Optional bolt contact evaluation (global activation suppression) - VdS shunt lock

The bolt contact evaluation prevents the alarm system from being activated if not all doors in the security area are locked.

Use a potential-free normally closed contact as a bolt contact.

To do this, connect the bolt contact to the bolt switch contacts (pin 12 and pin 15, see Connections of deactivation unit). If you do not use a bolt contact evaluation (not VdS-compliant), pins 12 and 15 remain unconnected.

In normal case (idle state), the bolt contact is closed and pulls pin 12 to ground. This means that the deactivation unit cannot deactivate the locking device. Only when the bolt contact opens can the locking device be deactivated and then the deactivation acknowledgement line becomes highly resistive.

A deactivation unit can evaluate several bolt contacts. Connect the bolt contacts in parallel. Only when all bolts are closed and thus all bolt contacts are open, then pin 12 is no longer pulled to ground. Then the deactivation unit can deactivate the locking device and then set the deactivation acknowledgement line to high impedance. The activation is no longer suppressed.

Alternatively, you can also connect the bolt contacts directly to the burglar alarm system.