OVERVIEW

Official designation: Allen-Bradley 1791-24AR (Block I/O, Mixed I/O Module)

Role/Application: This compact 120V AC-powered Block I/O module provides distributed control with 24 AC inputs and 8 relay outputs for use in Remote I/O industrial automation systems.

KEY SPECS SUMMARY

Power: 85-132V AC external, 47-63 Hertz

Interfaces / Ports: Remote I/O network, non-removable terminal strips

Indicators: Input Status LEDs, Communication LED, Status LED

Operating Temp: Minus 20 degrees C to plus 60 degrees C

Platform / Compatibility: PLC-2, PLC-3, PLC-5, and SLC family processors

Limit: Maximum power dissipation is 11.36 Watts

Lifecycle: Discontinued/Obsolete

FREQUENTLY ASKED QUESTIONS

Technical Specifications:

Q: What are the input and output voltage specifications for the 1791-24AR module?

A: The inputs operate from 79 to 132V AC, and relay outputs support 20 to 132V AC/DC.

Wiring & Installation:

Q: What is the maximum recommended air gap around the module for cooling purposes?

A: An air gap of 2.0 inches (50.8 millimeters) is required on all four sides of the block module.

Troubleshooting & Compatibility:

Q: What is the maximum resistive current capacity per relay output on this module?

A: The relay outputs are rated for a maximum resistive current of 1 Ampere.

Replacement & Upgrades:

Q: Is the Allen-Bradley 1791-24AR Block I/O module still actively supported by the manufacturer?

A: The 1791-24AR module has an official product lifecycle status of Discontinued/Obsolete.