Allen-Bradley 1756-IB16 | ControlLogix Series Digital Input Module

Overview

The 1756-IB16 is a 16-point digital input module from Allen-Bradley’s ControlLogix family, designed for reliable DC signal acquisition in demanding industrial automation environments. Supporting both 12V and 24V DC inputs, this module ensures stable and noise-immune signal detection, making it ideal for applications requiring precise and isolated input processing.

Technical Specifications

• Manufacturer: Allen-Bradley

• Model / Part Number: 1756-IB16

• Module Type: Digital Input Module, ControlLogix Series

• Number of Inputs: 16 points

• Voltage Category: 12/24V DC sink/source

• Operating Voltage Range: 10…30V DC

• Nominal Input Voltage: 24V DC

• Input Delay Time:

• Off to On: 0.8 ms typical

• On to Off: 1.0 ms typical

• Backplane Current Draw: 90 mA @ 5.1V DC

• Total Power Dissipation: 0.46 W

• Isolation Voltage: 250V (continuous), basic insulation between field-side and backplane; type-tested at 1350V AC for 2 seconds

• Off-State Leakage Current: 1.5 mA max

• Input Current (On-State): 8 mA typical @ 24V DC

• Logic High Signal: 10V DC min

• Logic Low Signal: 5V DC max

• Thermal Dissipation: 1.6 BTU/hr

• Slot Width: 1

• Removable Terminal Block Options: 1756-TBNH or 1756-TBSH

• Operating Temperature: 0…60°C (32…140°F)

• Storage Temperature: -40…85°C (-40…185°F)

• Enclosure Type: None (open-style)

Application Notes

The 1756-IB16 is widely used in machine control, process monitoring, and distributed I/O systems. Its fast response and reliable input isolation make it suitable for high-speed logic control, packaging lines, and automated equipment monitoring.

FAQ

Q: How many DC inputs does the 1756-IB16 support?
A: It supports 16 discrete input channels operating at 12/24V DC.

Q: Can the module be used with both sink and source configurations?
A: Yes, it supports both sink and source wiring.

Q: What terminal block models are compatible?
A: The module is compatible with 1756-TBNH and 1756-TBSH removable terminal blocks.

Q: Is the module hot-swappable within the chassis?
A: Yes, like other ControlLogix modules, it supports hot-swap installation and removal when properly configured.