Abstract: A multi input circuit is provided having a first terminal; a second terminal; a third terminal; a current element sensing signal detection unit connected between the first terminal and the third terminal; a multiplexer of which input ports are each connected to the first to third terminals and an output end of the current element sensing signal detection unit; a key input unit selecting the input ports for receiving the sensing signals from the multiplexer; a power supply unit; a switch turning-on/off power supplied to the RTD temperature sensor from the power supply unit; and a control unit outputting a control signal selecting the input ports of the multiplexer and a control signal controlling the turn-on/off of the switch according to the selection of the key input unit to receive the sensing signal input to the input port of the multiplexer.

Abstract: The present invention relates to a dial type temperature controller easily changing a temperature range that is provided with a selector for changing temperature ranges and indication panels for selected corresponding ranges and allows a user to easily change the temperature range without an error, when changing the temperature range and the indication panel, and also stops control output with a dial of the temperature.

Abstract: The present invention relates to a temperature controller having phase control and zero-cross cycle control function that can be achieved at a low cost by controlling power that is supplied to a load, by generating a phase control signal or a zero-cross control signal according to control target temperature of a load, using a microcomputer.

Abstract: A terminal board for attachment to a control device in one of a flush or exposed type configuration. The terminal board including at least one exposed fixing hole defined in an upper portion of the terminal board, and at least one attached plate fixing hole defined in a lower portion of the terminal board, wherein the terminal board may be mounted to the control device in an exposure type attachment configuration in which the exposed fixing hole is exposed relative to the case. Alternatively, the terminal board may be mounted to the control device in an flush type attachment configuration in which the exposed fixing hole is flush with the case of the control device.