CONTREX M-Traverse - Manual (Page 20)

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The Power Voltage switch (SW1) is located on the Power Board (see Figure 2-3). The
default configuration for the Power Voltage switch is 115 VAC.
NOTE: In most cases, the default configuration will be appropriate for your application
and it will not be necessary to re-configure.
To re-configure for 230V, move the switch from the 115V position (left) to the 230V
position (right).
Figure 2-3 Power Board / SW1 Switch
115
115V
230V 115V
(default)