Allen-Bradley | 1746-IA16| SLC 500

Product Description: Allen-Bradley 1746-IA16

The Allen-Bradley 1746-IA16 is a 16-channel AC digital input module designed for the SLC 500 programmable logic controller system. It supports 120V AC input signals at 50/60 Hz and is used for interfacing field devices such as mechanical switches, pushbuttons, and sensors that operate on AC voltage. With robust channel isolation and diagnostic features, this module ensures reliable signal detection in industrial control applications.

Key Features

• 16 discrete AC input channels
• Accepts nominal 120V AC signals (range: 79–132V AC)
• Compatible with a wide range of AC-powered field devices
• LED indicators for per-channel status visibility
• Optically isolated channels to protect controller electronics
• Removable terminal block for easy maintenance
• Supports use in all SLC 500 chassis and processors

Technical Specifications

• Number of Inputs: 16
• Input Voltage Range: 79–132V AC
• Frequency: 47–63 Hz
• On-State Voltage: ≥79V AC
• Off-State Voltage: ≤20V AC
• On-State Current: 6 mA nominal
• Backplane Current Draw: 75 mA at 5V DC
• Isolation Voltage: 1500V RMS (field to backplane)
• Operating Temperature: 0°C to 60°C
• Module Width: 1 slot

Application Areas

• Discrete signal input for industrial control panels
• AC-powered switches and sensors integration
• HVAC and lighting control systems
• Packaging and conveyor line automation
• General manufacturing process control

Advantages

• High-density 16-channel design reduces I/O module count
• Stable AC signal monitoring for industrial environments
• Optical isolation enhances reliability and electrical protection
• Simple wiring and replacement using removable terminal block
• Seamless integration into the Allen-Bradley SLC 500 platform