Serial Port Expansion

Application Notes

Orion offers two solutions for expansion beyond the standard 17 serial ports: the software option Cascaded Orions and the network protocol option STCP. STCP, or SEL® Protocol over TCP, is designed to work with SEL relays and enables one or more expansion Orions to serve as a “port switch” or “terminal server” to a Master OrionLX. Up to 96 SEL relays can be connected using STCP. Any Orion can be used as the “port switch” Orion, and can be located local or remote to the Master OrionLX.