Eaton XN300 - 29.4 Diagnostics

29 Analog input/output module ±10 V XN-322-4AIO-U2
29.4 Diagnostics
217 XN300 slice modules 02/24 MN050002EN Eaton.com
29.3.3 Measurements using sensors
In order to measure a sensor's output voltage via an analog input, a
differential voltage measurement is carried out without connecting either
input cable to ground (GND). The signal being measured must fall within the
input's permissible common mode range.
Voltage measurement for floating voltage sources
When using a non-floating voltage source (a voltage source with reference to
GND), the input must be configured as a differential analog input by means of
software. The corresponding parameter can be configured using object
0x51A0. In order to avoid errors in measurement caused by compensating
currents, there must not be any connection between analog input AI and
GND when it comes to the analog input.
Voltage measurement for non-floating voltage sources
When using a floating voltage source (a voltage source without reference to
GND), the input must be configured as a GND ground reference by means of
software or an external reference to GND must be established.
The corresponding parameter can be configured using object 0x51A0. The
GND reference will prevent the measurement signal from moving out of the
permissible measurement range.
Figure 120: Wiring analog inputs in order to measure one non-floating voltage source (1+/1-)
and one floating voltage source (2+/2-)
29.4 Diagnostics
Cable break diagnostics will only be run for the analog inputs. The R voltage
reference outputs will be individually monitored for overcurrent,
short-circuits, and an excessively high total current. Object 0x31A3 delivers
the diagnostics – please refer to manual:
"CANopen Gateway XN-312-GW-CAN", MN050003EN

1+ 1- 2+ 2-
X2
RRRR -1+ - 2+
PE
24 V
0 V
PE
X1
+
U
-
+
U
-
PE
PE
X3