One Coupler

There is one type of Fiber Optic Coupler module and it accommodates one fiber Optic link. Additional I/O Link Extender cards and associated Fiber Optic Coupler modules can be installed to increase the number of fiber links.

Transmit and receive links

Connection to the fiber optic cable is accomplished by ST-type connectors. Because the links are duplex and a separate fiber is required for transmit and receive, a pair of ST-type connectors is required at each end of the fiber link.