Conrad Electronic 75 10 74, Руководство по эксплуатации

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Connect contact „(-) GND“ to the minus (GND) connection of the
alarm system.
When access control is activated, make sure that
no-one is in any of the locked rooms or buildings,
because all switching functions are disabled for the
period that access control is activated.
Connection example 3
Door lock with a two-door system and two code locks
The two-door system is used for access to rooms where only one
door may be opened at a time (e.g. access to clean rooms). The
doors can be operated from outside by the code lock and from
inside by the contact.
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