Secutron MR-2300 series, User Manual, Page: 16 / 20

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6.0 Glossary
Alarm Condition
Occurs when devices such as detectors, pull stations, or sprinklers are activated. In a single
stage system, this condition will activate all signalling devices throughout the building. In a two
stage system, this condition will activate an alert signal and the General Alarm timer.
Circuits
Refers to an actual electrical interface and can be classified as initiating (detection), indicating
(signal), or relay. The terms “circuit” and “zone” are often used interchangeably in the fire
alarm industry.
Fast Flash Rate
120 flashes per minute is the rate at which an LED will flash to indicate a supervisory alarm.
General Alarm Timer
In a two stage system, the general alarm timer begins timing when the panel is in the alert
stage. When the general alarm timer times out, the system will go into a general alarm, where
all signals in the building will sound.
Indicating Circuit
A circuit in a fire alarm system that is connected to audible or visual signalling devices.
Initiating Circuit
A circuit in a fire alarm system that is connected to detectors, pull stations, or sprinkler flow
switches.
Latching Circuit
A circuit that, when activated, will cause a condition on the panel that cannot be cleared until
the panel is reset.
LED
The light-emitting diodes (LEDs) of the MR-2306 are colored either amber, red, or green.
When lit, LEDs provide information regarding the status of the panel.
Property and Building Safety Condition
Occurs when dampers open or close, when supply and return fans are running, etc.
Non-latching Circuit
A circuit that, when activated, will cause a condition on the panel that will be cleared once the
circuit is deactivated. This term is used to describe supervisory and trouble circuits.
Non-Silenceable Circuit
A signal circuit that cannot be silenced by pressing the Signal Silence button.