Manufacturer	Rockwell Automation (Allen-Bradley)
Part Number	1791-0A32
Product Line	1791 Block I/O
Module Type	Digital AC Output Module
Outputs per Block	32
Channel Grouping	4 groups of 8 channels
Nominal Output Voltage	120 VAC
Output Voltage Range	20-132 VAC
External Power	85-132 VAC
Output Delay Time, OFF to ON	1.0 ms at 60 Hz; 1.0 ms at 50 Hz
Output Delay Time, ON to OFF	8.3 ms at 60 Hz; 10.0 ms at 50 Hz
OFF state leakage current	3 mA
Maximum On-state Current	50 mA per output
Surge Current	10 A for 50 ms, repeatable every 2 sec
Max. On-state Voltage Drop	1.5 V peak @ 300 mA
Dimensions	6.95 x 4.35 x 3.85 in
Weight	2.31 lbs (1.05 kg)
Mounting Orientation	Vertical and Horizontal
Communication Protocol	Remote I/O (RIO)
Compatible Controllers	PLC-2, PLC-3, PLC-5/20, and PLC-5
Operating Temperature	0 to 60 degrees Celsius
Product Lifecycle Status	Discontinued/Obsolete

What is the output configuration of the 1791-0A32 module?

The 1791-0A32 is a digital AC output module featuring 32 discrete outputs organized into four groups of eight channels each.

What is the operating voltage range for the 1791-0A32?

The module has a nominal output voltage of 120 VAC and an operating voltage range of 20-132 VAC. It requires an external power supply of 85-132 VAC.

Which controllers are compatible with the 1791-0A32?

The 1791-0A32 is compatible with PLC-2, PLC-3, and PLC-5/20 controllers. It functions as a slave device using the Remote I/O (RIO) protocol to communicate with RIO scanners.

What are the output delay times for the 1791-0A32?

The output delay time from OFF to ON is 1.0 ms at both 60 Hz and 50 Hz. The delay time from ON to OFF is 8.3 ms at 60 Hz and 10.0 ms at 50 Hz.

What is the maximum on-state current per output for the 1791-0A32?

The maximum on-state current is 50 mA per output, with a minimum on-state current of 50 mA per output. The maximum on-state voltage drop is 1.5 V peak at 300 mA.

What are the physical dimensions and mounting options for the 1791-0A32?

The module measures 6.95 x 4.35 x 3.85 inches and supports both vertical and horizontal mounting orientations.

Does the Allen-Bradley 1791-0A32 come with a warranty?

Yes. The 1791-0A32 is backed by our 24-Month Replace Industrial Warranty, with no rush fees or hidden warranty charges. If a unit fails under normal use within the warranty period, we repair or replace it.

Is this 1791-0A32 a genuine Allen-Bradley part?

The 1791-0A32 is sourced and verified independently. Replace Industrial, LLC is not a Rockwell Automation Authorized Distributor, and all warranties are provided directly by Replace Industrial.

Is the Allen-Bradley 1791-0A32 new or used?

We offer the 1791-0A32 in multiple conditions, from unused surplus to professionally reconditioned units. Every option is sourced and verified independently and covered by our 2-year replacement warranty.

What are the key ratings of the 1791-0A32?

The 1791-0A32 communicates over Remote I/O (RIO) and operates across 0 to 60 degrees Celsius.

What is the Allen-Bradley 1791-0A32?

The 1791-0A32 is an Allen-Bradley Block I/O Digital AC Output Module.

Allen-Bradley

1791-0A32

Rate this product

PLCs Block I/O

The Allen-Bradley 1791-0A32 is a discontinued Block I/O module by Rockwell Automation, offering 32 outputs with a voltage range of 20-132V AC. This compact unit measures 6.95 x 4.35 x 3.85 inches, requiring an external power supply of 85-132V AC, providing reliable performance with an output signal delay of 8.3ms on at 60Hz.

PDF

We currently only collect tax from customers in the state of North Carolina. If you are exempt on your purchase, please email your Sales Tax & Use Exemption Form to sales@replacenc.com.
If you are checking out via a quote we send you, there is an option to upload your form at the time of purchase.

If you have already placed an order, please send us your form and we can refund the charged taxes.

Overview of Allen-Bradley 1791-0A32

The Allen-Bradley 1791-0A32 is a discontinued 120V AC discrete output module from the 1791 Block I/O product line. Designed as a self-contained remote I/O device, it integrates a power supply, programmable controller interface, and signal conditioning circuitry into a compact form factor measuring 6.95 x 4.35 x 3.85 inches.

This module functions as a slave device in a distributed I/O configuration, supporting the Remote I/O (RIO) protocol for direct communication with RIO scanners. It is currently listed as obsolete by the manufacturer, with discontinuation noted in 2015.

Key Features

The 1791-0A32 features 32 discrete AC output channels organized into four groups of eight channels each. It supports both vertical and horizontal mounting orientations and includes status indicators on the front cover to assist with troubleshooting and configuration.

The module includes internal protection and an interior power supply, requiring an external power source of 85-132V AC. It is designed to energize a variety of electrical loads, including motor starters, solenoid-actuated devices, indicators, and signaling devices.

Performance and Capacity

Rated for a nominal output voltage of 120V AC, the module operates within a voltage range of 20-132V AC. The maximum on-state current is 50 mA per output, with a minimum on-state current of 50 mA per output. The maximum on-state voltage drop is 1.5V peak at 300 mA.

Output signal delay is 8.3 ms at 60 Hz for the ON state and 10.0 ms at 50 Hz for the OFF state. The module can handle a surge current of 10 A for 50 ms, repeatable every 2 seconds, and has an OFF-state leakage current of 3 mA. The operational temperature range is 0 to 60 degrees Celsius.

Installation and Compatibility

The 1791-0A32 is compatible with a variety of Allen-Bradley controllers, including the PLC-2, PLC-3, and PLC-5/20 families. Specific compatible scanner modules include the 1771-SN, 1772-SD, 1772-SD2, 1775-S5, and 1775-SR5. Power connections are made via terminals L1, N, and GND, while RIO connections use terminals BLU, CLR, and SHD located on the left side of the module.

Installation requires setting the I/O rack number and group switch assembly, which are accessible by opening the front cover. The module supports the Remote I/O (RIO) protocol, allowing it to function as a distributed I/O station within a network.

Applications and Industries

As a high-density AC output module, the 1791-0A32 is suitable for industrial automation applications requiring the control of multiple AC loads. It is commonly used in manufacturing, process control, and machine control environments where reliable switching of motor starters and solenoids is required.

The module's compact design and integrated power supply make it a cost-effective solution for expanding I/O capacity in existing PLC systems, particularly in applications where space is limited and vertical or horizontal mounting flexibility is needed.