ABB SPIET800 Ethernet CIU Transfer Module

ABB SPIET800 in the PLC control system, the power supply occupies an extremely important position. Grid interference into the PLC control system mainly through the PLC system power supply (such as CPU power supply, I / O power supply, etc.), transmitter power supply and the PLC system has a direct electrical connection with the instrument power supply coupling into the power supply. Now for the PLC system power supply, generally use the isolation performance of the power supply, and for the transmitter power supply and the PLC system has a direct electrical connection with the instrument power supply, and has not been sufficient attention.

Although a certain degree of isolation measures, but generally not enough, mainly the use of isolation transformer distribution parameters, poor interference suppression ability, coupled by the power supply into the common mode interference, differential mode interference. So for transmitters and common signal instrumentation power supply should be selected distribution capacitance is small, inhibit the band (such as the use of multiple isolation and shielding and leakage inductance technology) of the distributor, in order to reduce the interference of the PLC system.

ABB SPIET800 In order to ensure that the grid feed is not interrupted, online uninterruptible power supply (UPS) power supply can be used to improve the safety and reliability of power supply. And UPS also has a strong interference isolation performance, is an ideal power supply for PLC control system.