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IMARK    5020RM  Power Supply


240V AC - 13.8V DC 20 Amp Regulated Rack Mounting Power Supply with Battery Back-Up

Imark Stock # 602122


  • 13.8V DC 20 Amp continuous duty output
  • Full Metering
  • No-Break Battery Change-Over Facility
  • Automatic Relay Operated Battery Release
  • Circuit Breaker Battery protection
  • Double Regulated Temperature Compensated Voltage Reference
  • Over-Voltage Protection
  • Over-Temperature Shut-Down Protection
  • LED's indicate critical element status
  • Outputs for Remote Monitoring
  • EMC/EMI Approval



The IMARK 5020RM Regulated Power Supply operates from a 240 Volt AC power source and provides a 13.8 Volt DC output to operate 12 Volt (nominal) equipment. The 5020RM Power Supply includes over voltage protection, fold-back current protection, and short circuit protection, while large filter capacitors provide a low noise output. The 5020RM is housed in a 3RU 19" rack mounting cabinet. The front panel includes meters for Load Voltage, Load Current, Battery Voltage, Battery Current, as well as LED indicators for other status notification.

The IMARK 5020RM Power Supply features a linear design and operates at greater than 50% efficiency. It provides 20 Amps continuous output power. The design is compact and includes a rugged all metal housing with a large aluminium extrusion on the rear panel to provide excellent heat dissipation. Connectors are provided on the rear panel for easy connection to the AC Input, and Load, Battery, and low current output, as well as a DB25 connector for remote monitoring purposes.

The IMARK 5020RM includes a Battery Back-Up feature that automatically changes from power supply to battery depending on the state of the AC Input. It also includes a low voltage battery release to protect the battery and equipment in the event of a prolonged mains power failure.

The IMARK 5020RM is supplied with a comprehensive operator's manual, a 1.8 metre AC Cable that plugs into the IEC socket on the rear panel during installation, Cable and Connectors for Load and Battery, and spare fuses.



Input Voltage 240 Volts AC 50Hz (nominal), (Other Voltages available on request)
Input Current 3 Amps RMS Max @ 240 Volts AC.
Output Voltage 13.8 Volts DC
Output Current 20 Amps Continuous @ 25 C
Output Ripple 5mV RMS (Max) @ 20 Amps
Output Regulation 150mV DC (Max) from 0 - 20 Amps
Output Stability 50mV (Max) after 15 minutes warm-up @ 13.8 Volts DC
Heatsink Temperature Rise 50 C @ 25 C Ambient
Battery Current Drain 250 mA (During Mains Failure with No Load)

30 mA (after Low Voltage Release)

Under-Voltage Battery Release 8 - 12 Volts Internally Adjustable
Operating Temperature Range 0 C to 60 C
Current Limit Setting 10 - 30 Amps Internally Adjustable
Fold-Back Protection Internally Adjustable Short Circuit Current 5 0.5 Amps Nominal
Safe Area Current Limiting Current Limit decreases by 1 Amp/20 C from 25 C
Over-Voltage Crowbar Protection 10 - 18 Volts Internally Adjustable
Humidity 95% non-condensing
Unit Dimensions 483mm (W) x 450mm (D) x 132.5mm (H)
Shipping Dimensions 575mm (W) x 535mm (D) x 300mm (H)
Unit Weight 24Kgs
Shipping Weight 25.5Kgs
Inclusions Manual, AC Cable, Load & Battery Cables and Connectors, Spare Fuses
Approvals AS/NZS 1044:1995 Amendment 1:1997, CISPR 14:1995, CS910171V
Imark Stock # 602122


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