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Allen Bradley 1771-WN SLC 500 Watchdog Timer Module

Allen Bradley SLC 500 Watchdog Timer Module.

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ManufacturerAllen Bradley

Part number1771-WN

Module Type Watchdog Timer

Compatible PLC SLC 500

Backplane Current 30mA @ 5V DC

Dimensions 130mm x 84mm x 34mm

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Watchdog timer functionality SLC 500 system compatibility Fail-safe shutdown capability Monitors PLC program execution Compact module design

Product description

The Allen Bradley 1771-WN is a Watchdog Timer Module designed for the SLC 500 family of programmable logic controllers. This module provides a timed shutdown capability to ensure system safety by monitoring the controller's operation.

This module is typically used in safety-critical applications or any system where a fail-safe condition is required if the PLC program stops executing. It is relevant for industries that prioritize operational safety and system integrity, such as manufacturing and process control.

Stanlo Automation, a veteran-owned surplus parts distributor, offers reliable industrial automation components. Find the Allen Bradley 1771-WN and other essential SLC 500 modules at competitive prices to maintain your operational continuity.

Technical specifications

Module Type	Watchdog Timer
Compatible PLC	SLC 500
Backplane Current	30mA @ 5V DC
Dimensions	130mm x 84mm x 34mm

Common applications

Safety monitoring

PLC system integrity

Critical process control

Machine safety

Manufacturing automation

Compatible systems

SLC 500 chassis SLC 500 controllers

Also known as

SLC 500 Watchdog AB 1771-WN Allen-Bradley Timer Module

Replaces / compatible with

This module provides a safety function for SLC 500 systems by acting as a watchdog timer to ensure the PLC program is running as expected.

Technical note

Expert tip

The watchdog timer interval for the 1771-WN module must be configured within the SLC 500 software to ensure it is appropriately set for the application's needs.

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Frequently asked questions

What is the purpose of the Allen Bradley 1771-WN module in an SLC 500 system?

The Allen Bradley 1771-WN module serves as a watchdog timer for the SLC 500 system. Its primary function is to monitor the PLC's program execution and trigger a safe shutdown if the program fails to execute within a specified time frame, enhancing system safety.