1. Main features:

- Heating/cooling output
- Independent timer output
- High/low limit alarm
- Defrost output
- Sensor calibration
- Sensor error detection
- Automatic output cycle after sensor error
- Minimum on/off duration time

2. Models:

FX3D-00: Basic model
FX3D-R4: Add on RS485 communication (Modbus)
FX3D-A1: Add on 4 to 20mA transmission output
FX3D-A1R4 : Add on 4 to 20mA transmission output and RS485 communication (Modbus)