Siemens S5-135U/155U System Manual page 460

Analog Input/Output Modules
Setting the Type of
Measurement with respect to ground/differential measurement
Measurement
The type of measurement (with respect to ground or differential
measurement) is set with switch S9. The switch settings relate to the
locations on the module shown in Figure 9-26:
Measurement with respect to ground
Current/Voltage
If you have preset differential measurement on switch S9, two channel
Measurement for
groups of four channels each are available. You can configure each channel
Individual Channel group separately for current or voltage measurement.
Groups You set this with switches S5, S6, S7 and S8. Switches S5 and S7 allow three
settings (left, midpoint and right); switches S6 and S8 allow two settings (left
and right). The switch settings relate to the locations on the module shown in
Figure 9-26:
Setting the current/voltage measurement for channel group I
Setting the current/voltage measurement for channel group II
9-78
Type of Measurement
Differential measurement
Channel Group I
(Channels 0 to 3)
Current
Voltage
Channel Group II
(Channels 4 to 7)
Current
Voltage
Switch Setting S9
1 9
ON
OFF
1 9
ON
OFF
Switch S5 Switch S6
Switch S7 Switch S8
System Manual
C79000-G8576-C199-06