MTL1171 Series Thermocouple Input Converter. MTL1171 1 channel thermocouple input converter with 4 to 20 mA and 1 to 5 V outputs. The signal conditioner is DIN Rail mountable and its input ranges are switch selectable. Features and Benefits. 1 Channel for type J and K thermocouple sensors Power is supplied via the power bus embedded in the DIN Rail 15 Switch selectable input ranges DIN Rail mounting