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SERIAL RS232 TO RS422 CONVERTERS

SerialComm offers the highest quality, high performance RS232 to RS422 converter products with free shipping and same day express shipping starting at $14.95. Whether you are looking for industrial or commercial, port or externally powered, standard or isolated RS232 to RS422 converters, we have the solution. All of our RS232 to RS422 converters are industry-proven and both Sima S. Enterprises and SerialComm are ISO-9001:2015 TÜV certified data communication product suppliers. The superior quality and reliability of our serial converter products are designed for the most demanding mission critical applications. Our communication products provide cost-effective solutions that are safe and reliable for all your data conversion and device protection applications for any experienced engineer interfacing to their expensive industrial equipment, yet simple enough for home use by an amateur hobbyist. Sima S. Enterprises is committed to providing highest quality products on the market as well as the best customer support with 24 hour telephone tech support and general customer support.

  • The SerialComm CON-422-PE9 is a high quality, high performance, port-powered RS232 To RS422 converter with DB9 or two included terminal blocks; one for rugged applications and the other with built-in selectable 120 Ohm termination via jumper for maximum flexibility and reliability. This converter features ESD and surge protection in a 9 pin format and is enclosed in a resilient housing. The CON-422-PE9 is bi-directional with autosensing, auto-turnaround which means it will not only convert from RS232 to RS422 but RS422 to RS232 with no software drivers or flow control. Our converters are protected by a 5-year warranty and 30-day money back guarantee. 300 to 115.2K Baud Operation.

    Price: $14.95
  • The SerialComm CON-422-PIE is a high quality, high performance, industrial-grade port-powered or externally powered RS232 to RS422 converter with DB9 or an included terminal block. This converter features ESD and surge protection in a 9 pin format and is enclosed in a resilient housing. The CON-422-PIE is bi-directional with autosensing, auto-turnaround which means it will not only convert from RS232 to RS422 but RS422 to RS232 with no software drivers or flow control. Our converters are protected by a 5-year warranty and 30-day money back guarantee. 300 to 115.2K Baud Operation.

    Price: $16.95
  • The SerialComm CON-422-PE25 is a high quality, high performance, port-powered RS232 to RS422 converter with ESD and surge protection in a 25 pin format and is enclosed in a resilient housing. The CON-422-PE25 is bi-directional with autosensing, auto-turnaround which means it will not only convert from RS232 to RS422 but RS422 to RS232 with no software drivers or flow control. Our converters are protected by a 5-year warranty and 30-day money back guarantee. 300 to 115.2K Baud Operation.

    Price: $24.95
  • The SerialComm CON-485/422-PI9 is a high quality, high performance, industrial-grade, port-powered RS232 to RS485/RS422 converter with DB9 or an included multi-functional terminal block featuring built-in selectable 120 Ohm termination jumper for easy installation. This converter features ESD and surge protection in a 9 pin format and is enclosed in a resilient housing. The CON-485/422-PI9 is bi-directional with autosensing, auto-turnaround which means it will not only convert from RS232 to RS485/RS422 or RS485/RS422 to RS232 without any software drivers or flow control. Our converters are protected by a 5-year warranty and 30-day money back guarantee. 300 to 115.2K Baud Operation.

    Price: $25.95
  • The SerialComm CON-485/422-EE9 is high quality, high performance, industrial-grade standalone, panel or rack mounted externally powered opto-isolated RS232 to 2-Wire RS485 or 4-Wire RS422 converter enclosed in a heavy-duty steel housing with an included terminal block with selectable 120 Ohm termination via jumper for easy installation. This heavy duty converter features ESD and surge protection in a 9 pin or RJ45 format. The CON-485/422-EE9 is bi-directional with autosensing, auto-turnaround which means it will not only convert from RS232 to RS485/RS422 but RS485/RS422 to RS232 while providing 2500V optical isolation up to 115.2K baud without the need for software drivers or flow control. The unit can be used to extend RS232 data up to 6000ft (1.8km). It is also externally powered so you do not have to worry about your RS232 device's ability to port-power the converter. This converter features optical isolation circuitry, which effectively protects your devices from voltage surges, lightning, noise and ground loop conditions. Our converters are protected by a 5-year warranty and 30-day money back guarantee. 0 to 115.2K Baud Operation.

