Brainboxes ed series industrial ethernet to io devices brainboxes ed 549 ideal for all kinds of industry standard sensors and transducers the ed 549 has 8 analogue inputs rs485 expansion port it is suitable for high precision measurements of voltages and currents most parameters in the real world are measured using sensors with analogue output sensors and brainboxes ed 549 takes these real world signals and turns them into data on your networkas well as the popular 0 to 10v and 4 to 20m