Electrical installation 83External power supply for the JCU Control Unit (XPOW)External +24 V (minimum 1.6 A) power supply for the control unit can be connected toterminal block XPOW. Using an external supply is recommended if• the application requires fast start after connecting the drive to the main supply• fieldbus communication is required when the input power supply is disconnected.DI5 (XDI:5) as a thermistor input1…3 PTC sensors can be connected to this input for motor temperature measurement.Notes:• Do not connect both ends of the cable shields directly to ground. If a capacitor cannotbe used at one end, leave that end of the shield unconnected.• The connection of temperature sensors involves parameter adjustment. See theFirmware manual of the drive.• Pt100 sensors are not to be connected to the thermistor input. Instead, an analoginput and an analog current output (located either on the JCU or on an I/O extensionmodule) are used as shown below. The analog input must be set to voltage.MotorTMotorTTTXDI:5XD24:13.3 nF> 630 VACXDI:5XD24:13.3 nF> 630 VACOne sensor Three sensorsMotorTMotorTTTAI1+ (U)AI1- (U)3.3 nF> 630 VACAOx (I)AGNDAOx (I)AGNDAI1+ (U)AI1- (U)One Pt100 sensor Three Pt100 sensors3.3 nF> 630 VAC
