IEI Integration IMB-Q870-i2 - Manual (Page 55)

IMB-Q870-i2 microATX Motherboard
Page 39
Figure 3-21: RS-422/485 Connector Location
PIN NO. DESCRIPTION
1 RXD422-
2 RXD422+
3 TXD422+/TXD485+
4 TXD422-/TXD485-
Table 3-20: RS-422/485 Connector Pinouts
Use the optional RS-422/485 cable to connect to a serial device. The pinouts of the DB-9
connector are listed below.
RS-422 Pinouts RS-485 Pinouts
Table 3-21: DB-9 RS-422/485 Pinouts