Adjusting The Power Supply Module To Mains Voltage - Siemens SIMATIC S7-300 Hardware And Installation Manual

7.3

Adjusting the power supply module to mains voltage

Introduction
You can operate the S7-300 power supply on 120 VAC or on 230 VAC. Factory
setting for PS 307 is always 230 VAC.
Setting the mains voltage selector switch
Check to see whether the selector switch is set to the correct mains voltage.
You can change the selector switch setting as follows:
1. Remove the protective cap with the help of a screwdriver (1).
2. Set the selector switch to your mains voltage (2).
3. Replace the cover.
Figure 7-2 Setting the mains voltage selector switch for the PS 307
S7-300 Programmable Controller Hardware and Installation
A5E00105492-02
1
2
Wiring
7-5