    Price: $39.95
  • The SerialComm CON-485/422-EE4 is high quality, high performance, industrial-grade standalone, panel or rack mounted externally powered opto-isolated RS232 to 4-Wire RS485 or 4-Wire RS422 converter enclosed in a heavy-duty steel housing with an included terminal block with selectable 120 Ohm termination via jumper for easy installation. This heavy duty converter features ESD and surge protection in a 9 pin or RJ45 format. The CON-485/422-EE4 is bi-directional with autosensing, auto-turnaround which means it will not only convert from RS232 to RS485/RS422 but RS485/RS422 to RS232 while providing 2500V optical isolation up to 115.2K baud without the need for software drivers or flow control. The unit can be used to extend RS232 data up to 6000ft (1.8km). It is also externally powered so you do not have to worry about your RS232 device's ability to port-power the converter. This converter features optical isolation circuitry, which effectively protects your devices from voltage surges, lightning, noise and ground loop conditions. Our converters are protected by a 5-year warranty and 30-day money back guarantee. 0 to 115.2K Baud Operation.

    Price: $45.95
  • The SerialComm CON-485/422-REP is high quality, high performance, rugged and industrial-grade standalone, panel or rack mounted externally powered opto-isolated bi-directional RS232 to 2-Wire RS485 or 4-Wire RS422 converter, RS485 to RS422 converter, RS485 repeater and RS422 repeater. The CON-485/422 REP offers 2500V optical isolation which effectively protects your devices from voltage surges, lightning, noise and ground loop conditions. The unit can be used to extend RS232 data up to 6000ft (1.8km). This is our most versatile serial converter with DC input from 12V to 36V or AC input from 100VAC to 240VAC. This converter comes with built-in terminal blocks and housed in a steel case. Our converters are protected by a 5-year warranty and 30-day money back guarantee. 0 to 115.2K Baud Operation..

    Price: $79.95
11 Important Factors in Choosing the Right RS232 to RS422 Converter
Why do terminal blocks make installation simple?

For RS232 to RS422 adapters an included terminal block is very important. Some converters on the market do not come with them. A terminal block is a screw down wire adapter that attaches to the DB9 serial adapter. It simplifies cable installation to attached cables such as CAT5 or CAT5e without the need to make a custom cable or adapter. Without the terminal block a custom cable needs to be made and that can be time consuming and expensive. Even if you are using the DB9 in your present installation it makes sense to have one for future applications. All of our high quality RS232 to RS422 converters include terminal blocks at no extra charge

How and why is 120 OHM termination used?

Some of our RS232 to RS422 converters come with terminal blocks with 120 Ohm termination selectable via a jumper on the terminal block. 120 Ohm is an advanced feature that impedance matches the cable system. In some cases where the cable runs are greater then 600 feet or baud rate is over 19.2K there could be noise or reflections on the RS422 lines resulting in unreliable communication. In most cases, 120 ohm termination is not required but without the easy to use selectable 120 Ohm termination resistor on the terminal block, the resistor may have to be soldered on the ends of the cable runs making it an undesirable situation.

Why are two terminal blocks included with some converters?

Some of our RS232 to RS422 converters include two terminal blocks as a convenience. One terminal block is sealed for better immunity from the elements and rugged while the other has a 120 ohm termination selectable jumper. Both terminal blocks are of the highest quality and can be used in most applications. Claims that a terminal block with a friction held jumper is rugged and vibration resistant is very misleading. SerialComm gives the customer to option to use a terminal block with the friction held jumper or without.

Is optional external power necessary?

