Function of the activation master unit - VdS shunt lock

  1. The activation master pulls the deactivation request line (pin 14) to ground potential after the activation of a transponder authorised for activation.
  2. This causes all deactivation units to start deactivating their locking cylinders.
  3. If the activation master recognises a positive deactivation acknowledgement within ten seconds (deactivation acknowledgement line becomes high-impedance), a potential-free contact between pin 5 and pin 7 is closed. A burglar alarm system connected to this can thus be signaled that it can activate.
  4. The activation master immediately disconnects this potential-free contact between pin 5 and pin 7 after the renewed activation of a transponder authorised for activation. This can be used to signal to a connected burglar alarm system that it should deactivate.
  5. The deactivation request line (pin 14) is then set high impedance again by the activation master.
  6. The burglar alarm system also sets the deactivation request line to high impedance as soon as the alarm system is disarmed.
  7. As soon as the deactivation request line is no longer highly resistive, the deactivation units reactivate their locking cylinders.