Overview
The Allen-Bradley 1756-IB16 is a ControlLogix discrete input module that integrates 16 isolated 12/24V DC input points into the Bulletin 1756 CompactLogix and ControlLogix processor backplane. This 10–31V DC ControlLogix digital input module has 16 points and employs current sinking logic. The module is engineered for input and communication status and module health display, enabling rapid troubleshooting in production environments.
Key Features
- 16 individually isolated input channels — Each point is individually isolated, reducing noise coupling and improving system reliability.
- 10–31V DC input range — Accepts input voltage from 10–31V DC, accommodating standard 12V and 24V industrial DC sources.
- Current sinking configuration — Designed for standard industrial push-button, limit switch, and sensor inputs.
- Chassis-mount form factor — Mounts directly on the 1756 chassis backplane with no external enclosure required.
- Fast response time — Response time of 0.29–18 milliseconds enables high-speed event capture and control transitions.
- Screw/spring-clamp termination — Uses screw or spring-clamp connections for tool-free or minimal-tool installation.
Technical Specifications
| Module Type | Digital Input (16-point) |
| Input Voltage Range | 10–31V DC |
| Number of Input Points | 16 channels |
| Logic Type | Current Sinking |
| Per-Channel Current | 2 mA nominal |
| Response Time | 0.29–18 milliseconds |
| Backplane Current Draw | 295 mA @ 5.1V DC; 2 mA @ 24V DC |
| Backplane Power Consumption | 1.5 W |
| Maximum Power Dissipation | 5.5 W @ 60°C |
| Operating Temperature | 0 to 60°C |
| Mounting Type | 1756 chassis backplane |
| Terminal Connection | Screw/Spring Clamp |
| Display | Input and Communication Status, Module Health Indicators |
| Certifications | CE, CSA, KC, MARINE, NRTL, RCM, UL |
| Isolation | Per-point isolated inputs |
Typical Applications
The Allen-Bradley 1756-IB16 suits machine control, process automation, and packaging line applications where discrete 12/24V DC sensor and switch inputs must feed a ControlLogix processor. Common uses include:
- Limit switch and push-button signal acquisition
- Proximity and inductive sensor input capture
- Safety interlock and status monitoring
- Production line conveyor and motor control feedback
- Building automation and HVAC system integration
Compatibility & Replacements
Compatible With
- Bulletin 1756 ControlLogix digital I/O modules within a single chassis or linked over EtherNet/IP
- CompactLogix 5380 and ControlLogix 5580 processors
- Studio 5000 Logix Designer engineering software
- EtherNet/IP industrial networks
- 1756 analog, communication, and specialty modules
Replaces / Drop-In Replacement For
Verify compatibility with your system integrator before ordering. Earlier or region-specific variants may differ in firmware revision or certification set.
Works With
- Studio 5000 Logix Designer (RSLogix 5000)
- Connected Components Workbench
- EtherNet/IP protocol and industrial networks
- Allen-Bradley CompactLogix and ControlLogix chassis and power supplies
- OPC server and MES/SCADA platform connectivity via gateway
