B&B Electronics VESR4X4 - Manual - Manual (Page 69)

Section 8 - Appendix Vlinx VESR4x4 Serial Server
Page 69 of 70
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Appendix D: Connector Pinouts
DB-9M Connnector
DB-9M Pin RS-232 Direction (RS-232) RS-422/485 4-Wire RS-485 2-Wire
1 DCD Input RDA (-) ---
2 RD Input RDB (+) ---
3 TD Output TDB (+) Data B (+)
4 DTR Output TDA (-) Data A (-)
5 GND --- GND GND
6 DSR Input --- ---
7 RTS Output --- ---
8 CTS Input --- ---
9 --- --- --- ---
Terminal Block
Terminal RS-232 Direction (RS-232) RS-422 RS-485
A RTS Output TDA (-) Data A (-)
B TD Output TDB (+) Data B (+)
C CTS Input RDA (-) ---
D RD Input RDB (+) ---
E GND --- GND GND