitable female auxiliary connector HZZ00145-G (Phoenix Contact 1790344) is available; see fig. 15.
Wire section: 0.2 – 1.5 mm 2, 24 – 16 AWG.
Fig. 15
Female connector 14 pins, HZZ00145-G (Phoenix Contact 1790344)
For converters RCM150 with option K, use (see fig. 16):
For converters RCM300 with option K, use (see fig. 17):
• HZZ00300-G (3 poles, Phoenix Contact 1942167)
• HZZ00301-G (2 poles, Phoenix Contact 1942154).
• HZZ00303-G (3 poles, Weidmüller 1060580000)
• HZZ00302-G (2 poles, Weidmüller 1060550000).
Wire section: 0.2 – 2.5 mm 2, 24 – 12 AWG.
Wire section: 0.5 – 10 mm 2, 24 – 8 AWG
Fig. 16
Female connectors for RCM150 with option K
Fig. 17
Female connectors for RCM300 with option K
DIN-Rail Mounting Bracket DMB
A suitable DIN-Rail mounting bracket HZZ00625-G is available; see Fig. 18.
Fig. 18
DIN-Rail mounting bracket for RCM series HZZ00625-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.
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Page 18 of 18
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