Rather, make a bigger ME controller by adding more Controller blocks directly adjacent to it. If there are two controllers connected only by cable, both will turn red and disable the whole network.
Algorithm himself made a pretty good video about managing your channels
here. He shows off expanding controllers, using P2P tunnels to compress multiple (up to 32) channels into only one or two in various ways, and breaking the network up into several smaller networks with their own controllers, as well as dense cable.
I, personally, like to use P2P tunnels attached directly to the controller, themselves also attached to the controller via a dense cable.
Protip: Don't attach things other than P2P tunnels, dense cables, or more controller blocks to your controller. You'll want to make use of every one of those 32 channels eventually, and anything else will block out all but eight.