| 摘要 |
The electronic control unit comprises a timer unit for providing system control signals in response to input data and a driver unit connected, via cables, to devices to be controlled, e.g. irrigation valves in an irrigation system. The timer unit and the driver unit are physically separated by an air gap and communicate only via a wireless link e.g. infrared. The sensitive electronics contained within the timer unit are thus protected against electrical surges occurring in the field wiring or driving part of the system. Surge suppression components are included in the drive unit circuit.
|
