Brainboxes ed series industrial ethernet to io devices brainboxes ed 538 ethernet to dio device 8 non isolated digital input channels and 4 digital type a relay outputs powerful arm 80mhz 32 bit cpu offers robust and intelligent control side devices that provide the interface to systems on the 24v dc factory floor environment commonly referred to as process sidethe device can be controlled over tcpip using the modbus tcp protocol or simple ascii commands it behaves as a web relay