Abus TERXON M Instructions D'installation page 104

Notes on security system
The diagram below shows the correct usage of soldered
distributors when connecting more than one detector to an
UK
alarm zone:
Connection cable to alarm centre
Anschlusskabel zur Zentrale
As mentioned above, the alarm centre evaluates the alarm
zones via the existing current flow. Most alarm detectors are
normally closed, which means that the detectors interrupt the
alarm zone in the event of an alarm. The detectors are called
NC (normally closed) detectors and are connected as follows
(the CCT jumper must be removed):
NC alarm contact
NC alarm contact
(e.g. contact switch
NC-Alarmkontakt
(z.B. Öffnungsmelder)
Verteiler
Sometimes it is necessary to combine several alarm contacts
in a zone. Connect the contacts serially.
NC alarm contact
NO (normally open) contacts (e.g., for panic buttons) cannot
be connected to this alarm centre.
8