Multichannel Systems TC01-TC02 Manual - Manual (Page 26)

Temperature Controller TC01/02 Manual
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4.2 D-Sub9 Pin Assignment
Pins 1 to 4 of the female D-Sub9 input connector should be connected to the temperature sensor,
and pins 7 and 8 to the heating element. The other three pins are not needed for operation.
TC01 / TC02 : D-Sub Pin Assignment
Note: A four-wire circuit is required for use with Pt100 sensors. Each of the two pairs assigned
to pins 1/2 and 3/4 have to be connected together in close proximity to the PT100 sensor for
proper operation. The current flows through the sensor from pin 1 to 4, and the voltage is
measured between pins 2 and 3. The resistance between pin 1 and the sensor is measured as
Resistance 1, and the resistance between pin 4 and the sensor is measured as Resistance 2,
see also chapter Hardware Diagnosis.