No, no. It is not the PLC which is supplying the high frequency range. The thermistor material itself (barium titanate, no less) is "piezoelectric" so supplying DC current to it produces ultrasound as an intrinsic feature. Get it?
-----Original Message----- From: Terry Blanton > These simple PLCs generally have a maximum speed of 25ms. Any faster process will require PACs. Sonic, yes. Ultra, no. T
