0
Want this question answered?
Be notified when an answer is posted
Add your answer:
Earn +20 pts
How a mimic panel works in fire alarm system?
Mimic panel in fire alarm system 'mimics' or mirrors the signal of the Main Fire Control Panel.
Why to use pnp transistor in fire alarm circuit?
You can use a PNP or an NPN transistor in a fire alarm circuit. Both will work. It all depends on how you want to energize the alarm, and with what polarity of signal.
Can fire alarm sub panel power supply tap from main fire alarm panel?
Yes, as long as there is enough typical/backup/standby power for both.
Is a Simplex 4020 fire alarm panel addressable?
Yes.
How do you turn off a fire sprinkler tamper alarm?
First you locate the source of the alarm, undo the condition (e.g., valve closed, inadequate pressure, etc), then reset the alarm condition on the sprinkler control panel and reset the alarm on the fire alarm control panel (assuming they're connected, as required by many fire codes).
Is it required to have a fire alarm panel?
Only if your building is required to have an interconnected fire alarm system. Your local and state fire codes and building codes will determine what kind of alarm system is required, if any. Many single or two-family dwellings are allowed to have individual smoke alarms that are not connected to an alarm panel, but they only give local audible/visual alarm. An alarm panel allows the system to call automatically for help, when necessary. When you have one connected in a building it will supply power to the smoke detectors and the rest of the fire alarm system and may indicate where the fire has been detected. This information can be relayed to the dispatchers, allowing the fire officer/brigade to find the source of the alarm quickly and attend to the cause.
What is the use of repeater panel in fire alarm control panel?
Repeater panels, also known as Annunciator panels are used to provide a visual display of the main panel. They can additionally provide limited control functions, such as acknowledge, silence, and reseting the main fire alarm panel.
Will manually turning off a shunt trip breaker set off the fire alarm?
Manually turning off a shunt trip breaker should not set off the fire alarm. The only way that the breaker could set off the fire alarm when turned to the off position is if there is an auxiliary contact on the breaker connected to the fire alarm circuit. This is not usually done because the breaker should be able to be turned off when doing maintenance on the breakers circuit. If the breaker is a mandatory feed breaker to a piece of fire alarm equipment and shouldn't be left in the off position it might have a trouble circuit connected to the fire alarm panel. A trouble alarm on a fire alarm panel is different from an alarm circuit alarm.
What type of fire alarm annunciation system identifies the zone in which the alarm was initiated both at the alarm control panel and through the audio notification device?
zoned
Why are use plate Repeater in the fire alarm system and Where to install?
Plate Repeater is used in the fire alarm system so that it shows the same information that the main control panel does. The repeater panel looks a lot like the main control panel and can be placed up to 30 meters from the main control panel.
What is the difference between a repeater panel and a mimic panel in a fire alarm system?
A repeater panel looks nearly or identical to the main panel. You can control the functions of the panel that you can do on the main panel. A mimic panel just simply 'mimics' what happens on the fire alarm system. You can't do any functions like enable/disable or sound/silence alarms etc. It has an in built piezo buzzer when a fire alarm is activated, the mimic panel displays this status and tells you the zone/zone description. It may also tell you any faults that have occured. You can silence the buzzer on this mimic panel.
How is a circuit for a fire alarm marked in the panel?
In the US, NFPA 72 (2007) 4.4.1.4.2.2: "Circuit disconnecting means shall have a red marking, shall be accessible only to authorized personnel, and shall be identified as 'FIRE ALARM CIRCUIT'". Other codes, or earlier versions, may have slightly different requirements, such as marking it "FACP" for "fire alarm control panel."
