U1IT00UC00250 - Carel Universal Controller For ITALY Market, DIN With HMI, NFC, BLE

The U1IT00UC00250 is a configurable universal controller from Carel designed for regulating temperature, pressure and humidity across a wide range of HVAC, refrigeration and heating applications. It mounts on a standard DIN rail and includes an integrated 2-row LED display with Bluetooth Low Energy (BLE) connectivity for wireless commissioning via the Carel Applica mobile app, available on Android (Google Play) and iOS (App Store).

The controller supports ON/OFF, proportional and PID regulation modes across up to three independent control loops. Primary regulation (Probe 1) handles the main HVAC or refrigeration process; a second probe enables differential regulation, dual independent circuits or automatic summer/winter changeover; a third probe delivers setpoint compensation (summer, winter or combined). This flexibility makes the U1IT00UC00250 suitable for applications including AHU coil control, FCU regulation, chiller and heat pump systems, three-point floating valve control, and general building services temperature/pressure management.

Typical Applications

• Air Handling Unit (AHU) cooling and heating coil control
• Fan Coil Unit (FCU) regulation, heating and cooling
• Chiller and heat pump plant control
• Three-point floating valve actuator control (Mode 10)
• General HVAC temperature, pressure and humidity regulation
• Dual-circuit independent control (Probe 1 + Probe 2)

Key Features

• DIN rail mounting polycarbonate housing, IP00 protection rating
• Integrated 2-row 7-segment LED display with buzzer and 14 status icons
• Bluetooth Low Energy (BLE) wireless configuration via Carel Applica app (up to 10 m range)
• RS485 Modbus RTU serial port (BMS) address 1–247, up to 375,000 bit/s, for BMS/SCADA integration
• Second RS485 FieldBus port for peripheral connectivity
• Operating modes: Direct, Reverse, Neutral Zone, 3-point valve, dual setpoint and digital input switching
• Built-in real-time clock (RTC) with 72-hour power-fail backup; time scheduling with 3 daily programmes and 4 time bands per programme (Comfort, Economy, Off)
• Alarm log storing up to 20 events with timestamp; automatic and manual alarm reset modes
• Output rotation function for balanced runtime across digital outputs
• Soft-start function for controlled startup on sensitive plant
• 24 V AC/DC SELV/PELV power supply, 15 VA
• Operating temperature: −20 to +60 °C
• Configurable via Applica Mobile (BLE) or Applica Desktop

Inputs & Outputs

• Analogue inputs: 1× NTC/PT1000/0–10 V/0–5 V ratiometric/0–20 mA/4–20 mA (Probe 1); 2× NTC/0–5 V ratiometric/0–20 mA/4–20 mA (Probes 2 & 3)
• Digital inputs: 2× volt-free contact
• Analogue outputs: 2× 0–10 V DC (10 mA max)
• Digital outputs (relay): 5× 5 A; sum of NO1–NO4 not to exceed 8 A

BMS & Supervisory Integration

The U1IT00UC00250 connects to BMS platforms via the J4 BMS port using Modbus RTU over RS485. Default communication parameters are address 1, 19200 baud, 8-NONE-2. On/Off control via BMS supervisory is supported. The unit is compatible with other Carel universal and temperature controllers stocked by iACS.