cascade controller, very useful when the heat is not produced where it is used ( for exemple heating of a chemical reactor through a enveloppe)
for sensitive application, there is the possibility to limit the controller output or limit the difference between the internal and external measured values
it can also be used as a conventional PID controller
2 inputs for sensor (Pt100, thermocouple, 0/4-20 mA)
2 relays outputs (max. 230 V, 2 A) or 24 V output in option (internal resistance 1 kohms)
2 relays for alarms
2 analog outputs 0/4-20 mA or digital output (to send the measured value, setpoint, etc… to other devices)
analog or digital input (for external setpoint, external controller starting,…)
