Electrical installation
89
External power supply for the JCU Control Unit (XPOW)
External +24 V (minimum 1.6 A) power supply for the control unit can be connected
to terminal 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.
DI6 (XDI:6) as a thermistor input
1…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
cannot be used at one end, leave that end of the shield unconnected.
• The connection of temperature sensors involves parameter adjustment. See the
Firmware Manual of the drive.
• PTC (as well as KTY84) sensors can alternatively be connected to a FEN-xx
encoder interface. See the User’s Manual of the interface for wiring information.
• Pt100 sensors are not to be connected to the thermistor input. Instead, an analog
input and an analog current output (located either on the JCU or on an I/O
extension module) are used as shown below. The analog input must be set to
voltage.
Motor
T
Motor
T
TT
XDI:6
XD24:1
3.3 nF
>
630 VAC
XDI:6
XD24:1
3.3 nF
> 630 VAC
One sensor Three sensors
Motor
T
Motor
T
TT
AI1+
AI1-
3.3 nF
>
630 VAC
AOx (I)
AGND
AOx (I)
AGND
AI1+
AI1-
One Pt100 sensor Three Pt100 sensors
3.3 nF
>
630 VAC
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