Example; Electrical Isolation; Fig. 6-3 Maximum Input And Common Mode Voltages - ETAS ES930.1 User Manual

ETAS
U
c
U
in+
U
inx
U
in-
U
C Mxy
U
in+
U
iny
U
in-
U
C Myz
U
in+
U
inz
U
in-
U
c
Fig. 6-3
6.4.2

Example

The input voltages U
defined. The maximum permissible common mode voltage U
culated.
U = 10 V
inx
U = 5 V
iny
U = 10 V
inz
U = 15 V
CMxy
max (U
inx
10 V + 5 V + 10 V + 15 V + max (U
max (U
CMyz
6.5

Electrical Isolation

The analog input channels are electrically isolated from each other. Each ana-
log input channel is electrically isolated from the supply voltage and from the
housing of the module.
ES930.1 - User Guide
Analog Input Channels ("AI 1-4"/"AI 5-8" Connections)
C
+
Kanal x
-
C
Galvanische Trennung
C
+
Kanal y
-
C
Galvanische Trennung
C
+
Kanal z
-
C
Gehäusemasse
Maximum input and Common Mode Voltages
, U , U
inx iny inz
+ U + U + U + U
iny inz CMxy
) = 60 V - 40 V = 20 V
and the common mode voltage U
) = 60 V
CMyz
) = 60 V
CMyz
are pre-
CMxy
is to be cal-
CMyz
48