Chengdu Vantron Technology Ltd. VTM2MBTA-DE 用户手册
VT-M2M-BTA-DE
3.5.3 D Sub-9 RS232 Connector
Standard vertical DB-9 male connector
Pin
Description
Remarks
1
DCD1/422TX+/485_A
BIOS set
2
RXD1/422TX-/485_B
BIOS set
3
TXD1/422RX+
BIOS set
4
DTR1/422RX-
BIOS set
5
DGND (ground pin)
6
DSR1
7
RTS1
8
CTS1
9
RI1