Overview
The Allen-Bradley 1756-IB16 is a ControlLogix 16-point digital input module engineered for industrial automation, machine control, and process monitoring applications. This module operates as a 10-31 V DC ControlLogix digital input module with 16 points. It is current sinking, accepting sourcing PNP field devices such as proximity sensors, pushbuttons, and limit switches across two groups of eight inputs each. The module complies with global approvals including CE, CSA, UL, KC, Marine, NRTL, and RCM, ensuring compatibility with internationally deployed industrial systems.
Key Features
- 16 sinking DC digital inputs divided into two groups of eight
- Operating voltage range from 10 to 31.2 VDC, ensuring broad compatibility
- LED indicators for communication status, input activity, and module health
- Configurable on/off delay times from 0 to 18 milliseconds
- Basic insulation rated at 250 V between input groups and backplane
- Fits any slot in standard ControlLogix 1756 chassis
Technical Specifications
- Input Voltage Range: 10–31.2 V DC (nominal 24 VDC)
- Input Type: DC Sinking
- Number of Inputs: 16 (two groups of 8)
- Response Time: 0.29–18 milliseconds (selectable filter)
- Current Draw at 24 VDC: 2 mA
- Backplane Power Usage: 0.56 watts
- Operating Temperature: 0–60°C
- Mounting: ControlLogix 1756 chassis, open-style
- Terminals: Screw or spring-clamp connectors
- Display: Input and communication status, module health LEDs
- Certifications: UL, CSA, CE, KC, Marine, NRTL, RCM
Typical Applications
- Discrete 24 VDC sensor input monitoring in OEM machine control
- Automotive assembly line signal acquisition and status monitoring
- Packaging machinery limit switch and proximity sensor input
- Process automation discrete input consolidation
- Building automation and facility control systems
Compatibility & Replacements
Compatible With
- ControlLogix 1756 chassis (any available slot)
- Rockwell Studio 5000 and RSLogix 5000 programming platforms
- EtherNet/IP industrial networks
- Common Automation Controller (CAC) and CompactLogix via backplane communication
Replaces / Drop-In Replacement For
- Prior generation Allen-Bradley 1756-IB16 revisions (Series A and later)
- Legacy PLC input modules in 1756 chassis upgrades
Works With
- Studio 5000 Automation Engineering & Design Environment
- RSLogix 5000 (legacy)
- EtherNet/IP gateways and distributed I/O
- Sourcing PNP field devices (sensors, pushbuttons, dry contacts)
- 24 VDC control circuit standards
