EZMarquees can be networked using ASCII (RS422), Ethernet, DeviceNet, or Profibus Communication protocols. There are two standard ports on every EZMarquee RS232 and RS422. Models with Ethernet, DeviceNet, and Profibus communication enabled EZMarquees also have 232/422 ports available as well. There are dip switches on the back panel which can be used to set the group number and unit number of every EZMarquee for networking. You are allowed to have 2 groups of 8 marquees each.