B&B Electronics MES1A - Appendix D: Serial Connections

RS-232 Connections
Manual Documentation Number: MES1A/MES1B-2106m PN7138-rev001
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
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DB-9M
Pin
Signal RS-232 DTE
2 Receive Data RXD In
3 Transmit Data TXD Out
5 Signal Ground GND ---
Figure 37. RS-232 Connections for DB-9 Connector
Signal Name Label Direction Terminal
Receive Data (+) RDB(+) In 1
Receive Data (-) RDA(-) In 2
Transmit Data (+) TDB(+) Out 3
Transmit Data (-) TDA(-) Out 4
Signal Ground GND --- 5
Figure 38. MES1B Terminal Block Pin-out for RS-422/485 Four-Wire
Operation