Additional Information On The Connections; External Power Supply For The Control Unit (Xpow); Di6 As A Ptc Sensor Input - ABB ACS880-107 Series Hardware Manual

Notes:
1)
See section The XD2D connector (page
2)
See chapter The Safe torque off function (page
3)
0 = Acceleration/deceleration ramps defined by parameters 23.12/23.13 in use. 1 =
Acceleration/deceleration ramps defined by parameters 23.14/23.15 in use.
4)
Constant speed 1 is defined by parameter 22.26.
5)
See section DIIL input (page
6)
Total load capacity of these outputs is 4.8 W (200 mA at 24 V) minus the power taken by
DIO1 and DIO2.
7)
Determines whether DICOM is separated from DIOGND (ie. common reference for digital
inputs floats; in practice, selects whether the digital inputs are used in current sinking or
sourcing mode). See also
DICOM=DIOGND ON: DICOM connected to DIOGND. OFF: DICOM and DIOGND separate.
8)
Current [0(4)...20 mA, R
selected by switch AI1. Change of setting requires reboot of control unit.
9)
Current [0(4)...20 mA, R
selected by switch AI2. Change of setting requires reboot of control unit.

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. With
a type BCU control unit, a second supply can be connected to the same terminal block for
redundancy.
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. 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.
+t°
+t°
1 One to six PTC thermistors connected in series
50).
BCU-x2 ground isolation diagram (page
= 100 ohm] or voltage [0(2)...10 V, R
in
= 100 ohm] or voltage [0(2)...10 V, R
in
+t° +t°
51).
183).
1
+t° +t°
Control units of the drive 49
55).
> 200 kohm] input
in
> 200 kohm] input
in
+24V
...
DI6