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Allen Bradley 1771-IA 8-Point 120V AC/DC Input Module

Allen Bradley 1771-IA 8-Point 120V AC/DC Input Module.

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ManufacturerAllen Bradley

Part number1771-IA

Number of Inputs 8

Voltage Category 120V AC/DC

Operating Voltage Range 77-138V AC / 77-138V DC

Typical Current 12mA @ 120V AC

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Veteran-owned

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8 discrete input points 120V AC/DC operation Optical isolation protection Selectable input filtering Status LED indicators Compatible with PLC-5

Product description

The Allen-Bradley 1771-IA is an 8-point digital input module designed for use with Allen-Bradley PLC-5 programmable controllers and the 1771 I/O chassis. It accepts 120V AC or DC signals from field devices such as push buttons and limit switches, conditioning them for the PLC processor.

This module features optical isolation for protection against voltage transients and includes selectable input filtering to minimize noise and contact bounce, ensuring reliable signal processing. The robust architecture is well-suited for demanding industrial environments.

Stanlo Automation, a veteran-owned supplier of surplus industrial parts, offers the Allen-Bradley 1771-IA. Ensure your PLC-5 system has reliable input processing by sourcing from Stanlo.

Technical specifications

Number of Inputs	8
Voltage Category	120V AC/DC
Operating Voltage Range	77-138V AC / 77-138V DC
Typical Current	12mA @ 120V AC
Isolation	Optical
Filtering	Selectable Input Filtering
Chassis	1771 I/O

Common applications

PLC Input Processing

Machine Monitoring

Industrial Control

Manufacturing Automation

Process Automation

Compatible systems

Allen-Bradley PLC-5 (all series) 1771 I/O Chassis

Also known as

Allen Bradley 1771-IA Module PLC-5 Input Card 1771 Series Input Module

Replaces / compatible with

The 1771-IA module is part of the Allen-Bradley 1771 Universal I/O family, designed for PLC-5 systems.

Technical note

Expert tip

Utilizes a 1771-WH field wiring arm for simplified wiring and module replacement in PLC-5 chassis.

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Frequently asked questions

What type of signals does the Allen Bradley 1771-IA module accept?

The Allen Bradley 1771-IA module accepts 120V AC or DC digital input signals. It is designed to interface with common industrial devices like push buttons, limit switches, and motor starters.