The channels have the following designations on the module:
Channel 0:
M0+
M0-
Channel 1:
M1+
M1-
:
:
Channel 15: M15+
M15-
Channels are arranged in groups of four, for which you can set
separate measuring ranges:
Channel group I:
Channels 0 to 3
Channel group II:
Channels 4 to 7
The following figure shows the connection of sensors to the module.
You must observe the following condition:
U
E
+ U
CM
< 12 V
(i.e. the sum of the set voltage range and common-mode voltage must
be less than 12 V;
current measuring ranges correspond to a voltage of 2.5 V).
Analog Input Module
M +
M -
M +
U
ISO
MUX
0 V Bus
+
-
+
-
U
E2
U
CM2
+
-
+
-
U
CM1
M -
0 V
ext
U
E1
U
E1/2 : Input
Voltage
CM1/2 : Common-Mode Voltage
ISO : Potential
Difference
U
U
: Equipotential: this potential is established by the sensor reference potential
(external reference potential)
Figure 9-32
Connecting Sensors to the 466 Analog Input Module (Differential Measurement)
The 466 Analog Input Module
System Manual
9 - 94
C79000-B8576-C109-03
