IEI Integration PCIE-Q870-i2 - Manual (Page 53)

PCIE-Q870-i2 PICMG 1.3 CPU Card
Page 36
Pin Description Pin Description
1 DCD 2 DSR
3 RXD 4 RST
5 TXD 6 CTS
7 DTR 8 RI
9 GND 10 GND
Table 3-20: RS-232 Serial Port Connector Pinouts
3.2.20 Serial Port Connector, RS-422/485
CN Label: COM2
CN Type: 4-pin wafer
CN Location: See Figure 3-21
CN Pinouts: See Table 3-21
This connector provides RS-422 or RS-485 communications.
Figure 3-21: RS-422/485 Connector Location
Pin Description Pin Description
1 RXD422- 3 TXD422+/TXD485+
2 RXD422+ 4 TXD422-/TXD485-
Table 3-21: 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.