Ling-Jiang LBOX-270, Руководство пользователя, Страница: 8 / 25

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䈊ؑ ࣑ᇎ ࡋᯠ ቭ䍓
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Serial Port
The serial port is a 1 550A high speed communications port that sends receives 1
bytes FIFOs. You can attach a serial mouse or other serial devices directly to the con-
nector.
RS232 Function
RS485 Function
1 5
6 9
PIN SIGNAL DESCRIPTION
1
DCD
Data Carrier Detect
2
RXD
Receive Data
3
TXD
Transmit Data
4
DTR
Data Terminal Ready
5
GND
Signal Ground
6
DSR
Data Set Ready
7
RTS
Request To Send
8 CTS Clear To Send
9 VCC_COM1 Voltage output, voltage select setting by J1
PIN DESCRIPTION
1 485-, RS-485 transmission line, negative
3 485 , RS-485 transmission line, positive
RS422 Function
PIN DESCRIPTION
1 422TXD-, RS-422 transmission line, negative
2 422RXD , RS-422 receiving line line, positive
3 422TXD , RS-422 transmission line, positive
4 422RXD-, RS-422 receiving line, negative