Allen-Bradley 1771-IG TTL Input Module - 8 Channel Digital Interface
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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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