A communication system comprising a controller system, a master control means and at least one slave control means, the controller system and the master control means being connected via a multipole connection means, the master control means being adapted to receive a multipole signal via the multipole connection means and outputting an addressed signal to the at least one slave control means via an addressable connection means. This application also discloses a method of controlling a plurality of fluid flow control means using an output means comprising an actuation signal arrangement means and an actuation means associated with each fluid flow control means.
