Siemens SIPART DR22 Manual page 70

1 Technical Description Manual
1.5 Functional description of the structure switches
1.5.4 Controller types (S1, S49 to S53)
see fig. 1-50, page 90
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see fig. 1-5, page24
Figure 1-36 Block diagram S1 = 4 commanded ratio controller
SIPART DR22 6DR2210
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C79000-G7476-C154-03