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Protege DIN Rail
16 Input Opto-Isolated Expander


The Protege DIN Rail 16 Input Opto-Isolated Expander provides the interface of up to 16 low or high voltage signals to the Protege system. The Input Expander provides extensive hardware advancements that allow flexible programming and configuration, and is designed for use with industry standard DIN Rail mounting.

  • 16 opto-isolated inputs capable of handling high voltage DC and AC signals
  • 2 state zone alarm providing alarm and closed conditions
  • Connect any combination of normally closed or normally open inputs
  • 4 50mA (Max) open collector outputs


Extending the Protege system with local inputs and outputs allows convenient, cost-effective expansion with the following additional benefits:

  • 16 opto-isolated inputs capable of a large voltage range, ideal for use in lift control or automation installs
  • 4 multiple function outputs for use in any programmable output entry, ideal for connection in an electrical switch room to control signage, lighting and building automation or system indicators
  • Address configuration is achieved using the address programming feature of the Protege System Controller

Device power is supplied from a 12VDC input. Ultra low current requirements ensure cost-effective power distribution.

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

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

  • Status indicator
  • Fault indicator
  • Power indicator
  • Output indicators
  • Input indicators

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


Ordering Information
PRT-ISO16-DIN Protege DIN Rail 16 Input Opto-Isolated Expander
Power Supply
DC Input Voltage 11-14V DC
DC Output Voltage (DC IN Pass-Through) 10.45-13.85VDC 0.7A (Typical) Electronic Shutdown at 1.1A
Operating Current 80mA (typical)
Low Voltage Cutout 8.7VDC
Low Voltage Restore 10.5VDC
RS-485 Isolated module network
Operating Voltage 10V to 250V (DC/AC RMS) 35-75Hz
Input Type 16 galvanic isolated (10ms to 1hr input speed programmable)
Input Current Drawn Current 2mA per input at 220VDC
Outputs 2 50mA (max) open collector
Dimensions (L x W x H) 156.8 x 90 x 60mm (6.17 x 3.54 x 2.36")
Net Weight 289g (10.2oz)
Gross Weight 390g (13.8oz)
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) 784,316 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.

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.


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.