User`s manual

MXGD Series CyberResearch

Motherboards

4.2.15 Serial Port Connector (COM 2)(RS-232, RS-422 or RS-485)

CN Label: COM2

CN Type:

14-pin header (2x7)

CN Location: See Figure 4-16

CN Pinouts: See Table 4-18

The 14-pin serial port connector connects to the COM 2 serial communications channels.

COM 2 is a multi function channel. In default mode COM 2 is an RS-232 serial

communication channel but, with the COM 2 function select jumper, can be configured as

either an RS-422 or RS-485 serial communications channel.

Figure 4-16: RS-232/422/485 Serial Port Connector Location

PIN NO. DESCRIPTION PIN NO. DESCRIPTION

1 DCD 2 DSR

3 RXD 4 RTS

5 TXD 6 CTS

7 DTR 8 RI

9 GND 10 GND

11 TXD+ 12 TX-

13 RX+ 14 RX-

Table 4-18: RS-232/RS-485 Serial Port Connector Pinouts