What signal is input to the temperature circuit of the PLC test circuit (voltage or something else)?
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This post was last edited by Qingse Nianhua on 2018-9-30 08:11. 1. What signal is used as input for the temperature circuit in a PLC testing setup (voltage or something else)? 2. For the calibration of the analog circuit using a three-wire thermistor, how should the wires be connected to supply the analog signal (at the thermocouple)?
Damn it, I’m not here to buy ice pops – why do I still have to pay you 5 points in wealth? :lol
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Look at what you’re asking about – what, what, and what? The common types of signals are voltage and resistance signals. A voltage signal is a two-wire signal; generally, a signal generator provides signals in the millivolt range. Resistance signals can be two-wire, three-wire, or four-wire systems. Resistance values can usually be determined using a resistance box. For systems with more than two wires, make sure to connect all the necessary wires; otherwise, errors will occur. What does it mean to convert a resistance signal into a voltage signal?
Temperature MV signal or resistance signal