What devices are needed to install an alarm system? Urgent online request
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There are a total of 4 alarm channels, with the locations being between 500 and 1000 meters apart. It is required that the alarms can identify the location where an incident has occurred; there should be no audible or visual alerts at the scene, while the control room must be equipped with audible and visual alerts. Materials need to be submitted now.
It can be done via wired or wireless methods; for the wired approach, wiring is used along with an xxs-type audio-visual alarm, and the location is indicated on the surface. For the wireless method, a wireless data collector is used, along with a receiver in the control room; again, an xxs alarm is used to indicate the location
What alarm? Fire alarm or combustible toxic gas alarm?
The simplest method is to use four light bulbs to represent the four locations, sharing one alarm horn. Four dry contact signals come from four different sources; they are connected in series into the relay coil circuit, while the light bulbs are connected in series into the relay contact circuits. Use the relay auxiliary contact to connect the alarm horn.
1# nmgsbl: First, it is necessary to determine what type of alarm you need – digital or analog, or related to pumps or combustible gas detection – and then decide on the appropriate alarm scheme.
It is a digital alarm: a button is used on-site, while an audio-visual alarm is provided in the control room. Should this device be powered by 24V or 220V? Also, should the signal setting be normally open or normally closed? Which option is safer?
It is better to use normally closed contacts; if a wired connection is used, what will happen if there is a problem with such a long cable and it becomes impossible to send alerts? Safety first! With a circuit using normally closed contacts, false alarms are the most common issue; there are no cases of no alarms at all!
In short, it’s the power supply, relay, flash alarm, and speaker – it depends on what type of signaling point you choose