1. Main Function o Heating/cooling output, independent timer output, high/low alarm output o Defrost output, precise temperature control, sensor correction, sensor error detection o Data backup, min. on/off maintaining time setup, RS485 communication(MODBUS) o Auto-output operation cycle settable in case of sensor error, transmission output 2. Input & Output o Relay output : 2point (10A) o Temp. sensor input : 1 point (NTC) o 4~20mA Input : 1 point (including power supply) 3. Sensor Spec o DOTECH standard NTC sensor : DPR-TH1, DPR-TH2 o DPR-TH1 : 5k, ±0.3℃ at 25℃ / DPR-TH2 : 10k, ±1.5℃ at 25℃ 4. General Spec o AC100~240V, 50/60Hz, Max. 4VA, screw bolt terminals 5. Models o FX3D – 00 : Basic model o FX3D – A1 : Add on 4~20mA transmission output o FX3D – R4 : Add on RS485 communication (MODBUS)