ABB ACS880-17, Руководство по оборудованию

Страница: 128 / 244

128 Control units of the drive
Notes:
The wire size accepted by all screw terminals (for both stranded and solid wire) is
0.5 … 2.5 mm
2
(24…12 AWG). The torque is 0.5 N·m (5 lbf·in).
1)
See section Drive-to-drive link (page 129 ).
2)
See chapter The Safe torque off function (page 223 ).
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 129 ).
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
Ground isolation diagram on page 133 .
DICOM = DIOGND ON: DICOM connected to DIOGND. OFF: DICOM and DIOGND
separate.
8)
Current [0(4)…20 mA, R
in
= 100 ohm] or voltage [0(2)…10 V, R
in
> 200 kohm] input
selected by switch AI1 . Change of setting requires reboot of control unit.
9)
Current [0(4)…20 mA, R
in
= 100 ohm] or voltage [0(2)…10 V, R
in
> 200 kohm] input
selected by switch AI2 . Change of setting requires reboot of control unit.

External power supply for the control unit (XPOW)
The BCU-x2 is powered from a 24 V DC, 2 A supply through terminal block XPOW. A
second supply can be connected to the same terminal block for redundancy.

DI6 as a PTC sensor input
PTC sensors can be connected to this input for motor temperature measurement as
follows. The sum of the sensor resistances must not exceed the threshold resistance of
the digital input at normal motor operating temperature. Do not connect both ends of the
cable shield directly to ground. If a capacitor cannot be used at one end, leave that end of
the shield unconnected. See the firmware manual for parameter settings.
Note : PTC sensors can alternatively be connected to FEN-xx encoder interface module.
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
T
3.3 nF
> 630 V AC
PTC
DI6
+24VD
T T
“0” > 4 kohm
“1” < 1.5 kohm
I
max
= 5 mA