1791-32AO Allen Bradley AC Block I/O Module
Specification
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Product Description
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The Allen-Bradley 1791-32A0 is a high-density AC input Block I/O module designed for industrial PLC systems to interface many field devices
(e.g., switches or sensors) with a programmable controller via Remote I/O (RIO) communications. It is part of the legacy
1791 Block I/O family and supports distributed I/O architectures.This module is self-contained with
onboard signal conditioning, status indicators, and removable terminal strips for wiring.
It communicates high-density input status to PLCs remotely without
long wiring back to the controller.
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| More Technical Data |
| Inputs per Block |
32 (4 groups × 8 channels)
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| On-State Voltage Range |
79–132 VAC
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| Signal Delay |
~1 ms Off-to-On; up to ~26 ms On-to-Off (allows half-cycle dropout)
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| Frequently Asked Questions |
Q: What is the main function of the 1791-32A0?
A: It collects 32 AC digital input signals from field devices (like switches) and communicates them to a PLC via Remote I/O. It serves as a
high-density remote input station in distributed automation systems.
Q: Can this module be used with modern Allen-Bradley PLCs?
A: It is part of the legacy 1791 Block I/O family and was originally designed for PLC-2, PLC-3, PLC-5, and older systems with
Remote I/O support. It may not be directly compatible with modern platforms like
CompactLogix or ControlLogix without legacy interfaces.
Q: Is 1791-32A0 still manufactured?
A: No. This module has been discontinued/obsolete by Allen-Bradley.
Available units today are typically surplus or refurbished.
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About Moore
At Moore Automation LIMITED is a leading global supplier of control system components.
We specialize in control systems and drives. With many years of experience in the industrial sector,
we consistently deliver the highest quality of spare parts.We have tens of thousands of spare parts
and spare parts warehouse. Products and services to serve for installing of users control system,
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