ABB ACS880-207, Hardware Manual

Page: 143 / 148

2) Use of the signal in the control program. When parameter 120.30 External charge enable
has value Yes (default setting), the control program reserves this I/O terminal for external
charging circuit control and monitoring, and parameters 110.24 RO1 source and 110.30
RO3 source are write-protected. If the value is No, you can use the I/O terminal for other
purposes.
3)
Use of the signal in the control program (fixed). See also the delivery-specific circuit
diagrams.
4)
This input only acts as a true Safe torque off input in inverter control units. In other
applications (such as a supply or brake unit), de-energizing the IN1 and/or IN2 terminal will
stop the unit but not constitute a true safety function.
5)
Total load capacity of these outputs is 4.8 W (200 mA at 24 V) minus the power taken by
DIO1 and DIO2.
6)
Determines whether DICOM is separated from DIOGND (ie, common reference for digital
inputs floats).
DICOM=DIOGND ON: DICOM connected to DIOGND. OFF: DICOM and DIOGND separate.
7) 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.
8)
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 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).
Safe torque off (XSTO, XSTO OUT)
Note: The XSTO input only acts as a true Safe torque off input on the inverter control unit.
De-energizing the IN1 and/or IN2 terminals of other units (supply, DC/DC converter, or brake
unit) will stop the unit but not constitute a true safety function.
FSO-xx safety functions module connection (X12)
See the user manual of the FSO-xx module. Note that the FSO-xx safety functions module
is not in use in supply, DC/DC converter or brake units.
SDHC memory card slot
The BCU-x2 has an on-board data logger that collects real-time data from the power modules
to help fault tracing and analysis. The data is stored onto the SDHC memory card inserted
into the SD CARD slot and can be analyzed by ABB service personnel.
The control unit 143