Disassembly - Siemens SIMATIC NET S7-300-PROFIBUS CP 342-5 Equipment Manual

Installation, wiring, commissioning, removal

3.4 Disassembly

3. Connect the CP to the power supply.
Follow the instructions as described in detail in /2/ (Page 54) when wiring between the
power supply and the CPU.
Note
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!
Note
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 /2/ (Page 54)
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".
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 53) and the online help of the configuration tool.
3.4 Disassembly
Improper disassembly
Improper disassembly may result in a risk of explosion in hazardous areas.
For proper disassembly, observe the following:
• Before starting work, ensure that the electricity is switched off.
• Secure remaining connections so that no damage can occur as a result of disassembly if
38
WARNING
the system is accidentally started up.
Equipment Manual, 01/2023, C79000-G8976-C146-11
CP 342-5