GE GEK-106465A - Manual (Page 9)

OVERVIEW
8 CIO Remote CAN Digital I/O Module GEK-106465A
1.2.4. COMMUNICATIONS ARCHITECTURE
CIO units incorporate a CAN BUS port in two physical media: glass fiber optic and cable. The fiber optic port allows
connection to the master unit for a single CIO unit. For connections including several CIO units, the cable port must
be used. If the master unit is a F650, then communication must always be in fiber optic.