1756-IG16 Allen-Bradley | ControlLogix TTL Input Module

Allen-Bradley 1756-IG16 – 16-Channel TTL Input Module

Key Features

• 16 high-speed inputs for digital signals
• Works with 4.5-5.5V DC TTL logic
• Ultra-fast 0.25ms response time
• Low-true logic (0V = ON)
• Compact single-slot design

Technical Specifications

• Input Type: DC TTL (low-true)
• Voltage Range: 4.5-5.5V DC
• Input Current: 3.7mA typical
• Response Time: 0.25ms + filter time
• Filter Options: 0ms, 1ms, 2ms selectable
• Terminal Blocks: 1756-TBNH or 1756-TBSH
• Power Use: 1.4W max
• Input Groups: 8 points per common
• Operating Temp: 0°C to 60°C

Easy Installation

• Fits any 1756 ControlLogix chassis
• Simple wiring with terminal blocks
• LED status indicators

Download Complete Manual

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Expert Answers

1. What does “low-true” mean?
   0V = ON (active low), 5V = OFF logic.
2. Can I connect microcontroller outputs?
   Yes, perfect for 5V logic interfaces.
3. How does input filtering work?
   Selectable 0ms, 1ms or 2ms noise filtering.
4. What’s the maximum wire length?
   Recommended under 15m for best performance.
5. Is this module good for sensors?
   Ideal for proximity and limit switches.

Package Contents

• 1x 1756-IG16 input module
• Installation guide

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