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    The safety light curtain is divided into several types with three lines of illuminators. The wiring method of the four lines of the receiver is as follows:
    First, the link cable of the safety light curtain is respectively linked with the illuminator and the light receiver through the aviation plug (Note: the connection cable of the illuminator is three-wire system---brown line, blue line, black line: the link cable of the receiver is Five-wire system --- brown line, blue line, black line, white line)
    Second, the brown line connecting the illuminator and the receiver cable is respectively connected to the positive pole of the device - the blue line is connected to the negative pole - the black line is connected, the white line is the output line, and the input end of the device is connected. If the load is a relay, the white line is Connect one input terminal of the relay (if the relay has polarity requirement = black line or white line is connected to the negative pole of the relay when NPN is output, PNP output: black line or white line is connected to the positive pole of the relay, and the other input end of the relay is connected to the power supply Positive or negative)
    Third, the safety light curtain has NPN dual output or PNP dual output. You can use either one of the two outputs or two independent settings as needed. No matter which one of the outputs is used, the other cable can be used. The wire is insulated.
    Fourth, safety light curtain NPN / PNP simultaneous output mode of the safety light curtain, NPN is black line - PNP for white line only need to choose one output mode according to their actual needs, another output cable Reduce or do insulation treatment.
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