We found that many substation are still using RS-422/485 as the main bus for long distance communication. One of the reasons is the protocol is simple and stable.
In a substation, there are many meters to record voltage, current, or harmonic, etc.
Most of the meters are using RS-485 to be the communication interface. Modbus is also very popular. How ever, no matter Modbus or RS-485, the physical layer are the same. It supports multi-drop connection or daisy-chain. that saves a lot of wiring cost from the star topology.
To bring all the data from the remote site to the center, many engineers are using a stand-alone serial to fiber converter and put a chassis media converter in the center to do the conversion.
In the center, since there are many serial fiber converter modules in the chassis, there must be a multiport serial board, or a multiport device server to bring those data back to computer.
Mosa's ICF-1150 and NRack system can meet this requirement.
The detail application you can go to this link to find more information.
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