Fans that are not compatible with the TDS13522 (2 wire fans), can be controlled using individual relays (MICROS+, TDS13510, ...). There are two fan types available:
- 4-wire single phase AC motor
- relays are switched in an OR configuration. For Low speed the relay for Low is on and the others are off. Etc. At all times, maximum one relay is switched on by the fan function.
- universal fan control
- relays are switched in an AND configuration. For Low speed, only the relay for Low will be on. For Med, the Low and Medium are on, etc.
The operation is identical to the operation of the fan.