Moby Shield Concept - Siemens SIMATIC MOBY D System Manual

4.6

MOBY shield concept

In MOBY, the data are transferred between the ASM and SLG at different baudrates over an
RS 422 interface. The distance between the ASM and SLG can be up to 1000 m. In terms of
cabling, MOBY must be handled in the same manner as a data processing system.
Particular attention must be paid to the shield route for all data cables. In the following
drawings, the most important aspects of reliable installation are shown.
Figure 4-33 Basic shield connection
Connection of other modules
To divert fault currents that can occur on the connecting cable on the SLG, the same
procedure must be followed as shown in the figure above.
MOBY D
System Manual, 01/2010, J31069-D0147-A6-7618
Planning the MOBY D system
4.6 MOBY shield concept
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