This signal input interface mainly to be used in small, middle and big size fire fighting project. Feature: ★2-bus, non-polarity. ★Power line is polarized. ★Set with one addressable code, adopts E-code method. ★The double loops single color indicating lamp shows the module action information. ★Which can input the interlock quipment feedback infromation after two actions. ★Which can output double voltage signal and double passive switch signal. ★While the power cut, the module return the malfunction signal.
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