For a large number of Ergs and the computer can needs to be more than 15' from the computer, Concept2 recommends using several groups of monitors.
1. Connect up each group of Erg's PM5's together as shown using Ethernet cables.
2. Use a long ethernet cable from a group to a spare "Primary" monitor near the computer. Repeat with other groups.
3. Connect each of these "Primary" monitors to the computer using a USB cable.
4. When there are more than 20 monitors in a group, Connect "Terminators" to unused connectors on PM5's.