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  • 1771-IN
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1771-IN

Allen-Bradley 1771-IN Digital Input Module PLC 5 8 Input

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  • Manufacturer: Allen-Bradley

  • Product No.: 1771-IN

  • Product Type: Input Module

  • Product Origin: USA

  • Payment:T/T, Western Union

  • Weight: 450g

  • Shipping port: Xiamen

  • Warranty: 12 months

30 günlük yzyna gaýtaryş syýasaty · 12 aýlyk kepillik
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Product Overview

The Allen-Bradley 1771-IN is a digital AC input module for the PLC 5 series. Weighing approximately 450 g, it provides 8 input channels in a single slot, interfacing with pushbuttons, limit switches, pilot lights, motor starters, and enunciators.

Key Features

8 inputs with 12-28 V AC operating voltage. Backplane current of 80 mA with maximum AC off state current of 2.8 mA. AC signal delay of 18 ms typical for both on and off states. Compatible with 1771-WA wiring arm. Rack mountable design. Electrical optical isolation and filter circuits aid system troubleshooting.

Technical Specifications

Manufacturer Rockwell Automation
Brand Allen-Bradley
Part Number 1771-IN
Module Type Digital AC/DC Input Module
Number of Inputs 8
Voltage Category 24 V AC/DC
AC Operating Voltage 12-28 V
DC Operating Voltage N/A
Backplane Current 80 mA
Max AC Off-State Current 2.8 mA
Max DC Off-State Current N/A
Typical AC Signal Delay (On) 18 (±10) ms
Typical AC Signal Delay (Off) 18 (±10) ms
Wiring Arm 1771-WA
Mounting Rack Mountable
Power Dissipation 0.4 W min, 5.4 W max
Weight Approximately 450 g

Installation Guide

Mount the 1771-IN (approx. 450 g) in a Bulletin 1771 chassis, occupying one slot. Connect field devices to the 8 inputs using the 1771-WA wiring arm. Verify AC input voltage stays within 12-28 V for reliable on state operation. Keep off state current below 2.8 mA to prevent false triggering. Use the configuration plug to select fault mode behavior for output failure.

Engineering Advantages

Single slot design saves chassis space in PLC 5 systems. Lightweight 450 g construction reduces rack strain. Electrical optical isolation protects the processor from field transients. Front panel indicator lights show ON/OFF status of every input for quick diagnostics. Fault mode selection via configuration plug allows last state or reset behavior. Compatible with all current Allen-Bradley programmable controllers.

Frequently Asked Questions

Q1: How many inputs does the 1771-IN provide?

A1: It provides 8 digital AC input channels in a single slot.

Q2: What is the AC operating voltage range?

A2: It accepts 12-28 V AC for on state operation.

Q3: Does this module support DC input voltage?

A3: No, the 1771-IN is an AC only input module with no DC operating voltage.

Product Resources

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🏷️ Tags: Input Module
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