Allen-Bradley | 1762IR4 | MicroLogix 1200 (1762 Series)

Product Description: Allen-Bradley 1762-IR4

The Allen-Bradley 1762-IR4 is a 4-channel analog input module designed for the MicroLogix 1100, 1200, and 1400 controller platforms. It provides precise temperature measurement using resistance temperature detectors (RTDs) or direct resistance input. This module supports multiple RTD types and wiring configurations, making it ideal for industrial temperature monitoring and process control applications requiring accurate thermal input.

Key Features

• 4 individually configurable RTD/resistance input channels
• Supports 2-, 3-, and 4-wire RTD configurations
• Compatible with common RTD types including Pt100, Pt200, Pt500, Pt1000, and Ni100
• High-resolution input conversion with programmable filters
• Channel- by-channel fault detection (open-circuit and out-of-range)
• Removable terminal block for easy field wiring
• Factory-calibrated with no field calibration required

Technical Specifications

• Number of Channels: 4
• Supported RTD Types: Pt100, Pt200, Pt500, Pt1000, Ni100 (IEC 751 standard)
• Input Type: RTD or resistance (Ohmic)
• Resistance Ranges: 0–400 Ω and 0–4000 Ω
• Resolution:
  • 15 bits (RTD mode)
• Accuracy: ±0.5% of full scale (typical)
• Isolation Voltage: 1200V AC (channel-to-backplane)
• Backplane Current Draw:
  • 120 mA @ 5V DC
• Operating Temperature: 0°C to 55°C
• Mounting: DIN rail
• Certifications: UL Listed, CE, CSA, RoHS, Class I Div 2

Application Areas

• Industrial temperature monitoring and control
• Food, beverage, and pharmaceutical manufacturing
• HVAC systems and cleanroom environments
• Resistance-based process measurement
• OEM machinery requiring RTD-based feedback

Advantages

• Multi-type RTD support enables flexible temperature input design
• High resolution ensures accurate thermal readings
• Compact module size preserves control panel space
• Diagnostic features simplify maintenance and troubleshooting
• Seamless integration with MicroLogix controllers for scalable automation