Allen-Bradley 1771-IG TTL Input Module - High-Speed Digital Interface

Connect TTL devices to your PLC-5 system with the 1771-IG module. This digital input module provides fast response times for precision control applications. Requires 5V DC power supply for TTL signal transmission.

Main Features

• Ultra-fast <1ms response time
• 8 TTL-compatible input channels
• Easy replacement with wiring arm
• Optoelectrical isolation protection
• Compact single-slot design

Technical Specifications

Brand: Allen-Bradley/Rockwell Automation

Model: 1771-IG Series A

Module Type: Digital DC Input (TTL)

Input Channels: 8 Points

Voltage Level: 5V DC TTL

Operating Range: 5.0-5.3V DC

Response Time: <1ms On / 20ms Off

Backplane Current: 122mA

External Supply: 500mA Maximum

Power Dissipation: 3.3W Maximum

Isolation: Optoelectrical

Coating: Conformal Coated

Wiring Arm: 1771-WC

Addressing: ½, 1, or 2-slot

Thermal Dissipation: 11.3 BTU/hr

Installation Guide

Single slot in 1771 I/O chassis

Uses 1771-WC wiring arm

Keying bands: pins 34-36 & 4-6

Requires external 5V DC power supply

Compatible Equipment

TTL interface devices

BCD encoders

Digital sensors

PLC-5 control systems

Package Contents

1771-IG TTL Input Module

1771-WC Wiring Arm

Installation documentation

Service & Support

12 Month Quality Guarantee

Global delivery: FedEx, UPS, DHL

Frequently Asked Questions

What power supplies does this module need?

The 1771-IG requires both backplane power from the chassis and an external 5V DC power supply for TTL signal operation.

What is the maximum response speed?

This module offers very fast response with less than 1 millisecond signal delay for high-speed applications.

Can I use this with AC voltage devices?

No, the 1771-IG is designed specifically for 5V DC TTL signals and cannot operate with AC voltage inputs.

How many input points are available?

The module provides 8 individual TTL input points, each with its own status indicator for easy monitoring.

What type of protection is included?

The module features optoelectrical isolation and input filtering to protect against electrical noise and transients.

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