The electronic interface contains the Sleipner's patented intelligent power control that provides a minimal delay between drive directions to reduce wear of the mechanical parts while monitoring solenoid functions. In the case of a solenoid lock-in, the thruster will automatically stop without extra user action or controlling the main switch.
The video shows how to replace this unit on standard On/off versions of the Sleipner tunnel thrusters - SE series.
Note that the speed controlled versions (SEP series) of these thrusters does not contain this unit.