Three-phase four-wire connection method can refer to the attached drawing;It can also be used as single-phase input.For single-phase use,A,B and C phase are connected together and then directly connected to (fire) line,while N line is connected to zero.
1.When wiring,it is strictly required that module input,pressure regulating plate output and sampling must be in the same phase(fire line sampling line,that is, A,B,C phase line in "three-phase four-wire input line",please be sure to be introduced from its corresponding solid state input end),and T1 and T1,G and G of each group and circuit must correspond to each other.
2.G and T1 lines please use double stranded shielding lines.The two ends of the shielding layer are connected to the "T1"end of the pressure regulating plate and DV module respectively.The length of the shielding line is not longer than 3 meters.
3.The main working power supply and communication power supply must be completely isolated from each and conform to the requirements marked on the pressure regulating plate.
4.When the whole machine system is protected by over-temperature power failure,be sure to disconnect the three-phase sampling voltage(that is "three-phase four-wire input line")synchronously to ensure the reliability of the voltage regulation output of the main board on the next power supply.