beautypg.com

Siemens S5-135U/155U User Manual

Page 460

background image

9-78

System Manual

C79000-G8576-C199-06

Measurement with respect to ground/differential 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:

Type of Measurement

Switch Setting S9

Measurement with respect to ground

ON

OFF

1

9

Differential measurement

1

9

ON

OFF

If you have preset differential measurement on switch S9, two channel
groups of four channels each are available. You can configure each channel
group separately for current or voltage measurement.
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

Channel Group I
(Channels 0 to 3)

Switch S5

Switch S6

Current

Voltage

Setting the current/voltage measurement for channel group II

Channel Group II

(Channels 4 to 7)

Switch S7

Switch S8

Current

Voltage

Setting the Type of
Measurement

Current/Voltage
Measurement for
Individual Channel
Groups

Analog Input/Output Modules