查看“EMB-3942 COM”的源代码

[[文件:EMB-3942 COM1，COM2，COM3-6.jpg|600px|缩略图|EMB-3942 COM1，COM2，COM3-6]]
===== COM1： =====
{| class="wikitable"
|-
! 信号名称 !! Pin !! Pin !! 信号名称 
|-
| HDCD#1 || 1 || 2 || HDSR#1
|-
| HSIN1 || 3 || 4 || HRTS#1
|-
| HSOUT1 || 5 || 6 || HCTS#1
|-
| HDTR#1 || 7 || 8 || HRI#1
|-
| GND || 9 || 10 || GND
|}

===== COM2： =====
{| class="wikitable"
|-
! 信号名称 !! Pin !! Pin !! 信号名称 
|-
| HDCD#2TX-DATA- || 1 || 2 || COM2_DSR#
|-
| HSIN2TX+DATA+ || 3 || 4 || COM2_RTS#
|-
| HSOUT2RX+ || 5 || 6 || COM2_CTS#
|-
| HDTR#2RX || 7 || 8 || COM2_RI
|-
| GND || 9 || 10 || GND
|}

===== COM2 跳线功能设置（J1，J2，J3）： =====
:{| class="wikitable"
|-
|colspan=2|COM2  RS232 PORT ||colspan=2|COM2  RS422 PORT   ||colspan=2|COM2  RS485 PORT
|-
| J1 || 1-3  2-4 || J1 || 3-5  4-6 || 	 || 
|-
| J2 || 1-3  2-4 || J2 || 3-5  4-6 || J2 || 3-5  4-6
|-
| J3 || 1-2 || J3 || 3-4 || J3 || 5-6
|}

===== COM3-6： =====
{| class="wikitable"
|-
! 信号名称 !! Pin !! Pin !! 信号名称 
|-
| HDCD#3 || 1 || 2 || HDSR#3
|-
| HSIN3 || 3 || 4 || HRTS#3
|-
| HSOUT3 || 5 || 6 || HCTS#3
|-
| HDTR#3 || 7 || 8 || HRI#3
|-
| GND || 9 || 10 || GND
|-
| HDCD#4 || 11 || 12 || HDSR#4
|-
| HSIN4 || 13 || 14 || HRTS#4
|-
| HSOUT4 || 15 || 16 || HCTS#4
|-
| HDTR#4 || 17 || 18 || HRI#4
|-
| GND || 19 || 20 || GND
|-
| HDCD#5 || 21 || 22 || HDSR#5
|-
| HSIN5 || 23 || 24 || HRTS#5
|-
| HSOUT5 || 25 || 26 || HCTS#5
|-
| HDTR#5 || 27 || 28 || HRI#5
|-
| GND || 29 || 30 || GND
|-
| HDCD#6 || 31 || 32 || HDSR#6
|-
| HSIN6 || 33 || 34 || HRTS#6
|-
| HSOUT6 || 35 || 36 || HCTS#6
|-
| HDTR#6 || 37 || 38 || HRI#6
|-
| GND || 39 || 40 || GND
|}