ABUS AZ4250 Terxon LX 8-zone Wired Extension with PSU - Manual (Page 8)

8
3. Description of components and programming
1.) Not used
2.) ZONE WIRING
You can connect a detector using one of the following methods. Each
zone can be wired differently. The contacts of the detectors are usually
NC (normally closed); if you want NO (normally open), program zone
with the “Inverted” attribute.
Important: The voltage supply of the detectors is provided by two
additional cores for the connections to the AUX terminals (+12 V DC / 0
V).
NC wiring:
Also known as CCL wiring.