22 Blocking Lock Operation
Blocking Lock operation and the Authorized Setting operation of a Blocking Lock is supported by the SPC
intrusion panel.
22.1 Blocking Lock
A Blocking Lock is a mechanical lock which is mounted into a door in addition to the normal lock and is
used to set and unset the intrusion system. SPC support normal Blocking Lock devices (Blockschloss 1)
and also the Bosch Blockschloss, Sigmalock Plus, E4.03 device (Blockschloss 2).
Depending on the kind of Blocking Lock, a signal is needed to enable locking and unlocking the lock, that
is, the Blocking Lock can only be locked and the system set if the signal Ready to Set is available from the
control panel. This is controlled by a magnetic switch.
The operation of a Blocking Lock is as follows:
1. If there is no open zone, pending alarm or pending fault in the area, the area is ready to set and the
Ready to Set signal is sent from the panel.
2. If the Blocking Lock device is then locked, the Blockschloss 1/2 output is activated.
3. Following the corresponding change on the Keyarm input type, the respective area is set.
4. The Setting Ack output is activated for 3 seconds to signal a successful setting of the area.
Blockschloss 1 output is deactivated when the system is set. Blockschloss 2 stays activated when
the system is set.
5. If the Blocking Lock is unlocked, the Keyarm input is switched to the unset state (closed).
6. Following the change on the Keyarm input type, the area is unset. Blockschloss 1 is deactivated if
the area is ready to set while Blockschloss 2 is activated if the area is ready to set.
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