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2.0 Conventions
2.1 Circuits
Refers to an actual electrical interface for initiating (detection), indicating (signal), and
releasing.
2.2 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.
2.3 Display Points
There is a display point associated with every initiating and indicating circuit of the Secutron’s
MR-2320 LED Series fire panel. For an initiating circuit there are two LEDs for every display
point: one single color (amber) and one dual color (red/amber). For an indicating circuit there
is only one LED: one single color (amber), for every display point.
2.4 Wiring Styles
Initiating and indicating circuits are Class B (Style B and Y). Changing the initiating circuits to
Class A requires an MR-2300-A adder board which will convert SIX initiating zones from Class
B (Style B) circuits to Class A (Style D). This is done without penalizing the number of circuits,
which remains the same as in Class B (Style B). Changing the indicating circuits to Class A
requires an MR-2300-NC2 adder board, which will convert TWO indicating zones from Class
B (Style Y) circuits to Class A (Style Z). Releasing circuits (Z) are Class B (Style B) only.
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