Wiring The Power Supply Module And The Cpu - Siemens S7-300 Installation Manual

1. Open the front panels of the power supply module and CPU.
2. Remove the strain relief clamp from the power supply module.
3. Strip the power cable to a length of approximately 11 mm and connect it to L1,
N, and to the ground conductor terminal of the power supply module.
4. Screw-tighten the strain relief clamp again.
5. You can now wire your CPU:
With &38  ,)0 , the power supply terminal connection is located on the
–
front panel of the integrated I/O.
Connect the lower terminal M of the power supply module to terminal M of
the CPU and the lower terminal L+ of the power supply module to terminal
L+ of the CPU.
&38  ,)0 '3 '3 '3 Insert the
–
connection comb and screw-tighten it.
6. Close the front panel.
The figure below illustrates the procedures described above.
Figure 7-3 Wiring the power supply module and the CPU
Table 7-5

Cable grip of the power supply

Connection comb (accessory for power supply)
1RWH
The PS 307 power supply module is equipped with two additional DC 24 V
connections (L+ and M) for the supply of I/O modules.
S7-300 Automation System, Hardware and Installation: CPU 312IFM - 318-2 DP
A5E00203919-01
1 1
2
230 V/120 V
Wiring accessories
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7-7