Instructions

Door opener of the type “Fail Secure” (working current
- door opener):
This door opener is commonly used as door opener for
residential front doors.
The lock of the latch in the door opener is only unlocked
when operating current is present; e.g., when the door
opener button in the apartment is pressed. Then the
door is opened and the visitor gets access to the apart-
ment. In the absence of the operating current, the door
is locked.
Important!
The exterior unit works only with a stabilised direct cur-
rent of 12 V/DC. Never connect AC voltage (e.g., a bell
transformer) to the exterior unit; this will destroy the
exterior unit; loss of guarantee/warranty!
The relay contact is potential-free, therefore both, DC
voltage and AC voltage, can be connected here to op-
erate the door opener.
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