Unit installation

VdS Shunt lock function 3066
Page 17
DA MA SA
Deactivation request Solder pin 13 Solder pin 14 -
Deactivation acknowledgement Solder pin 14 Solder pin 13 Solder pin 13
Activation request - Solder pin 12 Solder pin 14
Activation suppression Solder pin 12 - Solder pin 12
Supply voltage positive Solder pin 1 Solder pin 1 Solder pin 1
Supply voltage ground Solder pin 2 Solder pin 2 Solder pin 2
DA = Deactivation unit
MA = Master activation unit
SA = Slave activation unit
2.6 Functional Principles
1. A DA deactivates a neighboring cylinder if the deactivation request line (pin
13) is drawn to ground potential by the MA
or the BAC.
2. A DA reactivates a neighboring cylinder as soon as the deactivation request
line (pin 13) is high-impedance, which means that the MA output (pin 14) and
the corresponding BAC output must
both be high-impedance.
3. A DA draws the deactivation acknowledgement line (pin 14) to ground as long
as its neighboring cylinder is activated or as long as the lock monitoring input
(pin 12) is connected to ground. Therefore, a lock contact must be an electric
strike between ground and pin 12 that opens when the bolt is pushed forward.
4. Consequently, the deactivation acknowledgement line does not go to high-
impedance until each deactivation unit has successfully deactivated its
neighboring cylinder and, if there is lock contact evaluation, all bolts have
been pushed forward.
5. An MA draws the deactivation request line (pin 14) to ground potential after
someone authorized to activate the system operates the transponder.
This causes each DA to start to deactivate its cylinder.
If the MA receives a positive deactivation acknowledgement within no more
than 10 sec. (deactivation acknowledgement line goes high-impedance), a
floating contact is closed between pin 5 and pin 7. This requests the BAC to
activate the system.
6. When someone authorized to activate the system operates the transponder
again, the floating contact between pins 5 and 7 is separated immediately, so
that the BAC is requested to deactivate.
Then the deactivation request line (pin 14) is set to high-impedance. The DAs
then start to reactivate unless the BAC continues to draw the deactivation
request line to ground potential in order to prevent the cylinders from
reactivating (for example, until the system deactivation is complete).