Siemens EF 837 Series Spécifications télécharger pdf (Page 42)

S800 I/O Configuration - Basic Rules and Examples Section 3 Configuration

42 3BSE056248

Long distance distribution in star as Direct I/O to AC 800M

Calculation of the ModuleBus delay for the configuration in the figure above:

ModuleBus delay = (total delay in optical fiber) + 5 x (opto-to-opto delay in TB820) + 2 x

(delay in TB825) + (opto-to electrical delay in TB820) = (4 x 15 + 3 x 1.5 + 1000) x 0.01 +

5 x 4 + 2 x 2.4 + 6.5 = 42 s.

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Siemens EF 837 Series Spécifications Page 42