138 The control unit
ZCU-1x ground isolation diagram
■
XPOW
+24VI
1
GND
2
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
XRO1, XRO2, XRO3
NC
11
COM
12
NO
13
NC
21
COM
22
NO
23
NC
31
COM
32
NO
33
XD24
DIIL
1
+24VD
2
DICOM
3
+24VD
4
DIOGND
5
XDIO
DIO1
1
DIO2
2
XDI
DI1
1
DI2
2
DI3
3
DI4
4
DI5
5
DI6
6
XSTO
OUT1
1
GND
2
IN1
3
IN2
4
* Ground selector (J6) settings
All digital inputs share a common ground (DICOM connected to DIOGND). This is the default setting.
Ground of digital inputs DI1...DI5 and DIIL (DICOM) is isolated from DIO signal ground (DIOGND).
Isolation voltage 50 V.
Common mode voltage between
channels ±30 V
*