Add to Cart
Technical details:
Signal definition of RS485/422 connection terminal
Signal-name | description |
D+ | RS485 signal positive |
D- | RS485 signal is negative |
TXD+ | RS422 signal sending positive |
TXD- | RS422 signal sending negative |
RXD+ | RS422 signal receiving positive |
RXD- | RS422 signal receiving negative |
SG | Signal ground |
FG | Shielding groundchassis ground |
RS232 socketDB9M
Pin number | Signal-name | description |
1 | +5V | External connect 5V assistant power supply, use when the power supply of RS232 is not sufficient |
2 | RXD | RS232 signal receive |
3 | TXD | RS232 signal send |
4 | DTR | Get data terminal ready,have short connected with 6 |
5 | GND | Signal ground |
6 | DSR | Get data device ready,have short connected with 4 |
7 | RTS | Request to send, have short connected with 8 |
8 | CTS | Allow to send, have short connected with 7 |
9 | Not be used | Not be used |