RS232 Repeater

The recommended maximum length for RS232 cables is 50 feet. These RS232 repeaters / RS232 extenders, also called line drivers, can extend your standard RS232 line up to 4000 feet.

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 particular RS232 repeaters / RS232 extenders are suitable for most applications, including industrial, commercial and any general office computer device. They are a cost-effective and effective way of extending a standard RS232 line.

The extenders are (in most cases) powered from the RS232 port so no external power supply, flow control, drivers or any other external interference is needed.

These extenders are 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 Repeater / 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. Optional 6-screw terminal headers for connecting individual wires are also available (not included).
These repeaters are powered from the RS232 port, however only if your particular RS232 port can provide sufficient power to the repeater. If your RS232 port cannot provide sufficient power then these repeaters needs to be powered externally by a 5 to 12VDC supply through the screw terminals.

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.