Allen‑Bradley 1794‑IB16 Flex I/O Digital Input Module

The Allen‑Bradley 1794‑IB16 is a Flex I/O series discrete digital input module for distributed automation control systems. It collects DC digital switch signals from field devices and transmits status data to the main controller for logic processing.

This module adopts opto‑coupler isolation design to resist industrial electromagnetic interference, equipped with channel status LED indicators. It is a widely‑used spare part for maintenance and retrofitting of Rockwell distributed Flex I/O automation cabinets.

Main Specifications

• Brand: Allen‑Bradley; Model:1794‑IB16; Type: Flex I/O Digital Input Module
• Applicable System: Rockwell Flex I/O distributed station system
• Signal Type: 24V DC discrete digital input, 16 channels
• Function: Field switch signal acquisition, opto‑isolation and status data transmission
• Feature: Opto‑coupler isolation, channel LED status indication
• Installation: Mounted on Flex I/O terminal base unit
• Operating Environment: 0℃ ~ +60℃, 5%‑95% RH non‑condensing
• Certifications: CE, compliant with industrial automation standards

Core Functions

• Capture on‑off signals from field push‑buttons, limit switches and relay contacts.
• Optical isolation separates field circuit from control side to suppress site electromagnetic noise.
• Send collected input status data to host controller via Flex I/O adapter bus.
• On‑board LED lights show real‑time channel status for quick field inspection.
• Module can be replaced without removing field wiring on matched terminal base.
• Support I/O configuration and diagnostic reading through Rockwell programming software.

Application Scenarios

• Distributed automation projects adopting Rockwell Flex I/O solution.
• Discrete signal collection for manufacturing, chemical, power and metallurgy industries.
• Retrofit and spare replacement of legacy Allen‑Bradley Flex I/O automation platforms.
• Field station overhaul and digital input channel fault‑repair projects.
• Spare parts inventory for automation integrators and engineering contractors.

• Global aftermarket spare supply for technical teams maintaining Allen‑Bradley industrial hardware.