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2.0 GENERAL NOTES
Circuits and Zones:
“Circuits”
refers to an actual electrical interface,
Initiating
(Detection),
Indicating
(Signal), or
Relay
.
“Zone”
is a logical concept for a Fire Alarm Protected Area, and will consist of at least one Circuit.
Often the terms Zone and Circuit are used interchangeably, but in this Manual the term Circuit is used.
Wiring Styles:
Initiating Circuits
are configured by default as Class B (Style B). They may be globally (all or none) configured as
Class A (Style D) as described in the Configuration Section. This operation uses odd and even pairs of two-wire Class
B (Style B) circuits to make one four-wire Class A (Style D) circuit, thus cutting in half the number of available Initiating
Circuits.
Notification Circuits
may be individually wired as Class A (Style Z) or Class B (Style Y) without affecting the number
of circuits available (see Module wiring instructions).
Note
: All Class B (Style B) initiating circuits are 2 wire smoke detector compatible. These circuits are current limited
to 100 mA max. Refer to table on page 32 for a list of compatible smoke detectors.
