User Manual

14 Introduction

1.3.8 COM Port

A COM port on the front panel with D-sub 9P connectors supports

RS-232/RS-422/RS-485 by BIOS selection.

Figure 1-6: COM Port

Table 1-7: D-Sub 9p COM Port Signal Functions

Signal Name

RS-232 RS-422 RS-485

1 DCD# TXD422- 485DATA-

2 RXD TXD422+ 485DATA+

3 TXD RXD422+ N/S

4 DTR# RXD422- N/S

5 GND N/S N/S

6 DSR# N/S N/S

7 RTS# N/S N/S

8 CTS# N/S N/S

9 RI# N/S N/S

1 5