Allen‑Bradley 1756‑IB16 ControlLogix Digital Input Module 16 Point 24V DC

16‑point sinking digital input module for ControlLogix systems, providing 24V DC discrete signal acquisition for sensors, pushbuttons, and limit switches in industrial automation.

The Allen‑Bradley 1756‑IB16 is a digital input module in the ControlLogix 1756 I/O family. It features 16 sinking inputs with 24V DC nominal operation (10‑31.2V DC range), optical isolation, and removable terminal blocks for fast field wiring. Compatible with ControlLogix 5570/5580 controllers, this module is widely used for discrete signal monitoring in factory automation and process control. Used in ControlLogix automation systems with PLC, I/O, HMI, and industrial network components.

Applications:

• 24V DC sensor and pushbutton monitoring

• Limit switch and proximity sensor signal acquisition

• Conveyor and material handling input status

• Machine control panel discrete inputs

• Safety interlock monitoring (non‑safety rated)

Key Features:

• 16 sinking input channels (24V DC)

• Input voltage range: 10‑31.2V DC (nominal 24V DC)

• Optical isolation between inputs and backplane

• Removable terminal block (1756‑TBCH or 1756‑TBS6H)

• Built‑in input filtering and diagnostics

• 0°C to 60°C operating temperature

Technical Specifications:

• Inputs: 16 (sinking)

• Voltage: 24V DC (10‑31.2V DC range)

• Input current: 4.7 mA typical at 24V DC

• Off‑state max voltage: 5V DC, leakage 1.5 mA max

• Backplane current: 120 mA @ 5.1V DC, 2 mA @ 24V DC

• Power dissipation: 6.2 W max

• Isolation: 250V continuous (input to backplane)

• Mounting: ControlLogix chassis

• Operating temperature: 0°C to 60°C

• Terminal block: 1756‑TBCH (screw) or 1756‑TBS6H (spring)

System Integration:

• PLC Controllers: ControlLogix 5570 (1756‑L7x), 5580 (1756‑L8x)

• I/O System: 1756 ControlLogix I/O family

• Power Supply: 1756‑PA72 (AC) or 1756‑PB72 (DC)

• Chassis: 1756‑A4, A7, A10, A13, A17

• Software: Studio 5000 / RSLogix 5000

Related Products:

• Controller: 1756‑L83E ControlLogix – system core

• Digital Output: 1756‑OB32 Digital Output Module – output pairing

• Analog Input: 1756‑IF16 Analog Input Module – mixed signal

• Terminal Block: 1756‑TBCH Screw Terminal Block – wiring accessory

PLC ERA is an independent industrial automation distributor. Products are sourced from established supply channels and inspected before shipment. International shipping available.