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Suitable cables for temperatures in excess of 70 °C
If the cable or conduit entry point exceeds 70°C or the branching point of conductors
exceeds 80°C, special precautions must be taken. If the equipment is operated in an air
ambient in excess of 50 °C, only use cables with admitted maximum operating temperature
of at least 80 °C.
Protection against transient voltage surges
Provisions shall be made to prevent the rated voltage from being exceeded by transient
voltage surges of more than 40%. This criterion is fulfilled, if supplies are derived from
SELV (Safety Extra-Low Voltage) only.
3.2
Procedure for installation and commissioning
What to do / steps
1. Install the CP on the S7 standard rail.
2. Establish the connection via the enclosed bus connector to the backplane bus.
CP 342-5 / CP 342-5 FO
Manual, 10/2011, C79000-G8976-C146-09
WARNING
WARNING
Slots 4 to 11 are permitted for the CP in racks 0 to 3 (connected by IM 360/361).
Proceed as described in the sections dealing with installation and wiring, explained in
detail in /2/ (Page 48).
NOTICE
No operation in the expansion rack with connection via an IM 365
The CP cannot be used in an expansion rack that is connected via the IM 365! Reason:
The required communication bus is not connected to the extension rack via the IM 365.
Installation and commissioning
3.2 Procedure for installation and commissioning
17
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