Siemens ET 200M, Manual, Page: 163 / 284

16-Channel, 24 VDC Discrete Input MTA
Marshalled Termination Assemblies for ET200M Remote I/O Modules
A5E00482820-12 163
12.10.2 Inputs
The inputs of the SDI module are capable of wire break detection if a resistor is
wired in parallel with the sensor, the resistor should be located near the sensor.
See Figure 12–4. The Wire Break option must be checked for each channel that
will use this feature.
Also, the
No sensor supply boxes should not be checked because the sensor
does not use the VS from the module as a supply. Not using VS eliminates some of
the diagnostics from operating. See the “IO Module Restrictions” in the Technical
Specifications table.
All other options should be set for the user preferences.
Figure 12–4 shows the SDI with all 16 channels using the wire break option and
the No sensor supply option not selected.
Figure 12–4 16-Channel Discrete Input Hardware Configuration: Inputs