Comtrol VS1100 Configuration Guide - Manual (Page 29)

Power Supply Requirements 29
InterChangeVS Specifications
Power Supply Requirements
All VS1000 units include an auto-switching power supply that
automatically senses the line voltage and cycle rate and sets itself
accordingly. No manual switching is required. However, depending on
the model you purchase you may receive one or more AC power cords,
and it may be necessary to determine and select the appropriate
power cord for use in your area.