DC/DC CONVERTER 48V DC-Input Isolated 24Vdc Output Efficiency up to 90.3% Width only 32mm 20% Output Power Reserves Full Power Between -25°C and +60°C Soft-start Function Included Minimal Inrush Current Surge Reverse Input Polarity Protection 3 Year Warranty GENERAL DESCRIPTION SHORT-FORM DATA 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. Output voltage Adjustment range Output current The CD5.242 converts a 48V voltage to a 24V voltage. The CD5.242 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. 24V->24V, NEC Class 2, CD5.241-L1 Spring-clamp-terminals, 24V->24V, CD5.241-S1 Spring-clamp-terminals, Input-low, DC-OK signals ORDER NUMBERS DC 24V 23 - 28V 5 – 4.3A 6 – 5.2A Output power 120W 144W Output ripple < 50mVpp Input voltage DC 48V Input voltage range 36 to 60Vdc 30.5 to 36Vdc Input current typ. 2.75A Input inrush current typ. 0.6A peak Efficiency 90.3% Losses 12.9W Temperature range -25°C to +70°C Derating 3W/°C Hold-up time typ. 5.6ms Dimensions 32x124x102mm ambient <60°C ambient <45°C ambient <60°C ambient <45°C 20Hz to 20MHz full specified with derating at 48Vdc input at 48Vdc input at 48Vdc input operational +60 to +70°C at 48Vdc input WxHxD DC/DC Converter Standard unit ZM1.WALL Wall mount bracket ZM11.SIDE Side mount bracket YRM2.DIODE Redundancy module Jan. 2014 / Rev. 1.4 DS-CD5.242-EN All parameters are specified at 24V, 5A, 48Vdc input voltage, 25°C ambient and after a 5 minutes run-in time unless otherwise noted. www.pulspower.com Phone +49 89 9278 0

The information presented in this document is believed to be accurate and reliable and may change without notice. Some parts of this unit are patent by PULS (US patent No 091662,063, Des. 424,529, …). No part of this document may be reproduced or utilized in any form without permission in writing from PULS GmbH. PE is the abbreviation for Protective Earth and has the same meaning as the symbol Earth, Ground This document uses the term “earth” which is the same as the U.S. term “ground”. To be defined, value or description will follow later. A figure displayed with the AC or DC before the value...

1. INTENDED USE This device is designed for installation in an enclosure and is intended for the general use such as in industrial control, office, communication, and instrumentation equipment. Do not use this DC/DC converter in equipment where malfunction may cause severe personal injury or threaten human life. This device is designed for use in hazardous, non-hazardous, ordinary or unclassified locations. 2. INSTALLATION REQUIREMENTS This device may only be installed and put into operation by qualified personnel. This device does not contain serviceable parts. The tripping of an internal fuse...

3. INPUT VOLTAGE Input voltage Input voltage range max. Allowed voltage between input and earth Turn-on voltage Shut-down voltage Input current Start-up delay Rise time Turn-on overshoot Input capacitance Allowed input ripple voltage 47Hz-40kHz, the momentary input voltage must always be within the specified limits. steady-state value, see Fig. 3-1 steady-state value, see Fig. 3-1 steady-state value, see Fig. 3-1 at 48Vdc input and output 24V, 5A, see Fig. 3-4 see Fig. 3-3 0mF, 24V, constant current load 5A, see Fig. 3-3 5mF, 24V, constant current load 5A, see Fig. 3-3 see Fig. 3-3 external capacitors...

4. SOFT-START AND INPUT INRUSH CURRENT SURGE Inrush current limitation An active inrush limitation circuit (inrush limiting resistor which is bypassed by a relay contact) limits the input inrush current after turn-on of the input voltage. The charging current into EMI suppression capacitors is disregarded in the first microseconds after switch-on. Inrush current Inrush energy Fig. 4-1 Input inrush current, typical behavior Input: Output: Ambient: Upper curve: Middle curve: Lower curve: Time basis: Input Current Input Voltage 48Vdc 24V, 5A, constant current load 25°C Input current 1A / DIV Input...

5. OUTPUT Output voltage Adjustment range Factory setting Line regulation Load regulation Ripple and noise voltage Output capacitance Output current Output power Short-circuit current Fig. 5-1 Output voltage vs. output current, at 48Vdc input voltage, typ. Output Voltage Fig. 5-2 Current limitation vs. input voltage, (23V constant voltage load), typ. at 24V, ambient < 45°C, see Fig. 5-1 at 24V, ambient < 60°C, see Fig. 5-1 at 28V, ambient < 45°C, see Fig. 5-1 at 28V, ambient < 60°C, see Fig. 5-1 for ambient temperatures < 45°C for ambient temperatures < 60°C continuous current, short circuit...

6. HOLD-UP TIME The input side of the DC/DC converter is equipped with a bulk capacitor which keeps the output voltage alive for a certain period of time when the input voltage dips or is removed. The bulk capacitor can be discharged by loading the DC/DC converter on the output side or through a load which is parallel to the input. There is no protection in the DC/DC converter which prevents current from flowing back to the input terminals. If prevention is needed, an external diode should be used. Hold-up Time input 48Vdc, output: 24Vdc, 2.5A, see Fig. 6-1 input 48Vdc, output: 24Vdc, 5A, see...

□IfUiefDSIOfl) CD-Series I 7. EFFICIENCY AND POWER LOSSES Power losses Fig. 7-1 Efficiency vs. output current at 24V output and 48Vdc input voltage, typ. Fig. 7-2 Losses vs. output current at 24V output and 48Vdc input voltage, typ. Power Losses Fig. 7-3 Efficiency vs. input voltage at 24V, Fig. 7-4 Losses vs. input voltage at 24V, 5A, Power Losses ' Input Voltage ' ' All parameters are specified at 24V, 5A, 48Vdc input voltage, 25°C ambient and after a 5 minutes run-in time unless otherwise noted. 8/22