Siemens SIMATIC NET CP 342-5 Manual page 18

Installation and commissioning
3.2 Procedure for installation and commissioning
3. Connect the CP to the power supply.
4. Connect the CP to PROFIBUS.
The remaining steps in commissioning involve downloading the configuration data.
For more information on configuration and in particular on node initialization, refer to the
manual /1/ (Page 47) and the online help of the configuration tool.
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Follow the instructions as described in detail in /2/ (Page 48) when wiring between the
power supply and the CPU.
NOTICE
Connecting to the power supply
 Connect the CPU, CP and IM (if used) to the same power supply.
 Only wire up the S7300 / C7300 with the power switched off!
NOTICE
Guidelines for grounding and chassis grounding concept
When it ships, the CP has a jumper inserted between the M and functional earth
terminals. If you want to ground the reference potential, do not remove the jumper
between the M and functional earth terminals.
Note the information in the SIMATIC S7 installation guidelines for grounding and chassis
grounding, see Auto-Hotspot
In this document, you will find information on the topic "Setting up an S7-300 with
Earthed Reference Potential" and "Setting up an S7-300 with Unearthed Reference
Potential".
CP 342-5 / CP 342-5 FO
Manual, 10/2011, C79000-G8976-C146-09