Power Supply Of The SIM During Operation

The SIM is supplied with voltage KL terminals 30 and ground from KL31. If the vehicle voltage is sufficient then a switching controller (8)  is supplied first, which supplies voltage to the intelligent Star Coupler (4)  and the power supply (5)  .

The second switching controller (7)  is supplied by KL 30 during operation and is controlled by the microprocessor via the cable SHDN 2. The capacitor is charged as of KL R.

The charging of the capacitor forms the emergency energy reserve. The capacitor voltage is 400 V.