Additional information on the connections
￭ External power supply for the control unit (XPOW)
The control unit is powered from a 24 V DC, 2 A supply through terminal block XPOW.
Using an external supply is recommended if
• the control unit needs to be kept operational during input power breaks, for example,
because of continuous fieldbus communication
• immediate restart is needed after a power break (that is, no control unit power-up delay
is allowed).
￭ DI6 as a PTC sensor input
PTC sensors can be connected to this input for motor temperature measurement as follows.
The sensor can alternatively be connected to FEN-xx encoder interface module or FPTC-xx
thermistor protection module (option +L536) or PTC relay (option +L505). At the sensor end
of the cable, leave the shields unconnected or ground them indirectly via a high-frequency
capacitor with a few nanofarads, for example 3.3 nF / 630 V. The shield can also be grounded
directly at both ends if they are in the same ground line with no significant voltage drop
between the end points. See the firmware manual of the inverter unit for parameter settings.
1
...
+24V
DI6
+t°+t°+t°+t°+t°
+t°
One to six PTC thermistors connected in series1
WARNING!
As the inputs pictured above are not insulated according to IEC 60664, the
connection of the motor temperature sensor requires double or reinforced insulation
between motor live parts and the sensor. If the assembly does not fulfill the
requirement, protect the I/O board terminals against contact and do not connected
them to other equipment, or isolate the temperature sensor from the I/O terminals.
Make sure that the voltage does not exceed the maximum allowed voltage over
the PTC sensor.
￭ AI1 or AI2 as a Pt100, Pt1000, PTC or KTY84 sensor input
Sensors for motor temperature measurement can be connected between an analog input
and output, an example connection is shown below. (Alternatively, you can connect the
KTY to an FIO-11 or FAIO-01 analog I/O extension module or FEN-xx encoder interface
module.) At the sensor end of the cable, leave the shields unconnected or ground them
indirectly via a high-frequency capacitor with a few nanofarads, for example 3.3 nF / 630 V.
The shield can also be grounded directly at both ends if they are in the same ground line
with no significant voltage drop between the end points.
146 Control units of the drive
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