B&B Electronics ESR901WB - Manual - Manual (Page 58)

Manual Documentation Number: ESR901WB-2907m pn6870-rev002
B&B Electronics Mfg Co Inc – 707 Dayton Rd - PO Box 1040 - Ottawa IL 61350 - Ph 815-433-5100 - Fax 815-433-5104 – www.bb-elec.com
B&B Electronics Ltd – Westlink Commercial Park – Oranmore, Galway, Ireland – Ph +353 91-792444 – Fax +353 91-792445 – www.bb-europe.com
48
DB-9M
Pin
RS-422/485
Signal
Label DTE
1 Transmit Data (-) TX A(-) Out
2 Transmit Data (+) TX B(+) Out
3 Receive Data (+) RX B(+) In
4 Receive Data (-) RX A(-) In
5 Ground GND ---
6
7
8
9
Figure 19. RS-422/485 Connections in a DB-9 Connector