9. Appendices
Vlinx MESR9xx Modbus Gateway
Page 53
Manual Documentation Number MESR9xx-4508m
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MESR902D-x Serial Port Pinouts
DB-9M Pin
RS-232
RS-422
RS-485
1 DCD
RXA(-) ---
2 RXD
RXB(+)
---
3 TXD
TXB(+)
DATA+
4 DTR
TXA(-)
DATA-
5 GND GND GND
6 DSR --- ---
7 RTS --- ---
8 CTS --- ---
9 RI --- ---