Lightning And Surge Voltage Protection - Siemens CPU 313C Hardware And Installation Manual

 2XWGRRU FDEOH URXWLQJ
5XOHV IRU (0& FRPSDWLEOH FDEOH URXWLQJ
The same EMC compatibility rules apply both for indoor and outdoor routing of
cables. The following also applies:
• Running cables on metal cable trays.
• Electrical connection of the joints of cable trays/ducts.
• Ground the cable carriers.
• If necessary, provide adequate equipotential bonding between connected
devices.
• Take the necessary (internal and external) lightning protection and grounding
measures in as far as they are applicable to your particular application.
5XOHV IRU OLJKWQLQJ SURWHFWLRQ RXWVLGH EXLOGLQJV
Run your cables either:
• in metal conduits grounded at both ends, or
• in concrete cable ducts with continuous end-to-end armoring.
2YHUYROWDJH SURWHFWLRQ HTXLSPHQW
An individual appraisal of the entire plant is necessary before any lightning
protection measures are taken.
$GGLWLRQDO LQIRUPDWLRQ RQ OLJKWQLQJ SURWHFWLRQ 
can be found in the Lightning and surge voltage protection section.
S7-300 Automation System, Hardware and Installation: CPU 31xC and CPU 31x
A5E00105492-03
$SSHQGL[
12-17