1791-24AR | Allen-Bradley Block I/O Module - Petro Auto Tech

Product Overview

The 1791-24AR is a robust block I/O module from the Allen-Bradley 1791 series, designed for reliable industrial input and output operations. This module features 24 inputs and 8 relay outputs, making it ideal for controlling and monitoring machinery in automation systems. With a voltage rating of 120V AC, it integrates seamlessly into existing control architectures.

Technical Specifications Analysis

The 1791-24AR offers an input on-state voltage range of 79-132V AC with an on-state current of 12.3mA at 132V maximum. The off-state voltage is 35V maximum with a minimum off-state current of 2.3mA. For outputs, it provides 8 relay outputs with a voltage range of 20-132V AC at 1A resistive maximum. External power requirements are 85-132V AC. Weighing 2.50 lbs (1.13 kg), this module is compact for panel mounting.

Application Scenarios & Usage Methods

This module excels in discrete manufacturing, such as conveyor systems, where it monitors sensor inputs and controls relay outputs for motor starters. In packaging lines, it manages photo-eye inputs and actuates solenoids. Use the 24 inputs for limit switches and push buttons, and the 8 relay outputs for driving contactors. Always match the input voltage to the 79-132V AC range for reliable operation.

Installation Guide & Packing List

Mount the 1791-24AR on a DIN rail or panel using the provided slots. Connect wiring per the terminal diagram, ensuring external power is within 85-132V AC. The package includes the module and mounting hardware. Refer to the user manual for detailed wiring and configuration steps.

Purchasing Advice

When selecting the 1791-24AR, verify that your system voltage matches the 120V AC nominal input. For applications requiring 24 inputs and 8 relay outputs, this module offers a cost-effective solution. Petro Auto Tech provides genuine Allen-Bradley parts with fast shipping and expert support.

Repair & Maintenance Tips

Periodically inspect the module for dust or debris and clean with a dry cloth. Check connections for tightness and verify input/output signals with a multimeter. Store in a dry environment to prevent corrosion. Replace the module if relay contacts show signs of wear or arcing.

Frequently Asked Questions (FAQs)

Q: What is the input voltage range for the 1791-24AR?

A: The input on-state voltage range is 79-132V AC, with a nominal voltage of 120V AC.

Q: How many outputs does this module have?

A: It has 8 relay outputs, each rated for 20-132V AC at 1A resistive maximum.

Q: What is the weight of the 1791-24AR?

A: The module weighs 2.50 lbs (1.13 kg).