To switch the voltage of the RPQ2 is very easy, you have to remove the seven screws on the top to open the unit. On the right-hand side will be the power supply, there is a switch there that is 120/240 you need to put it in the 240V position. You will also need to change the fuse to an 80mA, the unit will be fine with the 160mA that is currently in place but we recommend that it gets changed as soon as possible for safety. The part number for the fuse that we use it 0034.3106. It can be purchased here.
Tricks of the Trade