OVERVIEW

Official designation: Allen-Bradley 1753-OW8 (GuardPLC Series, Relay Output Module)

Role/Application: A distributed I/O module with 8 relay outputs for use in GuardPLC safety control systems, providing switching capability and communicating via integrated 100 Mbps GuardPLC Ethernet switches.

KEY SPECS SUMMARY

Power: 24V DC nominal, -15 to 20 percent range

Interfaces / Ports: Two RJ-45 Ethernet ports

Indicators: Status, fault, and 8 output LEDs

Operating Temp: 0 to 60 degrees C

Platform / Compatibility: GuardPLC system, DIN rail mountable

Limit: 8 relay outputs, 2.5 Amps max per point

Lifecycle: Discontinued 09/01/2018

FREQUENTLY ASKED QUESTIONS

Technical Specifications:

Q: What are the relay contact electrical life ratings when switching resistive DC loads?

A: The contact life is approximately 100,000 cycles at 2.5 A resistive DC load at 24V DC.

Wiring & Installation:

Q: What mounting restriction is critical for the 1753-OW8 to ensure proper heat dissipation?

A: The module must be mounted horizontally with 100 millimeters (3.94 inches) clearance above and below.

Troubleshooting & Compatibility:

Q: Is external surge suppression required for inductive loads connected to the relay outputs?

A: Yes, surge suppressors must be connected across external inductive loads to extend the relay contact service life.

Replacement & Upgrades:

Q: What is the recommended practice for handling the module to prevent electrical damage during installation?

A: Use a grounded wrist-strap device and static-safe work area to prevent damage from electrostatic discharge.