Abus AZ4230 Installationsanleitung Seite 8

3. Components and Wiring
1.) Not used
2.) Zone wiring
You can connect a sensor using one of the following
methods. The contacts of the sensors are usually NC
(normally closed); if you want NO (normally open), you
have to invert the corresponding zones.
Important: If the sensor's voltage supply is to flow via the
extension, two extra leads are needed for the connections
to connectors A (+12 V DC) and B (0V).
NC wiring
Also known an CCL wiring
8