Examlex
Which of the following statements is TRUE?
PLC Input
An input signal or data received by a Programmable Logic Controller, used to control or monitor machine operations.
Resistance Temperature Detectors
Sensors that measure temperature by correlating the resistance of the RTD element with temperature.
Thermocouples
Sensing devices used to measure temperature, consisting of two dissimilar metal wires joined at one end, producing a voltage proportional to temperature difference.
Reed Relay
A type of relay that uses a pair of magnetic reeds as the switching mechanism, often enclosed in a glass tube to protect against external magnetic fields and contaminants.
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