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Device specifications
I/O modules > Analog I/O modules
Connection of active-type analog sensors (Voltage) with no galvanically isolated power supply
Fig. 67: Connection example
Voltage
Voltage
*) if the sensor can provide this signal range
In order to avoid error messages or long processing times, it is useful to configure unused
analog input channels as "unused".
532
0 ... 10 V
AGND
UP
ZP
CAUTION!
The potential difference between AGND and ZP at the module must not be
greater than 1V, not even in case of long lines (see figure Terminal Assignment).
If AGND does not get connected to ZP, the sensor current flows to ZP via the
AGND line. The measuring signal is distorted, as a very small current flows
through the voltage line. The total current through the PTC should not exceed
50 mA. This measuring method is therefore only suitable for short lines and
small sensor currents. If there are bigger distances, the difference measuring
method should be applied.
0 V...10 V
-10 V...+10 V *)
3ADR010278, 3, en_US
1.0
2.0
I0-
I0+
1.1
2.1
I1-
I1+
PTC
1.8
2.8
UP
UP
1.9
2.9
ZP
ZP
1 channel used
1 channel used
2022/01/31
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