5 24 Oper ating Instr u ctions CM Synchronous Ser v omotors Electrical Inst allation 56 O ptional equipment Connect the supplied optional equipment according to the enclosed wiring diagrams The wiring diagrams can also be found in the section Appendix T e mperature sensor TF The positive temperature coefficient P TC thermistors comply with DIN 44082 Resistance measurement measuring instrument with V 25 V or I 1 mA S tandard measured values 20500 resistance when hot 4000 T e mperature sensor KTY It is absolutely necessary to observe the correct connection of the KTY to ensure a correct evaluation of the temperature sensor A void currents 4 mA in the circuit of the KTY since high selfheating of the temperature sensor can damage its insulation and the motor winding The characteristic curve in the following figure shows the resistance curve with a measuring current of 2 mA Do not apply any voltage 50927AXX 2000 1800 1600 1400 1200 1000 0 200 40 20 0 4 0 6 0 8 0 1 00 120 140 160 180 200 20 400 600 800 R C