Many people know that Siemens fire alarm hosts have circuit boards, but the specific function of the circuit board is probably not known by many people. We usually purchase fire alarm hosts and other fire-fighting equipment, and we need to pay attention to the timing of the purchase of the fire alarm host. And this number of points is determined by the circuit board.

So the circuit board plays a role in determining the number of fire alarm equipment points in the automatic fire alarm system. Once the circuit board is damaged, the entire fire alarm system cannot be debugged properly. Generally speaking, the dual circuit board of the fire alarm host can be replaced. The number of points for circuit boards from different brands also varies, even for the same brand and different systems, the number of points varies.

Generally, fire alarm controllers with a large number of points require a circuit board, such as Siemens fire alarm controllers, which support 127 points per circuit. If a fire automatic alarm system needs to connect a total of 1000 points, we can calculate 800/127=6.3. Note that decimals here should be rounded, not rounded. Through calculation, we know that we need to purchase 7 circuit points for the fire alarm controller. And each circuit requires a circuit board hardware.

At present, different brands of fire alarm controller circuit boards cannot be used interchangeably. Some brands of fire alarm controller circuit boards are also divided into single circuit boards and double circuit boards. A dual circuit board is a combination of two single circuit boards, where one dual circuit board is equal to two single circuit boards. For example, if I have a system with 7 circuits, I can use 3 dual circuit boards and 1 single circuit board.

The circuit board for fire alarm controllers is not necessary for every fire alarm controller, as some small point controllers do not require a circuit board. I hope the above information is helpful for readers when purchasing fire alarm controllers.