Installation Guidelines S5-95U, SINEC L2
2.4 Routing Cables
Routing the Bus Cable
When routing the bus cable indoors, observe the limiting conditions listed in Table 2-1 (d
O
= outer
diameter).
Table 2-1. Limiting Conditions for Routing Cables Indoors
Feature Limiting Condition
Bending radius when bending once 80 mm (3.1 in.) (10
.
d
O
)
Bending radius when bending more than once 160 mm (6.3 in.) (20
.
d
O
)
Permissible temperature range for routing
cables
- 5 °C to+50 °C (+23 °F to+122 °F)
Temperature range for storing and operating - 30 °C to+65 °C (-22 °F to+149 °F)
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Do not twist, stretch, or crush cables when routing them.
When routing the bus cable outdoors, observe the general regulations regarding lightning and
grounding.
Lightning protection
If cables for SIMATIC S5 devices are to be laid outdoors, both indoor and outdoor lightning
protection should be provided.
Outside buildings, cables should be laid
• in steel conduits grounded at both ends or
• in concrete cable ducts with continuous armouring.
Install these elements where the cable enters the building.
Note
Look at each system individually to determine the measures necessary to protect it
against lightning. Please address your questions to your local Siemens representative.
2-8
EWA 4NEB 812 6112-02
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