344 Control units of the drive
External power supply for the control unit (XPOW)
The BCU must be powered from a 24 V DC, 2 A power supply. The power supply is
connected to terminal block XPOW. A second supply can be connected to the same
terminal block for redundancy.
DI6 as a PTC sensor input
A PTC sensor can be connected to this input for motor temperature measurement as
follows. The sensor can alternatively be connected to 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, eg, 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 for parameter settings.
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, the I/O board terminals must be protected against contact
and must not be connected to other equipment or the temperature sensor must be isolated
from the I/O terminals.
AI1 or AI2 as a Pt100, Pt1000, PTC or KTY84 sensor input
Three Pt100/Pt1000/PTC sensors or one KTY84 sensor for motor temperature
measurement can be connected between an analog input and output as 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, eg, 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.
1) For AI1, set input type to voltage with switch AI1 (BCU). For AI2, set input type with AI2 (BCU). Set the
appropriate analog input unit to V (volt) in parameter group 12 Standard AI.
2) Select the excitation mode in parameter group 13 Standard AO.
1…3 × Pt100/Pt1000/PTC or 1 × KTY84
XAI
XAO
AIn+
AIn-
AOn
AGND
1)
2)
T
TT
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