programmable logic controllers and input / output interface modules

摘要

programmable logic controller is disclosed. The programmable logic controller includes at least one micro-electromechanical system (MEMS) switch 36 connected to the I / O module 24. MEMS switch 36 is connected to an external device 54, and transmits and receives a signal to an external device 54. The programmable logic controller may also include a voltage sensor 90 measuring a voltage across the MEMS switch and the MEMS switch. MEMS switch 36 is arranged to transmit or receive logic signals.