Overview
The Allen-Bradley 1756-IB16 /A is a single-slot ControlLogix digital input module engineered for discrete signal monitoring in industrial automation systems. With 16 individually isolated input points rated for 10–31 VDC (nominal 24 VDC), this current-sinking module integrates seamlessly into any 1756 ControlLogix chassis and supports local, remote, and distributed I/O architectures.
Key Features
- 16 discrete input channels, organized in two groups of 8 points each
- Input voltage range 10–31 VDC (12/24 V DC category) with 2 mA input current at 24 VDC
- Built-in input status and module health display for troubleshooting
- Current sinking design for interfacing pushbuttons, switches, and auxiliary contacts
- Single-slot chassis module with low power dissipation (5.5 W @ 60°C)
- Response time 0.29–18 ms for signal filtering and debouncing
Technical Specifications
- Input Channels: 16 (individually isolated)
- Input Voltage Range: 10–31 VDC
- Nominal Input Voltage: 24 VDC (12/24 V DC category)
- Input Current: 2 mA @ 24 VDC; 100 mA @ 5.1 VDC
- Off-State Max Current: 1.5 mA
- Off-State Max Voltage: 5 V
- Backplane Power: 1.5 W (0.56 W typical)
- Max Power Dissipation: 5.5 W @ 60°C
- Thermal Dissipation: 17.22 BTU/hr
- Response Time: 0.29–18 ms (filter selectable)
- Operating Temperature: 0–60°C
- Module Type: Digital Input (current sinking)
- Mounting: 1756 ControlLogix chassis backplane (single slot)
- Certifications: UL, CSA, CE, KC, MARINE, NRTL, RCM
Typical Applications
The 1756-IB16 is suited for:
- Discrete sensor and switch input acquisition in machine control
- Push-button and operator interface signal monitoring
- Auxiliary contact and limit switch integration
- Safety circuit monitoring and alarm signals
- Remote and distributed I/O in networked ControlLogix systems
- OEM equipment and panel builder applications requiring reliable 24 VDC input capture
Compatibility & Replacements
Compatible With
- 1756 ControlLogix chassis (all models: 1756-A10, 1756-A13, 1756-A16, 1756-A17, etc.)
- Allen-Bradley RSLogix 5000 / Studio 5000 programming software
- EtherNet/IP communication networks
- Removable Terminal Block (RTB): 1756-TBCH, 1756-TBS6H
- Local, remote, and distributed ControlLogix I/O architectures
Replaces / Drop-In Replacement For
The 1756-IB16 is the standard non-isolated 16-point input module. For isolated input versions, see 1756-IB16I (individually isolated). Verify compatibility with your system integrator before ordering.
Works With
- RSLogix 5000 and Studio 5000 Logix Designer
- EtherNet/IP and ControlNet communication
- CompactLogix bridge modules (1756-ENxT adapters)
- DeviceNet and other industrial protocols via gateway modules
