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NION supports serial communications via two female DB-9 connectors on the rear of the unit. The first connector supports RS‑232 and the second supports both RS‑422 full duplex and RS‑485 half‑duplex.
Follow the pinout drawings and charts below for terminating the different protocols.
Note: Only one protocol can be used on a particular port at any one time.
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In this section RS-422/485 serial port in RS-422 mode |
See also |
Pin |
Function |
1 |
Not used |
2 |
TX data |
3 |
RX data |
4 |
Not used |
5 |
Ground |
6 |
Not used |
7 |
CTS |
8 |
RTS |
9 |
Not used |
Notes: