Overview
The Allen-Bradley 1756-IB16 is a standard ControlLogix 16-point digital input module that mounts directly into a 1756 chassis backplane. This module processes 12/24V DC input signals and is widely used in process control, material handling, and discrete manufacturing automation. The 1756-IB16 offers individually isolated inputs, status indication, and sub-millisecond to 18-millisecond configurable response times per point.
Key Features
- 16 individually isolated digital inputs: Each input is galvanically isolated to prevent ground loop issues and improve noise immunity.
- Wide input voltage range: Accepts 10–31V DC nominal, compatible with both 12V and 24V sensor outputs.
- Configurable response time: On/off delay times from 0.29 to 18 milliseconds per point for debouncing and filtering.
- Built-in diagnostics: Module health and input/communication status indicators for quick troubleshooting.
- Industry certifications: UL, CE, CSA, IECEx, ATEX, RCM, and FM Approved for global deployment.
Technical Specifications
| Input Points | 16 (sinking, individually isolated) |
| Input Voltage Range | 10–31V DC |
| Nominal Supply Voltage | 12/24V DC |
| Module Current Draw (5.1V DC) | 295 mA |
| Module Current Draw (24V DC) | 2 mA |
| Backplane Power Consumption | 1.5W |
| Maximum Power Dissipation | 5.5W @ 60°C |
| Response Time Range | 0.29–18 milliseconds (configurable) |
| Operating Temperature | 0–60°C |
| Mounting Type | 1756 ControlLogix Chassis Backplane |
| Terminal Connection | Screw/Spring Clamp |
| Enclosure | Open-style (module only, no separate enclosure) |
| Certifications | UL, CE, CSA, KC, MARINE, NRTL, RCM, IECEx, ATEX, FM Approved |
| Series | ControlLogix 1756 |
Typical Applications
- Discrete sensor input monitoring in production lines and assembly systems
- Safety interlocks and limit switch sensing in machinery control
- Material handling and conveyor system status detection
- Process equipment status monitoring and alarming
- Batch control and sequencing logic input acquisition
Compatibility & Replacements
Compatible With
- 1756 ControlLogix Local Chassis
- 1756 ControlLogix Remote I/O Chassis (via ControlNet or EtherNet/IP networks)
- Studio 5000 / RSLogix 5000 programming software
- ControlNet, EtherNet/IP, and serial communications networks
- 1756 Backplane power distribution and CIP communication infrastructure
Replaces / Drop-In Replacement For
- Earlier-generation 1756-IB16 series variants (check firmware compatibility)
- Verify specific model compatibility with your system integrator or Rockwell support before substitution
Works With
- Software Platforms: Studio 5000, RSLogix 5000
- Communication Protocols: EtherNet/IP, ControlNet, serial gateway options
- Add-On Profiles (AOPs): 1756 Discrete I/O v40.12.22 and later
- Firmware: 1756-IB16 v3.004 and compatible versions
