Bcu-X2 Ground Isolation Diagram - ABB ACS880-207LC Hardware Manual

￭

BCU-x2 ground isolation diagram

Ground isolation diagram
XPOW
+24VI
GND
+24VI
GND
+VREF
-VREF
AGND
AI1+
AI1-
AI2+
AI2-
AO1
AGND
AO2
AGND
XD2D
B
A
BGND
SHIELD
XRO1, XRO2, XRO3
NC
COM
NO
NC
COM
NO
NC
COM
NO
+24VD
DICOM
+24VD
DIOGND
DIO1
DIO2
DIOGND
DIOGND
DI1
DI2
DI3
DI4
DI5
DI6
DIIL
XSTO
OUT
SGND
IN1
IN2
XSTO OUT
IN1
SGND
IN2
SGND
*Ground selector (DICOM=DIOGND) settings
DICOM=DIOGND: ON
All digital inputs share a common ground (DICOM connected to DIOGND). This is the default setting.
DICOM=DIOGND: OFF
Ground of digital inputs DI1...DI5 and DIIL (DICOM) is isolated from DIO signal ground (DIOGND). Isolation
voltage 50 V.
1
2
3
4
XAI
1
2
3
4
Common mode voltage
5
6 between each AI input and
7
AGND is +30 V
XAO
1
2
3
4
1
2
3
4
11
12
13
21
22
23
31
32
33
XD24
5
6
7
8
XDIO
1
2
3
4
XDI
*
1
2
3
4
5
6
7
1
2
3
4
5
6
7
8
Control units of the drive 61
Control units of the drive 137
Ground