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Protege DIN Rail
8A Intelligent Power Supply


The Protege DIN Rail 8A Intelligent Power Supply provides the Protege system with 12VDC power, ideal for running security, access control or automation devices along with large numbers of Protege network powered modules in the same installation.

The power supply includes intelligent charging for optimum performance and allows for simple and powerful monitoring of supply currents and voltages.

  • Mains input for ready deployment reduces setup complexity
  • 2 Form B relay outputs can be used as programmable outputs or as additional status outputs
  • Battery backup connection for uninterrupted power delivery
  • Processor controlled battery level testing and indication
  • Intelligent charging algorithm monitors battery and AC supply ensuring optimum performance


The Power Supply is capable of supplying power to a large number of smaller devices or multiple high-current devices with a combined total output of 7.5 amps. A battery charging circuit current of 500mA is also provided by the power supply.

A continuous source of power is maintained with the inclusion of intelligent battery backup charging, optimal level maintenance and seamless switch on AC failure. The battery backup, AC status and core temperature are constantly monitored, and failure conditions are communicated to the Protege system.

The backup battery plays an important role in power conditioning and provides a continuous source of power in the event of a power outage.

The battery test procedure uses a proprietary algorithm to prevent deep discharge and increase battery endurance. A dynamic battery test is performed every ten minutes when mains power is present, and a battery condition alarm will be generated if the battery is disconnected or shows poor capacity. Battery fault conditions will activate the associated battery trouble input. 

In addition to the dynamic battery test procedure the power supply performs a battery presence test every 60 seconds. If no backup battery is detected a battery condition alarm will be generated and the associated trouble input will be activated.

Upon reconnection of mains power the power supply automatically detects the backup battery and begins controlled charging.

The power supply is able to relay information about critical system voltages, currents and core temperature to the Protege GX integrated system controller.

The controller can then store these values in variables which can be viewed live from the Protege GX system interface and monitored on a status page or floor plan, along with logging for review at any time.

A single RS-485 communication interface port used for all network communication functions and interconnection to other modules.

The power supply has two 50mA outputs that can operate as either programmable outputs or predefined status outputs.

While in online mode the two outputs function as programmable outputs and can be used to activate bell sirens, lighting circuits, door locks, relay accessory products and other automation points.

While in offline mode the two outputs function as status outputs. In addition to the comprehensive front panel diagnostic indicators these status outputs offer additional information that can aid in diagnosing faults and conditions.

The power supply features comprehensive diagnostic indicators that can aid in diagnosing faults and conditions. LED indicators on the power supply include:

  • Status indicator
  • Fault indicator
  • Power indicator
  • V1 output/V2 output indicators
  • Battery indicator
  • Temp indicator
  • Output current indicator

Utilizing the latest flash technology and high performance communication mediums, the firmware can be updated via the Protege interface.


Ordering Information
PRT-PSU-DIN-8A Protege DIN Rail 8A Intelligent Power Supply
Power Supply
Mains Input Voltage 120VAC (90-264VAC, 47-63Hz)
Mains Input Operating Current 120VAC 2500mA (full load)
DC Output (Combined) 12.64VDC 7.5A Max (V1Out + V2Out total)
DC Output (Single) 12.2VDC 5A Max
Battery Charging 500mA (Typical)
Battery Low 11.75VDC
Battery Restore 12.5VDC
RS-485 Isolated Module Network
Outputs 2 Solid State Relay Outputs, 50mA 12V Max each
Tamper Dedicated Hardware Tamper Input
Trouble Inputs 8 (internal)
Dimensions (L x W x H) 156.8 x 90 x 60mm (6.17 x 3.54 x 2.36")
Net Weight 460g (16.2oz)
Gross Weight 570g (20.1oz)
Operating Conditions
Operating Temperature -10° to 55°C (14° to 131°F)
Storage Temperature -10˚- 85˚C (14˚ - 185˚F)
Humidity 0%-93% non condensing, indoor use only (relative humidity)
Mean Time Between Failures (MTBF) 217,030 hours (calculated using RFD 2000 (UTE C 80-810) Standard)

Regulatory Notices

This equipment carries the RCM label and complies with EMC and radio communications regulations of the Australian Communications and Media Authority (ACMA) governing the Australian and New Zealand (AS/NZS) communities.

Protege systems conform to AS/NZS 2201.1:2007 Class 5 intruder alarm systems standards for the construction, operation, performance and installation of intruder alarm equipment and systems installed in clients' premises.

Conforms where applicable to European Union (EU) Low Voltage Directive (LVD) 2014/35/EU, Electromagnetic Compatibility (EMC) Directive 2014/30/EU, Radio Equipment Directive (RED)2014/53/EU and RoHS Recast (RoHS2) Directive: 2011/65/EU + Amendment Directive (EU) 2015/863.

This equipment complies with the rules, of the Official Journal of the European Union, for governing the Self Declaration of the CE Marking for the European Union as specified in the above directives.

This equipment carries the UKCA label and complies with all applicable standards.

  • UL1610 for Central-Station Burglar-Alarm Units
  • UL294 for Access Control System Units
  • CAN/ULC S304 for Signal Receiving Centre and Premise Burglar Alarm Control Units
  • CAN/ULC S319 for Electronic Access Control Systems
  • CAN/ULC S559 for Fire Signal Receiving Centers and Systems


his is a Class A digital device that meets all requirements of the Canadian Interference-Causing Equipment Regulations.


FCC Rules and Regulations CFR 47, Part 15, Class A.

This equipment complies with the limits for a Class A digital device, pursuant to Part 15 of the FCC rules. Operation is subject to the following two conditions: (1) This device may not cause harmful interference; (2) This device must accept any interference received, including interference that may cause undesired operation.