Overview
The Allen-Bradley 1794-IB16 /A FLEX I/O 16-point digital input module is designed for the Bulletin 1794 FLEX I/O automation platform. This module is an input module designed specifically for the FLEX I/O system, providing 16 sink inputs at 24VDC. Manufactured by Allen Bradley, the 1794-IB16 serves as a digital input module within the Flex I/O 1794 series and accommodates 16 sinking current inputs, suitable for integration into various control systems. The module supports IEC 61131-2 Type 3 compatible sinking inputs, making it ideal for industrial automation, discrete manufacturing, material handling, and process control applications.
Key Features
- Up to eight (8) 1794-IB16 modules may be installed in a single Flex I/O rack
- Only supports sink wiring configuration
- Nominal input impedance of 4.6 kiloohms promoting optimal signal integrity, with a continuous isolation voltage rating of 50 volts and basic insulation
- Supports all available Flex I/O communication adapters
- SIL2 Rated module for functional safety applications
- Interfaces with PNP sourcing sensors, provides up to 50 mA to power an attached sensor, and detects open wire conditions down to 50 µA
Technical Specifications
The module operates with a minimum operational voltage of 10 volts DC, nominal voltage of 24 volts DC, and maximum operational voltage of 31.2 volts DC. On-state current ranges from a minimum of 2 mA to a nominal 8 mA and maximum 12 mA. Off-state voltage rating is 5 volts DC maximum, with off-state current limitation of 1.5 mA. Operating temperature range is 32–131 degrees Fahrenheit (0–55 degrees Celsius), with DIN-rail or panel mounting options and screw terminal connections.
Typical Applications
- Discrete signal acquisition from push buttons, limit switches, and proximity sensors
- PLC input circuits requiring sinking logic configuration
- Industrial machine control and equipment monitoring
- Production line automation and supervisory control
- Safety-rated systems requiring SIL2 certification
Compatibility & Replacements
Compatible With
- Allen-Bradley FLEX I/O 1794 rack systems
- FLEX EX I/O (Extended Environment) platforms
- FLEX XT I/O systems
- All Flex I/O communication adapters
- PLC controllers supporting FLEX I/O module protocols
Replaces / Drop-In Replacement For
The 1794-IB16 /A is the standard version of this module. Verify compatibility with your system integrator before ordering if replacing legacy installations.
Works With
- Rockwell Automation Studio 5000 and RSLogix platforms
- EtherNet/IP and devicenet communication protocols
- FLEX I/O communication modules and adapters
- Allen-Bradley CompactLogix, ControlLogix, and MicroLogix controllers
