1756-IG16 | Allen Bradley | ControlLogix 16-Point TTL Digital DC Input Module

Product Description

The Allen Bradley 1756-IG16 is a ControlLogix digital input module designed for TTL-level DC signals. With 16 input points, fast response times, and reliable backplane communication, it is ideal for applications requiring precise low-voltage signal detection. Its compact design and efficient power consumption make it suitable for high-performance automation systems.

Technical Specifications

• Manufacturer: Allen Bradley

• Category: PLCs

• Product Line: ControlLogix

• Part Number: 1756-IG16

• Weight: 0.69 lbs (0.31 kg)

• Module Type: Digital DC Input Module

• Number of Inputs: 16 points (9 per common)

• Nominal Input Voltage: 5 VDC (TTL source)

• Operating Voltage Range: 4.5–5.5 VDC

• Input Delay Time: 0.25 ms plus selectable filter time

• Maximum Off-State Input Current: 4.1 mA

• Power Dissipation (Max): 1.4 W at 60 °C

• Backplane Current Draw (5 VDC): 110 mA

Application Scenarios

• Designed for TTL-level digital input monitoring in ControlLogix systems

• Suitable for machine control, robotics, and high-speed automation environments

• Provides reliable detection of low-voltage DC signals with minimal delay

FAQ

Q: How many input points does the 1756-IG16 support?  A: It supports 16 TTL-level DC input points.

Q: What is the operating voltage range?  A: The module operates between 4.5–5.5 VDC.

Q: What is the maximum input delay time?  A: 0.25 ms plus the selected filter time.

Comparison with Similar Models

• 1756-IG16: TTL-level inputs, 16 points, 5 VDC operation

• 1756-IB16: Standard DC input module, 16 points, 24 VDC operation

• 1756-IF16: Analog input module, 16 channels, designed for voltage/current signals