2-WIRE RS-485 TESTING
USING LOOPBACK OR WITHOUT LOOPBACK
PAGE 2 OF 9
Windows 95/98/SE/ME/2000 or NT 4.0: Use ComTest from our Website to check serial ports
assigned Com1 or higher under Windows. It can access Com ports 1-8, including USB serial
devices. ComTest will let open two different ports to check data from one to another or set DTR
high to power a port powered device and raise RTS to transmit and lower it to receive with RTS
controlled Converters or ports. ComTest Features are listed starting on page 8 of this FAQ.
MS-DOS: Use Simpterm from our Website to check motherboard or ISA based serial ports under
DOS. Do not use SimpTerm with Windows. The procedure is similar, but operating details are
different.
Download & Install The Program
1. Before starting, make a Directory Folder (such as Test) on your hard drive to use when
downloading the program.
2. Go to the B&B Electronics Mfg. Co. Website. http://www.bb-elec.com
3. Select Support
4. View the right sidebar for Most Popular Downloads, Software
5. Select ComTest
6. Download into the directory (Test) you previously made.
7. Quit your web browser.
8. Open the directory (Test) you downloaded to.
9. Double-click com_test.exe
10. After file extraction is done, close the DOS window.
11. Double-click Setup within the Test folder.
12. Click Next, then Click Next.
13. Select destination directory. (default is C:\Program Files\B&B Electronics)
14. Click Next.
15. Click Finish button after “Installation Complete” message.
Note: If operating under Windows, a Com port number must be assigned by Windows, and it
must not be used by a serial mouse or open by another application.
MAKE DATA CONNECTIONS
Refer to the figures for Serial Card connectors, RS-485 Converters with Echo or RS-485
Converters without Echo. Set the Echo On or Receiver to RS-422 mode (4-wire 485 mode).
When the connectors use DB9, DB25 or RJ11 connectors, It is usually easiest to wire a matching
connector or cable according to the pinouts. Refer to figures.
Some models can be looped back with switches as below:
485DRJ - sw1 - set on, sw2 - set on, sw4 - set off
485DRC or 485LDRC -sw3 - set on, sw4 - set on, sw2 - off (on is up and away from PCB)
485OT9L or 485OTLED - sw6 - on (2W), sw7 - on (2W), sw5 - off (on is toward outside/case)
Note: DB9 & DB25 pin numbers are molded into the connector. To locate pin #1 on the male
connector hold the connector horizontally with the row with the most pins on top, the upper
leftmost pin is #1. On a female connector, the upper rightmost is #1.
(123 strony)
Manymanuals.com
Manymanuals.de
Manymanuals.fr
Manymanuals.it
Manymanuals.pl
Manymanuals.cz
Manymanuals.es
Manymanuals-pt.com
Komentarze do niniejszej Instrukcji