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WORRY FREE GUARANTEE! 
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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.
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Frequently Asked Questions
GENERAL QUESTIONS
- WHAT SHOULD I KNOW ABOUT THE SATISFACTION GUARANTEE?
- WHAT SHOULD I KNOW ABOUT THE PRODUCT WARRANTY?
- WHAT IS OUR PAYMENT POLICY?
- WHAT IS OUR SHIPPING POLICY?
- IS OUR WEBSITE CHECKOUT CREDIT CARD PROCESSING SECURE?
- WHAT ARE OUR TERMS AND CONDITIONS?
- WHAT IS OUR PRIVACY POLICY?
- WHO IS SIMA S. ENTERPRISES LLC?
GENERAL RS-232 / RS-485 / RS-422 QUESTIONS
- WHAT IS DTE / DCE? HOW DO I KNOW MY RS-232 DEVICE IS A DTE OR A DCE?
- WHAT ARE HANDSHAKE LINES?
- DO I NEED TO USE HANDSHAKE LINES TO CONTROL THE DATA DIRECTION?
- HOW DO I EXTEND THE RS-232 LINE DISTANCE?
- WHAT IS SMT? WHAT ARE THE BENEFITS OF USING SMT CIRCUITRY?
- WHAT IS GND? CAN I CONNECT IT TO THE EARTH?
SERIAL CONVERTER QUESTIONS
- CAN I PLUG / UNPLUG THE CONVERTERS WHILE THEY ARE BEING USED?
- DO I NEED TO SET THE BAUD RATE ON THE CONVERTERS FOR THEM TO WORK?
- MY CONTROL SOFTWARE REQUIRES HANDSHAKE LINES TO BE TIED TOGETHER (EXAMPLE DTR TO DCR OR RTS TO CTS) CAN I STILL USE THE CONVERTERS?
- WHAT IS THE MAXIMUM DISTANCE THE CONVERTERS CAN COMMUNICATE WITH REMOTE DEVICES?
- WHAT IS THE CURRENT CONSUMPTION OF THE CONVERTERS?
- HOW MANY SERIAL DEVICES CAN I CONNECT WITH THE PORT-POWERED CONVERTERS?
- WHEN DO I NEED TO USE TERMINATION?
- WHICH TYPE OF CABLE IS RECOMMENDED FOR RS-485 / RS-422 CONNECTIONS?
- WILL THE CONVERTERS WORK WITH NEW COMPUTERS?
- WILL THE CONVERTERS WORK WITH USB TO RS-232 CABLES?
- CAN I USE YOUR CONVERTERS WITHOUT USING THE TERMINAL BLOCKS?
OPTO-ISOLATION QUESTIONS
- WHAT IS ANTI-STATIC PROTECTION CIRCUITRY? IS IT A LIGHTNING ARRESTOR?
- WHAT IS OPTO-ISOLATION? WHAT ARE THE BENEFITS OF USING OPTO-ISOLATED CONVERTERS?
- WHAT ARE THE DIFFERENCES OF USING SURGE SUPPRESSORS AND OPTO-ISOLATORS?
TROUBLESHOOTING QUESTIONS
- HOW DO I PERFORM A LOOPBACK TEST FOR MY RS-232 / RS-485 CONVERTER?
- HOW DO I PERFORM A LOOPBACK TEST FOR MY RS-232 / RS-422 CONVERTER?
- HOW DO I PERFORM A LOOPBACK TEST FOR MY RS-232 / TTL CONVERTER?
- HOW DO I PERFORM A LOOPBACK TEST FOR MY RS-232 COM PORT?
FIBER OPTIC CONVERTER QUESTIONS
- WHAT IS FIBER OPTICS?
- WHAT ARE THE ADVANTAGES OF FIBER OPTIC SYSTEMS?
- WHAT DO I NEED TO USE FIBER OPTIC SYSTEMS?
- WHAT DOES A TYPICAL FIBER OPTIC SYSTEM CONSIST OF?
- WHAT IS THE DIFFERENCE BETWEEN SINGLE-MODE (SM) AND MULTI-MODE (MM)?
- WHAT ARE THE USABLE FIBER OPTIC CABLES FOR OUR FIBER OPTIC PRODUCTS?
- WHAT CONNECTOR TYPES DOES OUR FIBER OPTIC PRODUCTS COME WITH?
- WHAT IS THE WAVELENGTH FOR OUR FIBER OPTIC PRODUCTS?
- HOW MANY CORES OF THE FIBER OPTIC CABLE DO I NEED IN ORDER TO CONNECT OUR FIBER OPTIC CONVERTERS?
- WHAT IS THE MAXIMUM DISTANCE FOR THE RS-232, RS-485 AND RS-422 CONNECTIONS OF THE FIBER OPTIC CONVERTER?
- WHAT IS THE MAXIMUM DISTANCE FOR 10 OR 100M ETHERNET OF THE FIBER OPTIC CONVERTER?
- WHAT ARE THE TYPICAL FIBER LINK DISTANCES FOR OUR PRODUCTS?
- CAN I CONNECT AN RS-232 DEVICE TO ONE SIDE AND CONNECT RS-485 OR RS-422 DEVICES TO THE OTHER SIDE OF THE FIBER LINK?
- ARE THERE ANY JUMPER OR DIP SWITCH SETTINGS FOR SERIAL DATA TYPES OR BAUD RATES FOR YOUR RS-232 / RS-485 / RS-422 TO FIBER OPTIC CONVERTER?
- ARE THERE ANY JUMPER OR DIP SWITCH SETTINGS FOR 10/100M OR REGULAR / UPLINK PORT FOR THE ETHERNET TO FIBER OPTIC CONVERTER?
- WHAT ARE THE SUPPORTED BAUD RATES FOR YOUR RS-232 / RS-485/ RS-422 TO FIBER OPTIC CONVERTER?
- HOW MANY NODES CAN I CONNECT THE RS-485 OR RS-422 OF THE FIBER OPTIC CONVERTER?
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