Bb-electronics 3PCI2 Manual do Utilizador descarregar pdf (Página 55)

50 Chapter 7 Documentation Number 3PCI2-0903 Manual

B&B Electronics Mfg Co – 707 Dayton Rd - PO Box 1040 - Ottawa IL 61350 - Ph 815-433-5100 - Fax 815-433-5104

B&B Electronics Ltd – Westlink Comm. Pk. – Oranmore, Galway, Ireland – Ph +353 91-792444 – Fax +353 91-792445

3. Run Setup.exe to install COMTest on your program menu

under B&B Electronics.

4. Check your Card Jumpers, and Driver Settings. See Chapter 2.

5. Make sure you have DTR Operation set to the correct mode.

Normal for RS-232, RS-485 Mode for RS-485. RS-422 mode

works in either setting provided that the mode jumpers are set

correctly.

6. A loopback connection for RS-232 connects the Transmit

output to the Receive input (pins #2 & #3 on the DB9

connector). Use connections below to check all.

Fig. 7.1 RS-232 Loopback w/Handshaking Connections

7. For RS-422 or 4-wire RS-485, connect the TD(A) to RD(A) and

the TD(B) to RD(B). Then use the COMTest program to send

characters, and observe the characters being received.

Fig. 7.2 RS-422 or 4-wire RS485 Loopback Connections

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Bb-electronics 3PCI2 Manual do Utilizador Página 55