Selection of fire control panel
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I would like to choose a fire control controller with the following specifications: it should accept a 4–20mA signal (corresponding to a pressure source of 0–1 MPa), and then output three passive alarm points (closed contacts, corresponding to pressure levels of 0.1 MPa/0.16 MPa/0.22 MPa). Additionally, it should provide an AO output for driving an inverter-driven motor. What type of digital display or alarm device would be suitable for this purpose?
This post was last edited by 1111111 on 2018-1-7 at 22:31. What’s the matter with your way of speaking? It’s completely chaotic and unreadable. :P. Are you a foreigner? . Hehe, what does \"AO point\" mean? Just state clearly that you are innocent – what signal needs to be sent to the inverter and according to what logic, and that’s it . .
The fire control panel doesn’t seem to have the functions you mentioned; ordinary digital display controllers also cannot provide such functions. Digital display controllers typically have two DO and AO outputs, and there is no problem with those. You can also consult major digital display manufacturers.
Digital meters can fully meet your requirements. The AI is required to have 1 input channel, 4 DO output channels, and 1 AO output channel.
If you use it for firefighting, you need to consider data-logging instruments.
Are there any specific models? Could you give me some information on them?
An AI signal (pressure signal) is received; depending on the external source (pressure) signal, the AI signal varies between 4 and 20 mA. The fire control system outputs three passive node signals based on different alarm levels, and it also outputs an AO signal (a speed setting signal used to control the pump speed via an inverter). Are there any better controllers available? Please recommend a brand and model.