Specifications

Application Notes
Night Bell
There are two different Night Bell connections possible to the Controller.
These are illustrated in figure 24.
From an EKTS
A programmer needs to know what type of Night Bell connection exists
Telephone System
between the telephone system and the Controller. In one case, typically
with an EKTS (Key) telephone system, where Night Bell input is wired to
one of the eight Controller onboard zones (corresponding to the eight
switches on the rear of the controller), then you will need to configure it
as an input zone, just as any other (i.e.,door bell, alarm system, door
ajar). The phone system produces a contact closure.
Required Programming: Type of Zone, step 17, Tone Selection, step
27, and Tone Routing, step 28.
From a PBX or
In the other case, typically with a PBX system that produces a ring
Centrex System
voltage output, the Night Bell connection is not wired to one of the eight
input zones, but to the connector on the rear of the Controller labeled
“N.B.” (pins 5 and 6, nightbell)
Required Programming: Night Bell Enable, step 25, Tone Selection,
step 27, and Tone Routing, step 28.
NIGHT BELL CONNECTION
FROM KEY TELEPHONE SYSTEM
CONTACT
CLOSURE OUTPUT
CONTACT
CLOSURE INPUT
70V AUDIO OUTPUT
MOMENTARY
CONTACT CLOSURE
CONTROLLER
Figure 24. Night Bell Interface
NIGHT BELL (N.B.) CONNECTION
FROM PABX TELEPHONE SYSTEM
57