PULS

Power supply unit

DIMENSION series

CD-series

Power supply unit (PSU) / DC/DC-Converter
20% power reserve

ATEX approval
galvanic isolation
20% power reserve

18Vdc-32.4Vdc (24Vdc nom.)
14.4-18Vdc for max. 60s

DC

9.6A (at 12Vdc; -25...+45°C)
8A (at 12Vdc; +45...+60°C)
2.5W/+60°C...+70°C (derating)

116W (ambient less than 45°C)
96W (ambient less than 60°C)

12Vdc-15Vdc (adjustable)
500mV turn-ON overshoot

7ms (buffer time at 24Vdc input)

screw-clamp connections

output overvoltage protection (16.5Vdc typ. / 16.8Vdc max.)
Short-circuit current -- min. 14A continuous current (short circuit impedance 150mΩ) / max. 18A continuous current (short circuit impedance 150mΩ)
Series / parallel operation -- The DC/DC-converter can be paralleled to increase the output power. Devices can be paralleled for 1+1 redundancy to gain higher system availability. Daisy chaining (jumping from 1 DC/DC-converter output to the next) is allowed as long as the average output current through 1 terminal pin does not exceed 25A. If the current is higher use a separate distribution terminal block.
Back-feeding loads max. 16V -- The unit is resistant and does not show malfunctioning when a load feeds back voltage to the power supply. It does not matter whether the power supply is ON or OFF. The absorbing energy can be calculated according to the built-in large sized output capacitor.
Reverse polarity protection

0.882 (12Vdc 8A input)

32 mm

DIN rail mounting

W32mm x H124mm x D102mm

Aluminium housing

-25...+70 °C

4.6A (24Vdc input; full 12Vdc output; 8A)
1.6A peak max. inrush (at 24Vdc input)

(24Vdc input; 12V output load; 8A) 12.8 W
(24Vdc input; 12V output load; 4A) 6.4 W

For galvanic isolation in mobile applications e.g. ships or forklifts

Commercialized

CD5121

(output stage) 6500 μF

CE marking
UL 508
UL 60950-1
IEC 60950-1 CB-Scheme
IECEx
ATEX
Class I Div. 2 HazLoc
GL Marine
ABS Marine
EAC Registration
EN 61000-6-1 Immunity for residential environments
EN 61000-6-2

24VDC-input
Isolated 12Vdc Output
Efficiency up to 88.2%
Width only 32mm
20% Output power reserve
Full power between -25°C and +60°C
Soft-start function included
Minimal inrush current surge
Reverse input polarity protection
3 Year warranty
The Dimension CD-Series offer DIN-rail DC/DC converters in the 92-120W output power range in a very compact housing. These DC/DC converters are allowed to run with a battery or similar sources. The CD5.121 converts a 24V voltage to a 12V voltage. The CD5.121 includes all the essential basic functions and has a power reserve of 20% included. This extra power can be used continuously up to +45°C. The output is electrically isolated from the input in a safe way. The input is protected against reversed voltages and contains a soft start function.

(at 40°C; 4A output; 1AC 24Vdc input) 173000 hours
(at 40°C; 8A output; 1AC 24Vdc input) 63000 hours
(at 40°C; 9.6A output; 1AC 24Vdc input) 35000 hours
(at 25°C; 8A output; 1AC 24Vdc input) 179000 hours

75mVpp (20Hz...20MHz; 50Ω)

1161000h (at 40°C; 24Vac input; MTBF SN 29500 IEC 61709)
1904000h (at 25°C; 24Vac input; MTBF SN 29500 IEC 61709)
610000h (at 40°C; 24Vac input; MTBF MIL HDBK 217F)
817000h (at 25°C; 24Vac input; MTBF MIL HDBK 217F)

420ms start-up delay (24Vdc input)
210ms rise time (nominal input; constant full current load; 0mF load capacitance)