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ISOLATORS, OPTO-ISOLATED CONVERTERS & SURGE SUPPRESSORS

SerialComm offers the highest quality, high performance RS232/RS485/RS422 Opto-isolated converter and surge suppressor products with free shipping and same day express shipping starting at $26.95. Opto-isolated converters protect attached devices from voltage surges and lightning strikes and also provide some immunity from noise and ground loop conditions. All of our isolators and surge suppressors 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 ISO-232-3P9 is a high quality, high performance, industrial-grade high speed 3-wire (TX, RX, GND) opto-isolated port powered RS232 isolator with ESD and static protection in a 9 pin format and is enclosed in a resilient housing. ISO-232-3P9 is bi-directional and will provide signal 5000V optical isolation to any standard serial RS232 device up to almost 1 mbps providing voltage surge, ground loop and noise protection. Our converters are protected by a 5-year warranty and 30-day money back guarantee. 300 to 912.6K Baud Operation.

    Price: $26.95
  • The SerialComm ISO-232-8E is a high quality, high performance, industrial-grade 8-wire (TX, RX, DTR, DSR, CTS, RTS, RI, and GND) opto-isolated externally powered RS232 isolator with ESD and static protection in a 9 pin format and is enclosed in a resilient housing. ISO-232-8E is bi-directional and will provide signal 2500V optical isolation to any standard serial RS232 device providing voltage surge, ground loop and noise protection. Our converters are protected by a 5-year warranty and 30-day money back guarantee. 300 to 115.2K Baud Operation.

    Price: $44.95
  • The SerialComm ISO-485-P is a high quality, high performance, industrial-grade passive 2-wire (485+ 485-) RS485 surge suppressor with built-in terminal blocks. The surge suppressor is compact and enclosed in a heavy-duty steel casing. It provides 3 levels of surge suppression and can protect any standard RS485 port from transients, peaks, and spikes caused by lightning and other power surges. The ISO-485-P can also resolve ground loop and noise problems. The ISO-485-P protects the 2 lines: 485+ and 485-. The unit is passive, therefore, no external power or flow control is required. Our converters are protected by a 5-year warranty and 30-day money back guarantee. 300 to 115.2K Baud Operation.

    Price: $56.95
  • The SerialComm ISO-ETH-P is a high quality, high performance, industrial-grade passive 10/100M Ethernet surge suppressor. The surge suppressor is compact and enclosed in a heavy-duty steel casing. It provides 3 levels of surge suppression and can protect any standard Ethernet port from transients, peaks, and spikes caused by lightning and other power surges. The ISO-ETH-P can also resolve ground loop and noise problems. The unit is passive, therefore, no external power or flow control is required. Our converters are protected by a 5-year warranty and 30-day money back guarantee. Up to 100Mbps Operation.

    Price: $29.95
  • The SerialComm REP-485/422-9E is a high quality external powered industrial bi-directional 2.5KV isolated RS485 to RS422 converter. It will also Isolate or extend RS485 or RS422 up to 4000 feet (1.2km). This converter features two DB9 connectors with two optional terminal blocks. The separate terminal blocks are optional and included with purchase. Our converters are protected by a 5-year warranty and 30-day money back guarantee. Up to 115.2K bps Operation.

    Price: $59.95
  • The SerialComm CON-485/422-REP is a rugged industrial-grade high quality external powered bi-directional 3KV isolated RS485 to RS422 or RS232 to RS485 or RS422 converter. It will also isolate or extend RS485 or RS422 up to 9800 ft (3km). 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. Up to 115.2K bps Operation.

    Price: $79.95
  • The SerialComm ISO-485-PI9 is a high quality, high performance, industrial-grade opto-isolated port-powered RS232 to RS485 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 ISO-485-PI9 is bi-directional with autosensing, auto-turnaround which means it will not only convert from RS232 to RS485 but RS485 to RS232 while providing 2500V optical isolation without any software drivers or flow control. This RS232 to RS485 converter optically isolated featuring isolation circuitry that 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. 300 to 57.6K Baud Operation.>

    Price: $56.95
  • 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
7 Important Factors in Choosing the Right Opto-Isolated Converter or Surge Suppressor
How do opto-isolators and isolated converters work?

Opto-isolators use optical LEDs and photosensitive transistors to isolate two serial devices. There is no electrical path from one connected serial device to the other connected serial device. Opto-isolated converters protects your RS232/RS485/RS422 devices from transient surges, lightning and voltage spikes. Opto-isolators also eliminate noise and ground loop because the ground signals of two connected devices are separated.

How do surge suppressors work?

Surge suppressors limit and suppress voltage levels above a certain voltage threshold. Our RS485 and Ethernet surge suppressors are passive devices with voltage protection circuitry and have multiple levels of protection.

What is the difference between opto-isolation and surge suppression?

Opto-isolation differs for surge suppressors in the method of voltage spike protection. Opto-isolators protect by eliminating a electrical path between the two connected serial devices where suppressors actually suppress the voltage level. If a device damaging voltage spike strikes a opto-isolated converter it will damage the converter but at the same time protect the expensive equipment it is attached to.

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 RS485 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-9001:2015 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 6:30 PM EST or 3:30 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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