Disassembly - Siemens SIMATIC NET S7-300 - PROFIBUS Equipment Manual

Installation, connection, commissioning, removal

4.4 Disassembly

Step
3. Connect the CP to the power supply.
Note
Connecting the CP to the power supply
• The CPU, CP and IM (if one exists) must be connected to the same power supply.
• Only wire up the S7-300 / C7-300 with the power switched off!
• 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 (see also /1/ (Page 35) on the topic "Installing the S7-300
with grounded reference potential" and "Installing the S7-300 with ungrounded reference
potential").
Step
4. Connect the CP to PROFIBUS.
5. The remaining steps in commissioning involve
loading the configuration data.
4.4 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
22
WARNING
the system is accidentally started up.
Procedure / significance
Follow the steps as described in detail in /1/ (Page 35) when wiring
between the power supply and the CPU.
Procedure / significance
For more details, in particular on node initialization, refer to /2/
(Page 35).
Equipment Manual, 05/2023, C79000-G8976-C160-04
CP 343-5