1. Product Overview

The Allen-Bradley 1756-IB16 is a 32-point DC digital input module from Rockwell Automation’s ControlLogix series, designed for industrial automation. It supports 12-24V DC sink inputs with high-speed response, ideal for discrete manufacturing, process control, and machine automation.

2.Technical specifications for 1756-IB16

Manufacturer：Rockwell Automation

Brand：Allen-Bradley

Part Number/Catalog No.：1756-IB16

Series：ControlLogix

Inputs：16

Module Type：Digital DC Input Module

No. of Inputs：Thirty-Two (32) Inputs

Input Voltage：12-24 Volts DC Sink

Operating Voltage Range：10-31.2 Volts DC

Module Keying：Electronic

Maximum Operating Current：10 milliamperes at 31.2 Volts DC

Input Delay Time：2 milliseconds plus selected filter time

Maximum Input Current, Off-State ：1.5 milliamperes

Minimum Operating Current：2 milliamperes at 10 Volts DC

Input Delay Time, OFF to ON： Hardware delay: 290 µs nom/1 ms max + filter time

Input Delay Time, ON to OFF ：Hardware delay: 700 µs nom/2 ms max + filter time

Power Dissipation (Max) ：5.1 W @ 60 °C (140 °F)

Backplane Current at 24 Volts ：2 milliamperes

Backplane Current at 5.1 Volts： 120 milliamperes

UPC ：10612598171290

Thermal Dissipation：21.1 BTU/hr @ 60 °C (140 °F)

Removeable Terminal Block(s)：1756-TBCH 1756-TBS6H

3. Competitive Advantages

✅ High-Speed: <1ms switching for precision control.

✅ High-Density: 32 inputs in single slot, saving cost.

✅ Robust Design: 10-31.2V DC range for unstable power environments.

✅ Easy Maintenance: Hot-swappable terminals (with ControlLogix chassis).

✅ Rockwell Ecosystem: Native integration with Studio 5000 & FactoryTalk.

4.  Core competitive advantage

✅ High-Speed Response: <1ms switching time, ideal for high-speed production lines and precision control applications.

✅ High-Density Design: 32 input points in a single slot, saving rack space and reducing system costs.

✅ Wide Voltage Compatibility: 10-31.2V DC input range ensures stable operation even with fluctuating industrial power supplies.

✅ Strong Noise Immunity: Electronic keying + adjustable filtering minimizes false triggering risks.

✅ Easy Maintenance: Removable terminal blocks support hot-swapping (when used with ControlLogix backplane).

✅ Seamless Rockwell Integration: Fully compatible with Studio 5000 and FactoryTalk for streamlined programming and debugging.

5.  Selection and compatibility

• Terminal Blocks: Requires 1756-TBCH (standard) or 1756-TBS6H (high-protection) terminal blocks.
• System Integration: Designed for ControlLogix chassis, works seamlessly with other 1756 series I/O modules.
• Alternative Models: For sourcing input requirements, consider 1756-IB32 (32-point sourcing input module in the same series).

Note: For detailed wiring diagrams, refer to Rockwell Automation’s official documentation.