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RS232 / RS485 / RS422 REPEATERS

SerialComm offers the highest quality, high performance RS232/RS485/RS422 repeater products with free shipping and same day express shipping. All of our RS232/RS485/RS422 repeaters 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 REP-232-3P is a pair of high quality, high performance. industrial-grade port powered 3-wire RS232 data line extenders with included DB9 or terminal block. This converter pair features optical isolation in a 9 pin format and is enclosed in a resilient housings. The pair of REP-232-3P will extend the distance of the RS232 RX and TX data lines up to 4000 feet (1.2km) while providing voltage surge protection. The repeaters are 2500V opto-isolated to protect from lightning strikes and voltage surges. This product will also handle grounding issues and noise conditions as well. Our converters are protected by a 5-year warranty and 30-day money back guarantee. 300 to 115.2K Baud Operation. MTBF: 301,963 Hours

    Price: $39.95 - PAIR
  • The SerialComm REP-232-7P is a pair of high quality, high performance, industrial-grade port powered 7-wire RS232 data and handshake line extenders with included DB9 or terminal block. The pair of REP-232-7P will extend the distance of any RS232 RX and TX data lines as well as the CTS, RTS, DTR and DSR handshake lines up to 4000 feet (1.2km). The repeaters are 2500V opto-isolated to protect from lightning strikes and voltage surges. This product will also handle grounding issues and noise conditions as well. Our converters are protected by a 5-year warranty and 30-day money back guarantee. 300 to 115.2K baud. MTBF: 306,066 Hours

    Price: $44.95 - PAIR
  • The 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. Operates reliably from 300 to 115.2K baud. MTBF: 340,911 Hours

    Price: $59.95
  • 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. Operates reliably from 300 to 115.2K baud. MTBF: 345,141 Hours.

    Price: $79.95
11 Important Factors in Choosing the Right RS232/RS485/RS422 Repeater
Why do terminal blocks make installation simple?

For RS232/RS485/RS422 repeaters 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 RS485/RS485 converters/repeaters include terminal blocks at no extra charge.

Why RS232 extenders are better solutions than RS485/RS422 as an extender?

Although RS485 and RS422 converters can be used to extend the distance of the RS232, the RS232 extenders are a better solution because they are more economical. The REP-232-3P and REP-232-7P are isolated and full duplex and are much more cost effective then the RS485 and RS422 converters.

What is the difference between the REP-232-3P and REP-232-7P?

The REP-232-3P is a RS232 data line extender. It extends the distance of the RX and TX data lines. The REP-232-7P is RS232 data and handshake signals extender. It extends the data lines RX and TX as well as the handshake lines CTS, RTS, DTR and DSR.

At what distance can the RS232 extender communicate reliably?

The RS232 port normally has a distance limitation of 50 ft (15 m) depending on the driving RS232 port. The RS232 extender converter pair will reliably extend the distance of the RS232 signal up to 4000 ft (1.2 km). If you need to extend the distance further then that we would recommend using the RS232 to fiber optic converter which can extend the distance up to 12.5 miles (20 km).

Why are the RS232 extenders sold in pairs?

The REP-232-3P and REP-232-7P RS232 extenders are sold in pairs because they use a proprietary 4 wire interconnection protocol. They need to operate in pairs - one for each end.

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.

Are regular or opto-isolated converters needed?

SerialComm offers both regular and opto-isolated RS232/RS485/RS485 repeaters. 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/RS485/RS422 repeater 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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