RS-150-12 AC Input Switch
You've got the correct answer, a bit of background for those that might like to know how these things typically work: 







simulate this circuit &ndash; Schematic created using CircuitLab

The top schematic has 230VAC RMS 50Hz input, the bottom has 115VAC 60Hz input. The only difference is that the SPST switch is closed in the below schematic to turn the circuit into a voltage doubler. RL represents the load. There would be inrush elimination, a fuse, EMI filtering and other circuitry in a real implementation, the point is that both circuits produce a +320V rail for the switching power supply to use. 

If the switch is closed and 230VAC is applied, it will try to generate +640V and will kill lots of parts.

Startup simulation: