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Allen Bradley

Allen Bradley 1791-8AR Series I/O Module

Allen Bradley 8-point 120V AC input module

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ManufacturerAllen Bradley

Part number1791-8AR

Number of Inputs 8

Input Voltage 120V AC

Isolation Voltage 500V AC

Input Current 5-10 mA

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CAGE: 9NK75

8 Discrete AC Inputs 120V AC Signal Compatibility High Isolation Voltage Suitable for SLC 500 Systems Compact Design Reliable Performance

Product description

The Allen Bradley 1791-8AR is an 8-point AC input module designed for use with Allen-Bradley Programmable Logic Controllers (PLCs). This module provides eight discrete inputs that accept 120V AC signals, making it suitable for applications requiring the detection of AC control signals.

This input module is commonly used in various industrial settings for tasks such as monitoring the status of AC-powered equipment, detecting the presence of AC voltage from limit switches, or interfacing with AC control circuits. Industries benefiting from this module include manufacturing, power generation, and building automation.

Stanlo Automation, a trusted veteran-owned distributor, offers the Allen Bradley 1791-8AR. We specialize in providing surplus and new automation components, ensuring our customers have access to reliable parts to maintain their operational uptime.

Technical specifications

Number of Inputs	8
Input Voltage	120V AC
Isolation Voltage	500V AC
Input Current	5-10 mA
Scan Time	10 ms (typical)
Backplane Current	300 mA (typical)
Compatibility	SLC 500

Common applications

Machine Monitoring

Process Control

Factory Automation

Building Automation

Electrical Monitoring

Industrial Control

Compatible systems

SLC 500 Controllers (e.g., 1746 chassis with 1747-Lxx controllers)

Also known as

Allen-Bradley 1791-8AR AB 1791-8AR SLC 500 Input Module 1791 Series AC Input

Replaces / compatible with

The 1791-8AR is part of the Allen-Bradley SLC 500 series and is designed to expand the discrete input capabilities of compatible controllers.

Technical note

Expert tip

Ensure wiring practices adhere to local electrical codes when connecting 120V AC signals to the 1791-8AR module.

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Frequently asked questions

What is the input voltage for the Allen Bradley 1791-8AR module?

The Allen Bradley 1791-8AR is a 120V AC input module, meaning it is designed to accept and process discrete signals within the 120-volt alternating current range.