Allen-Bradley 1746-IA16 SLC 500 AC Input Module 16-Point 120V

Allen-Bradley 1746-IA16 SLC 500 AC Input Module Overview

The Allen-Bradley 1746-IA16 is a high-performance 16-point AC input module designed for SLC 500 programmable logic controller systems. This industrial-grade module provides reliable signal acquisition for 100/120V AC applications in manufacturing, process control, and automation environments.

Technical Specifications

• Input Points: 16 isolated AC inputs
• Voltage Rating: 100-120V AC, 50/60 Hz
• Input Current: 7 mA typical at 120V AC
• Input Impedance: 17k © nominal
• On-State Voltage: 79-132V AC
• Off-State Voltage: 0-20V AC
• Response Time: On-delay 25ms max, Off-delay 25ms max
• Isolation: 1500V AC optical isolation between input and backplane
• Power Consumption: 150 mA at 5V DC from backplane
• Operating Temperature: 0 °C to 60 °C (32 °F to 140 °F)
• Mounting: SLC 500 chassis slot installation

Key Features & Benefits

• High-Density I/O: 16 inputs in single-slot footprint maximize chassis utilization
• Optical Isolation: Enhanced noise immunity protects against electrical interference
• LED Status Indicators: Individual input status LEDs for rapid troubleshooting
• Removable Terminal Block: Simplifies wiring and maintenance procedures
• Wide Voltage Range: Accommodates voltage fluctuations in industrial power systems
• Factory Calibrated: Pre-tested and certified for immediate deployment

Application Scenarios

The 1746-IA16 module excels in diverse industrial control applications:

• Manufacturing Lines: Monitor limit switches, proximity sensors, and safety interlocks
• Material Handling: Track conveyor position sensors and gate status indicators
• Process Control: Interface with level switches, flow indicators, and alarm contacts
• Building Automation: Integrate HVAC status signals and security system inputs
• Packaging Systems: Detect product presence, jam conditions, and cycle completion

Installation & Configuration

The module installs directly into any available SLC 500 chassis slot. Configuration is performed through RSLogix 500 programming software, with automatic I/O addressing based on slot position. The removable screw-terminal block accepts 12-22 AWG wire for field connections.

Quality Assurance

Every 1746-IA16 module undergoes rigorous factory testing including:

• Input voltage threshold verification
• Isolation resistance testing (1500V AC)
• Response time validation
• LED functionality check
• Backplane communication verification

Common Questions

Q: Can this module accept 24V AC signals?
A: No, the 1746-IA16 is rated for 100-120V AC inputs only. For 24V AC applications, consider the 1746-IA8 module.

Q: What’s the maximum wire run distance?
A: Recommended maximum is 300 meters (1000 feet) using shielded cable to maintain signal integrity.

Q: Is this compatible with ControlLogix systems?
A: No, this module is designed exclusively for SLC 500 chassis. ControlLogix systems require 1756-series I/O modules.

Q: Does it support hot-swapping?
A: While physically possible, Allen-Bradley recommends powering down the chassis before module replacement to prevent data corruption.

Q: What diagnostic capabilities are included?
A: The module provides individual input status LEDs and reports faults through the SLC processor’s diagnostic system.

Warranty & Support

This product includes a comprehensive 12-month warranty covering manufacturing defects and component failures. Our technical support team provides installation guidance, troubleshooting assistance, and configuration support throughout the product lifecycle.

Related SLC 500 Components

Package Contents

• 1 — Allen-Bradley 1746-IA16 AC Input Module
• 1 — Removable terminal block
• 1 — Installation documentation
• 1 — Warranty certificate

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