Only the centre pin of the lock sits outside the striker plate unit – the
rest of the lock pin mechanism sits inside – Illustrated below:
The above is critical to the locks operation. When the lock receives a
12v charge from the MEL 56, the tension in the spring mechanism
releases and a loud “snap” sound is heard. This releases the centre
pin which mechanically stops the rest of the lock pin mechanism
from moving.
When finalising the fixing of the lock to the gate, ensure the lock is in
a stationary stable solid state - The lock should be either welded or
bolted to the gate appropriately.