234230 V AC230 V AC+ 24 V DC11) Relay outputs; 2) Varistor; 3) RC filter; 4) diodeImplementing a motor temperature sensor connectionWARNING!IEC 60664 requires double or reinforced insulation between live parts and thesurface of accessible parts of electrical equipment which are either non-conductiveor conductive but not connected to the protective earth.To connect a motor temperature sensor and other similar components to the drive, youhave four alternatives:1. If there is double or reinforced insulation between the sensor and the live parts of themotor, you can connect the sensor directly to the inputs of the drive.2. If there is basic insulation between the sensor and the live parts of the motor, you canconnect the sensor to the inputs of the drive if all circuits connected to the drive’s digitaland analog inputs (typically extra-low voltage circuits) are protected against contactand insulated with basic insulation from other low-voltage circuits. The insulation mustbe rated for the same voltage level as the drive main circuit. Note that extra-low voltagecircuits (such as 24 V DC) typically do not meet these requirements.3. You can connect the sensor to an extension module with reinforced insulation (eg,CMOD-02) between the sensor connector and the other connectors of the module. Seethe table below for the sensor insulation requirement. For sensor connection to theextension module, see its manual.4. You can connect a sensor to an external thermistor relay the insulation of which is ratedfor the main circuit voltage of the drive.See sections• AI1 and AI2 as Pt100, Pt1000, Ni1000, KTY83 and KTY84 sensor inputs (X1) (page 123)• CMOD-02 multifunction extension module (external 24 V AC/DC and isolated PTCinterface• CPTC-02 ATEX-certified thermistor module (external 24 V AC/DC and isolated PTCinterface.Guidelines for planning the electrical installation 8511
