This LPC FMC card has eight channels, RS-xxx interfaces. The Channels are factory-defined/built when ordering the board.
Possible combinations/interfaces are: X * RS232 + Y * RS422 + Z * RS485 where X+Y+Z = 8 ( for 8 channels ).
When ordering FMC-RSxxx-8, a customer needs to define X, Y, and Z.
The module can also be used as a PMOD interface. Please see the 4 block diagrams for potential combinations.
There is a breakout board and cable assembly that allows the ports to be accessed via DB9 connector.