ABB ACS880-307LC, Hardware Manual

Page: 52 / 106

Description Terminal
Memory unit connection X205
1) Must be set to ON when the supply unit is the first or last unit on the drive-to-drive (D2D) link. On intermediate units, set
termination to OFF.
2) Default use of the signal in the control program. The use can be changed by a parameter. See also the delivery-specific
circuit diagrams.
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 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). 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).
The X485 connector
The X485 provides a connection for optional CIO-01 I/O module. The following diagram
shows the wiring for the CIO module.
BCU CIO CIO
X485
B
A
BGND
SHIELD
X485
B
A
GND
SHIELD
X485
B
A
GND
SHIELD
52 The control unit