A-B 1794-IB16 Digital Input Module

Allen-Bradley 1794-IB16 Digital Input Module (Flex I/O)

 

 

The Allen-Bradley 1794-IB16 is a 16-point 24V DC Flex I/O digital input module used in distributed I/O systems. It collects ON/OFF signals from field devices such as sensors, pushbuttons, and switches, and sends them back to the PLC through a Flex I/O adapter (e.g., 1794-AENTR, 1794-ACN, etc.).

Key Specifications

• Model: 1794-IB16
• Brand: Allen-Bradley (Rockwell Automation)
• Series: Flex I/O 1794
• Product Type: Digital Input Module
• Input Channels: 16 points
• Input Type:
  • 24V DC sinking inputs
• Input Voltage Range:
  • 10 – 31.2 VDC
• Nominal Input Voltage:
  • 24V DC
• System Type:
  • Remote/distributed I/O (Flex I/O platform)
• Mounting:
  • Flex terminal base (e.g., 1794-TB3, TB3S)
• Communication:
  • Via Flex I/O adapter (EtherNet/IP, ControlNet, DeviceNet, etc.)

(verified from Rockwell product documentation)

What it does (simple explanation)

Sensor / Switch
↓
1794-IB16 Input Module
↓
Flex I/O Adapter (e.g., 1794-AENTR)
↓
PLC CPU (ControlLogix / CompactLogix)

It simply reads 16 digital ON/OFF signals and sends them over the network to the PLC.

Main Functions

• Reads discrete 24V DC input signals
• Interfaces with industrial sensors and switches
• Sends status signals to PLC via remote adapter
• Supports distributed control cabinet architecture
• Provides real-time machine input feedback

Key Features

• 16-channel high-density input design
• 24V DC industrial standard compatibility
• LED status indicators per channel
• Modular Flex I/O system (easy expansion)
• Hot-swap capability (RIUP in many configurations)
• Compatible with multiple network adapters

Applications

• Factory automation systems
• Conveyor systems
• Packaging machines
• Remote I/O panels
• Process control systems
• Machine status monitoring