Instructions

EN
CPS20.241-60 Installation Manual
Product Description
The CPS20.241-60 is a DIN-rail mountable DC/DC converter with conformal coated pc-boards of the
DIMENSION series. It provides a floating, stabilized and galvanically separated SELV/PELV output
voltage.
The output of the device is equipped with a decoupling MOSEFT for 1+1 and n+1 redundant use.
Intended Use
This device is designed for installation in an enclosure and is intended for use in rolling stock
equipment for railway applications according to EN 50155 or for use in industrial control, process
control, monitoring and measurement equipment or the like. Do not use this device in equipment,
where malfunction may cause severe personal injury or threaten human life.
Installation Instructions
Install the device in an enclosure providing protection against electrical, mechanical and fire hazards.
Install the device onto a DIN-rail according to EN 60715 with the input terminals on the bottom of the
device. Other mounting orientations require a reduction in output current.
Make sure that the wiring is correct by following all local and national codes. Use appropriate copper
cables that are designed for a minimum operating temperature of 60°C for ambient temperatures up to
+45°C, 75°C for ambient temperatures up to +60°C and 90°C for ambient temperatures up to +70°C.
Ensure that all strands of a stranded wire enter the terminal connection.
The device is designed for pollution degree 2 areas in controlled environments. No condensation or
frost is allowed.
The enclosure of the device provides a degree of protection of IP20.
The device is designed as “Class of Protection I” equipment according to IEC 61140.
Do not use without a proper PE (Protective Earth) connection.
The device can be powered from a regulated power supply or a similar DC source. The voltage
between the supply voltage terminals and ground must not exceed 375Vdc continuously.
A disconnecting means shall be provided for the input of the device.
The device is designed for convection cooling and does not require an external fan. Do not obstruct
airflow and do not cover ventilation grid!
The device is designed for altitudes up to 6000m (19685ft). See additional requirements in the product
datasheet for use above 2000m (6560ft).
Keep the following minimum installation clearances: 40mm on top, 20mm on the bottom, 5mm left and
right side. Increase the 5mm to 15mm in case the adjacent device is a heat source. When the device
is permanently loaded with less than 50%, the 5mm can be reduced to zero.
The device is designed, tested and approved for branch circuits up to 32A (IEC) and 30A (UL) without
additional protection device. If an external fuse is utilized, do not use circuit breakers smaller than 10A
B- or C-Characteristic to avoid a nuisance tripping of the circuit breaker.
The maximum surrounding air temperature is +85°C (+185°F). The operational temperature is the
same as the ambient or surrounding air temperature and is defined 2cm below the device.
The device is designed to operate in areas between 5% and 95% relative humidity.
Check for correct input polarity. The device will not operate when the voltage is reversed.
Functional Description
The output is electronically protected against no-load, overload and short circuit and can supply any
kind of loads, including unlimited inductive loads and capacitive loads. If capacitors with a capacitance
>0.5F are connected, the unit might charge the capacitor in an intermittent mode.
Do not apply return voltages from the load to the output higher than 35V.
The green DC-OK LED reports an output voltage above 22V, which is produced by the device itself.
The DC-OK relay monitors the output voltage and the contact is closed when the DC-OK LED is on.
Contact ratings: 60Vdc 0.3A, 30Vdc 1A, 30Vac 0.5A for resistive loads.
The device is equipped with an over-temperature protection. In case of a high temperature, the output
shuts down and starts automatically again after cooling off.
At heavy overloads (when output voltage falls below 13V), the device delivers continuous output
current for 2s. After this, the output is switched off for 18s before a new start attempt is automatically
performed. This cycle is repeated as long as the overload exists.
Devices can be paralleled to increase the output power. The ambient temperature is not allowed to
exceed +60°C. The device is featured with a "soft output regulation characteristic" in order to achieve
current share between multiple devices, when they are connected in parallel. The "soft output
regulation characteristic" regulates the output voltage in such a manner that the voltage at no load is
approx. 2% higher than at nominal load. Energize all units at the same time. It also might be
necessary to cycle the input power (turn-off for at least five seconds), if the output was in overload or
short circuit.
Same devices can be connected in series for higher output voltages. It is allowed to connect as many
devices in series as needed, providing the sum of the output voltage does not exceed 150Vdc.
In case of an internal defect, a redundant circuit limits the maximum output voltage to 32V. The output
shuts down and automatically attempts to restart.
Technical data
All values are typical figures specified at 110Vdc input voltage, 24V 16.3A
output load, 25°C ambient temperature and after a 5 minutes run-in time
unless otherwise noted.
Output voltage DC 24V 0%/+6%
Adjustment range - Not adjustable
Output current 16.3A Continuous below +70°C
16.3A For 10 minutes at +85°C
Input voltage DC DC 110V -30% / +40%
Input current DC 3.87A
Input inrush current 6A pk
Efficiency 93.7%
Power losses 26.9W
Hold-up time 35ms
Temperature range -40 to +85°C
Max. wire size (litz wire) 4mm² Power terminals
Wire size AWG AWG 20-10 Power terminals
Max. wire diameter 2.8mm Power terminals
Wire stripping length 10mm / 0.4inch Power terminals
Max. wire size (litz wire) 1.5mm² Signal terminals
Wire size AWG AWG 26-14 Signal terminals
Max. wire diameter 1.5 mm Signal terminals
Wire stripping length 7mm / 0.28inch Signal terminals
Size (wxhxd) 65x124x127mm Without DIN-rail
Weight 980g / 2.16lb
Functional diagram
+
+
-
-
DC-OK
contact
Output
Over-
Voltage
Protection
Output
Voltage
Regulator
Output
Filter
DC-ok
Relay
Output
Voltage
Monitor
Output
Power
Manager
Temper-
ature
Shut-
down
DC-OK
LED
Power
Converter
De-
coupling
Input Fuse
Input Filter
Active
Inrush
Limiter
+
-
Reverse
Polarity
&
Back-
feeding
Protection
Boost
Converter
Output characteristic
Output voltage
25A
24V
Output current
12V
0V
5A 10A 15A 20A0A
A: continuous current
B: intermitted current
A
B
Temperature range
Allowed output current
Ambient temperature
6A
0A
-40°C
A: 100-154Vdc continuous
B: 77-100Vdc continuous
C: up to 10 minutes
16.3A
+25°C0°C +50°C +70°C +85°C
12A
C
B
A