Product Quick Selection Wheel

DRR Series DRR SERIES - Delta DIN Rail Redundancy Module

  • 24V to 48Vdc - 20A & 40A Redundancy module
  • 2 Channel Inputs
  • 2 x DC OK LED indicator signal
  • Voltage alarms relay output
  • Wide Input 22-60Vdc
  • Conformal coating Corrosion resistant
  • RoHS Compliant
  • DIN Rail mounting

DRR SERIES - Delta DIN Rail Redundancy Module

Product Overview

DRR Series Delta DIN Rail Redundancy Module

The Redundancy Module DRR 20 and DRR 40 are the latest offering from one of the World’s No.1 Power Supply Company. The product offers a variable input & output voltage from 22-60V, a wide temperature range from -40°C to 80°C. The state-of-the-art design is made to withstand harsh industrial environments. The rugged, compact aluminium case is shock and vibration resistant according to IEC60068-2-6. Due to the wide input & output voltage range from 22 to 60Vdc, the Delta’s CliQ II Redundancy Module is able to support power supply in parallel operation. The DRR module has an alarm relay contact as an indicator.


Nominal Input voltage 24V / 48Vdc
Input voltage range 22 - 60Vdc
Input current

DRR-20: 20A Max

DRR-40: 40Max

Output voltage

24 / 48Vdc

Vin - 0.65Vdc drop

Output current

DRR-20: 20A Max

DRR-40: 40Max

Short Circuit

Over Load Limit

DRR-20: 25A

DRR-40: 50A

Efficiency > 97% typ.
Electrical Equipment IEC60204-1 (Over Voltage Category III)
Electrical Safety UR/cUR recognized to UL60950-1, AIQ BG to EN60950-1, CB test certificate and report to IEC60950-1 and CE
Industrial Control Equipment UL/cUL listed to UL508
Hazardous Location / ATEX cCSAus to CSA C22.2 No.213-M1987, ANSI / ISA 12.12.01:2007 [Class I, Division 2, Gr oup A,B,C,D T4, Ta = -40°C to +80°C (> +50°C derating)] EN60079-0:2009, EN60079-15:2010 [ExII 3G Ex nA nC IIC T4 Gc, Ta = -40°C to +80°C (> +50°C derating)]
CE Conformance with EMC guideline 2004/108/EC and for low voltage guideline 2006/95/EC For DRR-20A and DRR-40A: In conformance with Equipment for explosive atmospheres (ATEX) directive 94/9/EC
Electronic Equipment EN50178 / IEC62103
Safety Entry Low Voltage

PELV (EN60204), SELV (EN60950)

RoHS Compliant RoHS Directive 2011/65/EU Compliant
Protection Against Electric Shock DIN 57100-410
Operating Temperature -40°C to +80°C

> 50°C derate 2.5%/°C linearly to 70°C

Humidity 95%RH (Non condensing)

The overload condition must be controlled by The PSUs in parallel; The limit of input current would not more than 25A (For 20A module) or not more than 50A (For 60A module).


>800,000hrs , as per Bellecore std, or IEC61709

Isolation voltage

Input - PE; 1.5KVAC

Output - PE; 1.5KVAC

Degree of protection


Class of protection

Class II with PE connection


DC Input OK: V in1 OK and V in2 OK (Green LED)

24V System; LED turns on when Vin1 & Vin2 > 18V ±5%, and not more than 30V

48V System; LED turns on when Vin1 & Vin2 > 36V ±5% and not more than 60V

Outside these ranges the LED will turn OFF

Input Voltage Alarm /

Relay Contacts


24V system: Vin1 & Vin2, >18V ± 5% or <30V

48V system: Vin1 & Vin2, >36V ± 5% or <60V

Case Cover Aluminium

121 x 50 x 122mm, 375g

121 x 50 x 122mm, 515g

Mounting Rail TS35 DIN Rail in accordance with EN60715

Technical Illustration

  • DRR-40 DRR-40
  • DRR-20 DRR-20
Back to Top

Ask Your Question