A system can include a non-light-emitting, variable transmission device a controller coupled and configured to provide power to the first non-light-emitting, variable transmission device; and a router configured to provide power and control signals to the first controller. In an aspect, the controller includes a first connector; the router includes a second connector; and a cable including a third connector and a fourth connector at different ends of the cable. The first and third connectors are coupled to each other, and the second and fourth connectors are coupled to each other. In another aspect, the system can include other non-light-emitting, variable transmission devices and controllers. The system can be configured to perform a method of controlling the system that includes determining power requirements for the controllers and allocating power to the controllers corresponding to the power requirements.