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RS-232 Connections
Manual Documentation Number: PES1A/PESV1A-2907m 45
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
1 Carrier Detect DCD In
2 Receive Data RXD In
3 Transmit Data TXD Out
4 Data Terminal Ready DTR Out
5 Signal Ground GND ---
6 Data Set Ready DSR In
7 Request To Send RTS Out
8 Clear To Send CTS In
9 Not Connected NA NA
Figure 21. RS-232 Connections in a DB-9 Connector