RS232 Repeater

If you need to extend a RS232 connection for more than the recommended maximum 50 feet (15 meter) limit then you can use these RS232 extenders to increase the range up to 4000 feet (1219 meter).

These extenders work in pairs only, one is connected at each end of the RS232 line you wish to extend. They communicate in bi-directional full-duplex (meaning they can send and receive at the same time) and converts the connected RS232 signal into RS422 and back again to RS232.

These extenders are suitable for most applications, including industrial, commercial and any general office computer device, however notice that these extenders are not isolated so if you require isolation then we recommend using a RS232 isolator in combination with these extenders. They are a cost-effective and effective way of extending a standard RS232 line.

The extenders are powered from the RS232 port so no external power supply, flow control, drivers or any other external interference is needed, simply plug-and-play. Alternatively they can be powered from an external power supply.

These extenders must be used in pairs only, one unit at each end of your data line, so in order to establish a communication link you will need to order two units.

Each RS232 extender has a standard DB9 female connector on one side and a DB9 male connector on the other side, which allows for easy connection of and standard serial cable. Terminal headers for connecting individual wires are also included with each extender.

Optional: by using a DB9 to RJ45 adapter you can extend any serial RS232 signal using a standard CAT5 cable.

Application example with CAT 5 cable:


Application example with 4-wire serial cable:

Useful optional accessories (not included)

Null modem adapter

DB9 - RJ45 adapter

Gender Changer

5V Power supply

For alternative serial solutions please see our full selection of serial converters and isolators.