ABB AccessControl System Manual page 63

Information about planning and application
Switching process of the reading head
A B
Fig. 49: Switching process of the reading head
In a locked state of the door the reading head can be freely turned in front of the cylinder (A).
Operation of the cylindrical lock is not possible. It is only when a person with access rights holds
his transponder key in front of the reading head that the reading head switches and establishes
a mechanical connection to the cylindrical lock for a few seconds. The lock can then be opened
(B). After the preset time has expired, the reading head automatically switches back into the
locked state of the door.
System Manual 2CKA001473B5074 │63