What's the difference between a fire hydrant and a hand line, 4 or 6?
Fire hydrant buttons usually have 6: the button itself, a set of signal lines + a set of direct pump line, and a group of alarm line (slightly higher than the fire hydrant button place, there will be an alarm bell)The reason why the old saying "general" is because there are a few design telephone jack with the hydrant button in one piece, and the alarm bell does not go with the fire hydrant button. Of course, a very small number of cases.
The manual alarm button is usually connected with the fire telephone jack, so it is usually four lines. The two line of the hand itself is the signal line, which is connected to the smoke sensation. The other group is the telephone line.
To distinguish between hand and fire hydrant buttons, they are not the same thing. At the hand with address encoding, the signal line and the smoke is a fire hydrant button loop; some with the address code, some are not the signal line without the address code button can not be directly connected together and the signal line of smoke, after conversion to input module.There is also a situation: some smoke temperature (mainly garage), and no address code. In the same way, it needs to be transformed.
