BCU-01/11 control units 19
Ground isolation diagram
XPOW
+24VI
1
GND
2
+24VI
3
GND
4
XAI
+VREF
1
-VREF
2
AGND
3
AI1+
4
AI1-
5
AI2+
6
AI2-
7
XAO
AO1
1
AGND
2
AO2
3
AGND
4
XD2D
B
1
A
2
BGND
3
SHIELD
4
XRO1, XRO2,
NC
11
COM
12
NO
13
NC
21
COM
22
NO
23
NC
31
COM
32
NO
33
XD24
+24VD
5
DICOM
6
+24VD
7
DIOGND
8
XDIO
DIO1
1
DIO2
2
DIOGND
3
DIOGND
4
XDI
DI1
1
DI2
2
DI3
3
*
Ground
Common mode voltage
between each AI input
and AGND is +30 V
*
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.
