Hi, I have a RadioRa2 setup with a bunch of dimmer light switches, and all is great. I'd like to add a keypad to control the Normal/Away programming modes (and maybe a few other presets). I've been looking at the RRD-W7BRL-WH for example. What sort of electrical requirements are there? I have a spare spot in my 3-gang wall plate but I don't think I have any power that runs there other than the lights & light switches in the adjacent gangs. Any advice would be greatly appreciated - thanks!