Setting The Vac Power Supply Module To The Line Voltage - Siemens S7-400 Installation Manual

Note
You must use shielded cables for the analog modules (see Section 4.5).
4.12 Setting the VAC Power Supply Module to the
Line Voltage
Set the voltage selector with 6ES7 407-0DA00-0AA0 and 6ES7 407-0RA00-0AA0
An S7-400 with VAC power supply can be operated from either a 120 V or 230 V
line voltage.
Check whether the voltage selector switch is set to your line voltage. To set the
VAC power supply module to the correct line voltage, follow the steps outlined
below:
1. Open the cover of the power supply module.
2. Remove the window of the voltage selector switch by levering it off with a
screwdriver.
3. Set the voltage selector switch to your available line voltage.
4. Refit the window.
5. Close the cover.
The following figure shows how to set the voltage selector switch to the available
line voltage.
S7-400 and M7-400 Programmable Controllers Hardware and Installation
A5E00069481-04
Wiring the S7-400
4-19