The universal temperature controller MIR-401 | 411 | 421 are suitable for precise ans reasonably priced control applications in all fields of industry. It can be selected between simple ON/OFF control, PID control and motor step control. The actual value signal is connected at a universal input. A second analogue input can be used for heating current measurement or as external set point input. Each MIR-401 | 411 | 421 has 3 process outputs: either only relays or 2 relays plus a universal output, that can be configurated for control of solid state relays, as steady output with current or voltage or as sensor supply.