Overview
The Allen-Bradley 1794-IB16D is a FLEX I/O 16-point digital input module designed for industrial automation systems requiring reliable signal acquisition and comprehensive diagnostic capabilities. This module accepts sinking current inputs at 24VDC and includes diagnostics for detecting sensor power shorts, open wires, and reverse polarity conditions—critical features for reducing commissioning time and troubleshooting in production environments.
Key Features
- 16 sinking current input channels with 24VDC nominal operation
- Built-in diagnostics: sensor power open/short detection and open wire monitoring
- Wide operating voltage range: 10-31.2V DC
- Provides up to 50 mA sensor power per channel
- Detects open wire faults down to 50 µA sensitivity
- Bicolor fault indicators for channel and module-level diagnostics
- Isolated optocoupler architecture protects against field-side voltage transients
- On-state current: 1.5 mA maximum per input
Technical Specifications
The 1794-IB16D delivers industrial-grade performance with environmental resilience and certifications for hazardous locations. All specifications are drawn from official Rockwell Automation documentation and installation manuals.
Typical Applications
- Discrete sensor signal acquisition in assembly and packaging automation
- Machine tool safety interlock monitoring and limit switch interfaces
- Conveyor and material handling position and motion detection
- Pump and valve status monitoring in process automation
- Class I, Division 2 hazardous location installations requiring diagnostics
- Multi-point system integration with FLEX I/O terminal base platforms
Compatibility & Replacements
Compatible With
- FLEX I/O terminal base units: 1794-TB32, 1794-TB32S, 1794-TB62DS, 1794-TB62EXD4X15
- FLEX I/O networked systems supporting EtherNet/IP communication
- Rockwell Automation RSLogix 5000 / Studio 5000 development environments
- CompactLogix, ControlLogix, and FlexLogix controller platforms
Replaces / Drop-In Replacement For
- 1794-IB16 (non-diagnostic input module)
- Earlier generation 16-point input modules in FLEX I/O systems where diagnostic capability is required
Works With
- RSLogix 5000 and Studio 5000 software for configuration and monitoring
- EtherNet/IP protocol for remote I/O communication
- FLEX Basket system architecture and module stacking
- Allen-Bradley information integration platforms for real-time diagnostics data collection
