Siemens SIMATIC S5-95F, Manual

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S5-95F Guidelines for the Planning and Installation of the Product
3.4 Wiring of Programmable Controllers for EMC
The following section describes:
• Routing of cables within and outside cabinets
• Equipotential bonding between devices
• Single and double-ended connection of cable shields
• Checklist for electromagnetically compatible installation
3.4.1 Routing of Cables
This section covers the routing of bus, signal and supply lines. The purpose of cable routing is to
suppress crosstalk between cables laid in parallel.
Routing of Cables Within and Outside Cabinets
For electromagnetically compatible routing of cables and lines, it is advisable to subdivide the lines
for S5-95F and third-party systems into the following line groups and lay the groups separately.
Group A: Shielded bus and data lines (for programmer, OP, SINEC L1, SINEC L2, printer, etc.)
Shielded analog lines
Unshielded lines for DC voltage 60 V
Unshielded lines for AC voltage 25 V
Group B: Unshielded lines for DC voltage >60 V and 400 V
Unshielded lines for AC voltage >25 V and 400 V
Group C: Unshielded lines for DC and AC voltage>400 V
Group D: Lines for SINEC H1
From the combination of individual groups in the following table, you can read off the conditions for
laying the line groups.
Table 3-2 Rules for Laying of Line Combinations
Group A Group B Group C Group D
Group A
Group B
Group C
Group D
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Legend for the table:
Lines can be laid in common bundles or cable ducts.
Lines must be laid in separate bundles or cable ducts (without minimum clearance).
Lines within cabinets must be laid in separate bundles or cable ducts; outside the cabinets but
within buildings, they must be laid over separate cable routes with a clearance of at least 10 cm
(3.93 in.).
Lines must be laid in separate bundles or cable ducts with a clearance of at least 50 cm
(1.64 ft.).
EWA 4NEB 812 6210-02
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