查看“BPC-7924-COM”的源代码

===== COM1-COM3： =====
:{| class="wikitable"
|-
! Pin !! 信号名称
|-
| 1 || DCD
|-
| 2 || RXD
|-
| 3 || TXD
|-
| 4 || DTR
|-
| 5 || GND
|-
| 6 || DSR
|-
| 7 || RTS
|-
| 8 || CTS
|-
| 9 || RI
|}

''' 当COM1，COM2设置为RS232/RS422/RS485时，COM1,COM2定义： '''
:{| class="wikitable"
|-
! Pin !! RS232（默认） !! RS422 !! RS485
|-
| 1 || DCD || TX- || DATA-
|-
| 2 || RXD || TX+ || DATA+
|-
| 3 || TXD || RX+ || NC
|-
| 4 || DTR || RX- || NC
|-
| 5 || GND || GND || GND
|-
| 6 || DSR || NC || NC
|-
| 7 || RTS || NC || NC
|-
| 8 || CTS || NC || NC
|-
| 9 || RI || NC || NC
|}

* COM1，COM2 跳线功能设置（J1，J2，J3，J4，J5，J6）：
:{| class="wikitable"
|-
! COM1 !! AS RS232 PORT !! COM1 !! AS RS422 PORT !! COM1 !! AS RS485 PORT
|-
| J4 || 1-3  2-4 || J4 || 3-5  4-6 || J4 || 3-5  4-6
|-
| J5 || 1-3  2-4 || J5 || 3-5  4-6 || J5 || 3-5  4-6
|-
| J6 || 1-2 || J6 || 3-4 || J6 || 5-6  7-8
|}

:{| class="wikitable"
|-
! COM2 !! AS RS232 PORT !! COM2 !! AS RS422 PORT !! COM2 !! AS RS485 PORT
|-
| J1 || 1-3  2-4 || J1 || 3-5  4-6 || 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  7-8
|}

''' COM3-COM6： '''
:{| class="wikitable"
|-
! 信号名称 !! Pin !! Pin !! 信号名称
|-
| DCD# || 1 || 2 || DSR#
|-
| SIN || 3 || 4 || RTS#
|-
| SOUT || 5 || 6 || CTS#
|-
| DTR# || 7 || 8 || RI#
|-
| GND || 9 || 10 || COM_PIN10
|}

''' J9： '''
:{| class="wikitable"
|-
! Pin !! 信号名称
|-
| 1 || +5V
|-
| 2 || COM_PIN10
|-
| 3 || +12V
|}