Eaton XN300 Manual

Also see for XN300: Instruction manual Manual

25 Analog input/output module ±10 V XN-322-4AIO-U225.4 DiagnosticsXN300 slice modules 06/16 MN050002 EN www.eaton.com 18725.3.3 Measurements using sensorsIn order to measure a sensor's output voltage via an analog input, a differen-tial voltage measurement is carried out without connecting either input cableto ground (GND). The signal being measured must fall within the input's per-missible common mode range.Voltage measurement for floating voltage sourcesWhen using a non-floating voltage source (a voltage source with reference toGND), the input must be configured as a differential analog input by means ofsoftware. The corresponding parameter can be configured using object0x51A0. In order to avoid errors in measurement caused by compensatingcurrents, there must not be any connection between analog input AI- andGND when it comes to the analog input.Voltage measurement for non-floating voltage sourcesWhen using a floating voltage source (a voltage source without reference toGND), the input must be configured as a GND ground reference by means ofsoftware or an external reference to GND must be established. The corre-sponding parameter can be configured using object 0x51A0. The GND refer-ence will prevent the measurement signal from moving out of the permissi-ble measurement range.Figure 102: Wiring analog inputs in order to measure one non-floating voltage source (1+/1-)and one floating voltage source (2+/2-)25.4 DiagnosticsCable break diagnostics will only be run for the analog inputs. The R voltagereference outputs will be individually monitored for overcurrent, short-cir-cuits, and an excessively high total current. Object 0x31A3 delivers the diag-nostics – please refer to manual „CANopen Gateway XN312-GW-CAN“,MN050003.1+ 1- 2+ 2- X2 R R R R -1+ - 2+PE24 V0 VPEX1+U-+U-PEPEX3