Many RS232 to RS422 converters are port-powered. They derive power from the RS232 TX data signal using a capacitor charge pump. In most applications, especially if you are interfacing the RS232 to a host computer, port-power will work. In a very small percentage of cases where the RS232 port is not capable of port-powering the converter optional external power is helpful. Most RS232 ports provide from +/-6V to +/-12V signals where our port-power converters will almost always work. In the case where the signal is less then +/-6V the external power will supplement the powering of the converter. Our CON-485/422-EE9, CON-485/422-EE4 and CON-485/422-REP converters are not port-powered at all and rely solely on external power.

Do I need commercial or industrial grade?

Our RS232 to RS422 Converters come in Commercial and industrial grades. They basically operating temperature range classifications. Commercial grade has a typical temperature range of 32ºF to 158ºF (0ºC to 70ºC). For most indoor (home, lab or server room) applications this is sufficient and extended temperature ranges are not required because these locations are temperature controlled. Industrial classified devices have extended temperature ranges. Industrial grade typically has a temperature range from -40ºF to 185ºF (-40ºC to 85ºC). Commercial grade verses industrial grade has nothing to do with reliability engineering, vibration or shock susceptibility and other environmental factors. Please see the associated Wikipedia article for more information on temperature range classifications.

Are rugged converters really necessary?

Ruggedized converters are converters that are not susceptible to vibration and shock and must be specially reliability tested for that. Ruggedized converters are not really needed in most applications unless you are in an environment susceptible to vibration and other adverse environmental factors such as off-roading, on a boat or a plane. Some of our converters come with two terminal blocks one rugged and the other with 120 ohm selectable jumper. Both terminal blocks are of the highest quality and can be used in any application but SerialComm believes a terminal block with a friction held jumper cannot be ruggedized or vibration resistant and that is why give the customer the option of a terminal block without any friction held jumpers.

Are regular or opto-isolated converters needed?

SerialComm offers both regular and opto-isolated RS232 to RS422 converters. Opto-isolated converters are usually used outdoors or in applications with noise or ground loop problems. There is no electrical signal path between one connector and the other and use optical LEDs to transfer data. This will protect your devices from voltage spikes and lighting and make the converter less susceptible to noise and ground loops. Opto-isolation is not surge suppression and the difference is a damaging voltage surge might destroy the converter and not the device it is protecting thus protecting your expensive device or computer.

How is quality engineering & standardized product testing important?

Quality engineering and standardized product testing is an important factor to ensure reliability in our RS232 to RS422 converter products. SerialComm products have an industry proven high reliability rate over 99% and are CE, FCC and RoHS certified as well as adhere to our ISO-9001:2008 quality program. And because of this, we offer a 5-year Replacement Warranty on our products. As part of our commitment to providing the highest quality and reliable products some of the tests performed on our products include temperature, EMI emissions and EMI radiation susceptibility and other environmental tests.

Importance of 12/7 telephone technical and customer service support?

We offer 24/7 telephone support as well as email support with quick turnaround. Some companies only offer email support. Serialcomm is dedicated to its products and customer support. If you need technical help or have a question you want to be assured you can talk to an engineer/customer/sales support at your schedule without having to wait for an email response that can take days.

Why we do not charge restocking fees?

A restocking fee is a handling charge that some companies charge when product is returned. Customers should be careful of companies that charge as high as a 20% restocking fee with the only customer disclosure in their Terms and Conditions statement. At Serialcomm we give you 30 days to decide whether you want to return the product at a full refund without any penalties or additional fees.

How free shipping and guaranteed express important?

We offer free shipping on all our products. This is a major savings for our customers. We do not offer a very low price and then add extra charges on the shipping to make up for the low price. We also offer optional expedited services by FEDEX, UPS and DHL. We offer FEDEX express services up to 7:00 PM EST or 4:00 PST which is the most flexible schedule on the market. If you decide to use your courier account we do not add any additional handling charges. We pride ourselves in our track record of getting packages to FEDEX on time.

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