How to setup duel R7008sb receiver with duel power input, so that both receiver get redundant power? Can I use the S.BUS port for power? Kelly

We're not sure what you mean when you say you want to set up dual receivers for dual power input. Do you mean that you want to attach two battery packs to each receiver? Or are you trying to use two battery packs to simultaneously power two receivers.

The second is really not a good option. You'd be better off powering each receiver with its own battery pack.

I like to two battery packs to simultaneously power two receivers? Kelly

You really don't want to do it that way. For redundancy, you'd use two receiver, each controlling one side of the airplane, and each having its own battery pack. Using two battery packs would be to provide power redundancy to a single receiver. What you're proposing is to connect two battery packs to a single point, and then providing power to two receivers from that point. You do that and you've eliminated the reason for two receivers or two battery packs.

However to do what you want, use a "Y" harness to bring both battery packs to a single source. Make a reverse "Y" harness (one is not manufactured for this) to split the now single battery lead into the two receivers.