Siemens SIPROTEC 4 7XT71 Mode D'emploi page 28

9.2.3 Frequency Setting
The DIP switch S101 on the printed circuit board assembly allows you to adjust the
polarity reversal frequency (frequency of the square-wave generator).
The DIP switch is located as follows on the printed circuit board assembly:
DIP Switch S101
Fig. 9-2
The frequency settings with DIP switch S101 are listed in the following table:
Table 9-1 Switch position of DIP Switch S101
Frequency of polarity reversal
26
Location of DIP switch S101 on the printed circuit board assembly
0.5 Hz
1.0 Hz
1.5 Hz
2.0 Hz
2.5 Hz
3.0 Hz
3.5 Hz
4.0 Hz
Connector X201
(on the printed circuit board)
Switch position
1
OFF OFF
OFF
OFF OFF
OFF
OFF OFF
OFF
OFF OFF
OFF
SIPROTEC 4, Injection Unit 7XT71, Product Information
C53000-B1175-C128-1, Edition 01.2014
2 3
OFF
ON OFF
ON
ON ON
OFF
ON OFF
ON
ON ON
4
OFF
OFF
OFF
OFF
ON
ON
ON
ON