The IR33Z7HR20 is a panel-mounted PID temperature controller from Carel’s IR33 series, designed for HVAC and refrigeration systems that demand precision and flexibility.

Key Features

• Power Supply: Operates on 115–230 V AC, suitable for a wide range of installations
• Sensor Inputs: Compatible with NTC, PTC, and Pt1000 sensors for accurate temperature monitoring
• Outputs:
  • 4 relay outputs
  • 4 digital outputs
    Ideal for managing multiple stages or devices
• Real-Time Clock (RTC): Supports time-based control and alarm logging, even during power outages
• Auto-Tuning PID: Automatically adjusts control parameters for optimal performance
• Infrared Remote Capability: Allows remote access to main functions and configuration settings
• User Interface: Clear LED display with large buttons for easy setup and operation