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Hardware Configuration and Assembly
Rule 3: Fixed cable shielding
Ensure that the cable shielding is connected properly.
Use shielded data lines only. The shielding must be connected to ground using a
large surface area at both ends of the data lines.
The shielding of measurement lines must also be connected to ground at both
ends.
The shielding should continue right up to the connection area. Unshielded cable
ends should be kept as short as possible. Connect the cable shielding directly next
to the SIMATIC on the shielding connection clamp. The connection between the
shielding rail and the cabinet/housing must be low impedance.
Use metallic or metal-plated connector housings for the shielded data lines.
Rule 4: Special EMC measures
All inductivity that is to be controlled should be connected with suppressors.
Use interference suppressed fluorescent lighting or incandescent lamps for
illuminating cabinets or housings in the immediate vicinity of your controller.
Rule 5: Uniform reference potential
Create a uniform reference potential and ground all electrical operational elements.
Run sufficiently dimensioned potential equalizing cabling if potential differences
exist or are to be expected in the system. The respective potential compensation is
mandatory for Ex applications.
4.3 Assembly
When assembling the SIMATIC components and the SIWAREX MS, the
installation, assembly and wiring guidelines for the SIMATIC S7-200 must be
followed (see S7-200 manual).
This manual describes supplementary aspects of assembly and wiring that are
specific to the SIWAREX MS.
SIWAREX MS 4-11
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