RS232-CONVERTERS.COM SERIAL AND USB CONVERTER PRODUCTS SIMA S. ENTERPRISES   1-877-647-7434 SERIAL RS232, RS485, RS422, AND TTL CONVERTERS - USB ADAPTERS  GENDER CHANGERS - FIBER OPTIC CONVERTERS - ETHERNET CONVERTERS

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WORRY FREE GUARANTEE! 30 Day Money Back! • 5 Year Warranty! • Free Shipping! • Same Day Express Shipping! • Industry Proven Highest Quality Products!

With over 10,000 satisfied customers, Sima S. Enterprises offers the finest quality industry proven USB, RS-232, RS-485, RS-422, TTL, Ethernet, and Fiber Optic converters available.  All of our products are shipped the same day ordered and come with a 30 day satisfaction guarantee and a 5 year manufacturer's warranty. FREE WORLDWIDE SHIPPING ON ALL PRODUCTS OPTIONAL SAME DAY EXPRESS SHIPPING UNTIL 7:30 PM EST PRODUCT INVENTORY STATUS:   ALL PRODUCTS IN STOCK

Frequently Asked Questions

Question 29:  HOW DO I PERFORM A LOOPBACK TEST FOR MY RS-232 / RS-485 CONVERTER?

Answer:  Connect two RS-232/RS-485 converters to your PC's COM ports (if your PC does not have enough COM ports, you may use USB to RS-232 converters or cables). Run two instances of hyperterminal software on your PC. When you send commands from one COM port, you should receive the same commands on the other, and vice versa. By performing a simple Loop back Test like this, you can test you RS-485 transceiver, which is very helpful when you are in doubt about the performance of your converters or cables.

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