GF82.20-P-4102A Door contact switches, location/purpose/design/function 15.12.96

MODEL  202 as of 1.6.97

Location   GF82.20-P-0002-01B
  Purpose The status of the vehicle doors (open, closed) is indicated as an electrical signal by the door contact switches.  
  Design The door contacts are designed as normally closed switches. (Switching contacts are open when doors are closed).  
  Function If the door is open, the door contact switch then connects an input of the pneumatic system equipment (PSE), combined functions (A37) to ground. The PSE transmits the status as a CAN message.