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

Product Overview

The 1791-24BR is a mixed input and output block I/O module from the Allen-Bradley/Rockwell Automation 1791 Block I/O series. It features 24 DC inputs and 8 DC relay outputs, all operating at 10 to 30 Volts DC. This module is designed for reliable remote I/O applications in industrial automation.

Technical Specifications Analysis

The 1791-24BR operates with an input on-state voltage range of 10-30V dc and an input on-state current of 11mA @ 30V max. Input off-state voltage is 5V dc max, with off-state current at 1.5mA min. The module provides 8 outputs with a voltage range of 20-132V ac @ 1A resistive max. External power required is 19.2-30V dc. The module weighs 2.38 lbs (1.08 kg) and measures 6.95 x 4.35 x 3.85 inches. It has an operating temperature of 0-60 degrees Celsius, storage temperature of 40-85 degrees Celsius, and non-condensing relative humidity of 5-95%.

Application Scenarios & Usage Methods

This block I/O module is ideal for distributed control systems where remote monitoring and control are needed. Use it in manufacturing lines to manage sensors and actuators with its 24 DC inputs and 8 relay outputs. The module supports PLC-2, PLC-3, PLC-5/250, PLC-5 family, and SLC 5/02 controllers. Mount it vertically on a DIN Rail for space-efficient installation. Status indicators help monitor communication and I/O states.

Installation Guide & Packing List

Mount the 1791-24BR on a DIN Rail in a vertical orientation. Connect terminal strips on the left and right sides for remote I/O link, input/output connections, and power. Configure the I/O rack number, communication rate, starting I/O group, last state, and last chassis using the two switch assemblies. The package includes the module and terminal strips.

Purchasing Advice

When selecting the 1791-24BR, verify that your system requires 24 DC inputs and 8 DC relay outputs with the specified voltage ranges. This module is a reliable choice for expanding I/O capacity in Allen-Bradley systems. Petro Auto Tech offers this module with genuine parts and fast shipping.

Repair & Maintenance Tips

Regularly inspect the module for dust and debris, especially on terminal strips and status indicators. Keep the module within its operating temperature range of 0-60 degrees Celsius and humidity of 5-95% non-condensing. Store in a clean, dry environment between 40-85 degrees Celsius. Check connections periodically to ensure secure contact.

Frequently Asked Questions (FAQs)

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

A: The input on-state voltage range is 10-30V dc.

Q: How many outputs does this module have?

A: It has 8 DC relay outputs with a voltage range of 20-132V ac @ 1A resistive max.

Q: Can I mount this module on a DIN Rail?

A: Yes, the 1791-24BR can be mounted on a DIN Rail, and vertical mounting is recommended.

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

A: The module weighs 2.38 lbs (1.08 kg).

Q: What controllers are compatible with this module?

A: Compatible controllers include PLC-2, PLC-3, PLC-5/250, PLC-5 family, and SLC 5/02 modular controllers.