Protege DIN Rail 8 Input Expander


The Protege DIN Rail 8 Input Expander provides the interface of up to 8 inputs (16 using Input Duplex Mode) for monitoring and automation in the Protege system. With 8 inputs that can be used for extended monitoring functionality, the DIN Rail 8 Input Expander provides extensive hardware advancements that allow flexible input programming and configuration, and is designed for use with industry standard DIN Rail mounting.

Key Features:

Power Supply

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

Connectivity and System Expansion

Expanding the Protege System with local inputs from the Input Expander allows convenient cost effective expansion and the added benefits of:

  • 8 inputs (16 with input duplex mode) can be assigned to any 4 areas in the system each being processed using different options or features.
  • Address configuration of the Input Expander interface is achieved using the address programming feature of the Protege System Controller.


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

Upgradable Firmware

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

Ordering Code PRT-ZX8-DIN
Power Supply
DC Input Voltage 11-14VDC
DC Output Voltage 10.83-14.0VDC 0.7A (typical) electronic shutdown at 1.1A
Operating Current 50mA (typical)
Total Combined Current* 1.5A (max)
Low Voltage Cutout 8.7VDC
Low Voltage Restore 10.5VDC
RS-485 Isolated module network
Inputs 8 high security monitored inputs(10ms to 1hr input speed programmable)
16 if using input duplex mode
Trouble Inputs 16
Dimensions (L x W x H) 78.4 x 90 x 44.1mm (3.08 x 3.54 x 1.73")
Net Weight 160g (5.6oz)
Gross Weight 230g (8.1oz)
Operating Conditions
Operating Temperature UL/ULC 0° to 49°C (32° to 120°F) : EU EN -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)

* The Total Combined Current refers to the current that will be drawn from the external power supply to supply the expander and any devices connected to its outputs. The auxiliary outputs are directly connected via thermal resettable fuses to the N+ N- input terminals, and the maximum current is governed by the trip level of these fuses.

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