A communication system is provided that includes a controller system (1),
a master control (2) and at least one slave control (3). The controller
system and the master control (2) are connected via a multipole
connection (4). The master control (2) is adapted to receive a multipole
signal via the multipole connection (4) and output an addressed signal to
at least one slave control (3) via an addressable connection (7, 17).
This application also discloses a method of controlling a plurality of
fluid flow controls using an output (40) comprising an actuation signal
arrangement (41, 41') and an actuator (42, 42') associated with each
fluid flow control.