EN
CD10.241 Installation Manual
Product Description
The CD10.241 is a DIN-rail mountable DC/DC converter, which provides a floating, stabilized and
galvanically separated SELV/PELV output voltage.
Intended Use
This device is designed for installation in an enclosure and is intended for commercial use, such as 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.
If this device is used in a manner outside of its specification, the protection provided by the device may
be impaired.
Installation Instructions
Install 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. Unused screw terminals
should be securely tightened.
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 enclosure does not provide
protection against spilled liquids.
The input can be powered from batteries or similar DC sources. The voltage between the input
terminals and ground must not exceed 60Vdc continuously.
The input must be powered from a PELV or SELV source or an "Isolated Secondary Circuit" in order to
maintain a SELV or PELV output.
Check for correct input polarity. The device will not operate when the voltage is reversed.
A disconnecting means shall be provided for the input of the device.
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 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 5000m (16400ft). 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 50A without additional protection
device. If an external fuse is utilized, do not use circuit breakers smaller than 20A B- or C-
Characteristic to avoid a nuisance tripping of the circuit breaker.
The maximum surrounding air temperature is +70°C (+158°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.
Functional Description
The output is electronically protected against no-load, overload and short circuit and can supply any
kind of loads, including unlimited inductive and capacitive loads.
Do not apply return voltages from the load to the output terminals higher than 35V.
The output voltage can be adjusted with a small flat-blade screwdriver on the front of the unit.
The green DC-OK LED reports a voltage on the output terminals above 21Vdc.
Devices can be paralleled to increase the output power. The ambient temperature is not allowed to
45°C. The output voltage shall be adjusted to the same value (±100mV) with the same load
conditions on all devices, or the devices can be left with the factory settings. If more than three
devices are connected in parallel, a diode, fuse or circuit breaker with a rating of 15A or 16A is
required on each output.
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 32.5V. The
output shuts down and automatically attempts to restart.
Technical Data
All values are typical figures specified at 24Vdc input voltage, 24V, 10A
output load, 25°C ambient and after a 5 minutes run-in time unless
otherwise noted.
Output voltage
DC 24V
Nominal
Adjustment range
24 – 28Vdc
Factory setting 24.1V
Output current
12.0 – 10.3A
Below +45°C ambient
10.0 – 8.6A
At +60°C ambient
7.5 – 6.5A
At +70°C ambient
Derate linearly b45 and +70°C
Input voltage
DC 24V
-25% / +46%
Input current
10.5A
Input inrush current
8A pk
At 40°C, cold start
Efficiency
94.2%
Power losses
14.8W
Hold-up time
4ms
Temperature range
-25°C to +70°C
Max. wire size (litz wire)
4mm²
Wire size AWG
AWG 20-10
Max. wire diameter
2.8mm
Wire stripping length
7mm / 0.28inch
Tightening torque
1Nm / 9lb.inch
Size
(wxhxd)
42x124x117mm Without
DIN-rail
Weight
500g / 1.1lb
Functional Diagram
+
+
-
-
V
OUT
Input
Fuse
&
Input
Filter
Output
Voltage
Regulator
Output
Filter
DC-
OK
Output
Over-
Voltage
Protection
Reverse
Polarity
Protection
&
Inrush
Limiter
PE
+
-
Power
Converter
Output Characteristic
Output voltage
15A
24V
Output current
12V
0V
3A
6A
9A
12A
0A
Adjustment range
28V
Temperature Range
Allowed output current at 24V
Ambient temperature
0A
-25
A: continuous
B: short term (max. 60s)
12A
+25
0
+45
+70°C
7.5A
A
B
10A
+60
