The controller and the power cord are separate on my machine. The plug where the electrical cord fits only has 2 prongs on it. Then the controller plugs into the base. Mine is a cabinet model, however. Your's is a portable.
It's hard to tell if your plug has three prongs. It kind of looks like it, but I can't tell exactly. If so, then you buy the whole electrical set up in one - the plug to the machine, the plug to he wall and then the controller. That's the way some of the older machines were wired.
I photographed the plugs and controller for my 401. This might help you determine what you need.
bkay
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