For many technical applications it is necessary to switch time-delayed loads on and off.
Two groups result:
- Compressor air conditioning
- Bus doors
- Time-delayed motors
- Radiator fan
- Rear view mirror heating
- Headlight cleaning
The exit that triggers the load is activated by an entry signal. The entry can be a switch or a button with plus or minus or a distribution voltage itself.
The exit can be either a relay (closing contact or changeover switch) or a power semi-conductor.
12 + 24 volt usage is possible.