Simplifying surge and power-fail protection circuits in PLC systems
The Programmable Logic Controller (PLC) system is usually connected to an external DC power supply to provide power to the controller unit, backplane and I/O modules. The input protection circuits are required to protect the PLC from various faults that may occur either on the field or the PLC side.
Traditionally, discrete or semi-integrated circuits have been the solution and require a lot of external components to provide protection and to pass stringent electromagnetic compatibility (EMC) tests. Industry’s first high voltage eFuse, the TPS266x devices from Texas Instruments, integrate all of the necessary functions required to simplify the complete protection needs. This application report describes how the TPS266x devices simplify protection circuits for the EFT, surge and power-fail requirements.
To read more, click here.
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