The Temp K2 is a transmitter for 2 Pt100. Which are both Pt100 two-wire turned on in series and operated with 2.5 mA constant current.
Is used only a Pt100, so it is connected as a three wire (± mA and 1 measuring input). Then, the output T1 or T2 is active according to the port.
The device is powered by a DC voltage. The virtual zero point (reference voltage for measurement) and the internal power supply are produced with a Zener and a longitudinal control.
Ue 24VDC (20–30V) ca. 50mA
T1 or T2 0°C = 1V; 120°C = 10V max. 2mA
°C = (V–1) / 0,075
22,5 × 75,5 × 69mm for DIN-rail mounting