B&B Electronics VESR321_ML_SL - Manual - Manual (Page 42)

Glossary
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38
VESR321 Series
DB9M 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 A (-)
4 DTR Output TDA (-) Data B (+)
5 GND --- GND GND
6 DSR Input --- ---
7 RTS Output --- ---
8 CTS Input --- ---
9 -- -- --- ---