CrystalLink Serial

Serial Extender over CATx

Product Picture
  • Extend RS232 serial device up to 1,000 feet away over CATx
  • Supports baud rates up to 115,200
  • RS-232D standards compatible
  • One CAT5e cable for serial data and power to the remote unit


CrystalLink Serial is an inexpensive and compact unit that extends the distance of any compatible serial device up to 1,000 feet from your PC over a single CAT5e cable. Baud rates up to 115,200 are supported. Once plugged in to a power source, the local transmitter unit also powers the remote unit over the CAT5e cable.

CrystalLink Serial is easy to install by simply plugging the transmitter unit into a PC via the DB9 port and connecting the power adapter. Plug in the receiver unit into the serial device with the DB9 port using the included DB9 male-to-male null modem cable if required. Connect the two units with a CAT5e cable. No additional configuration or setup is required, making CrystalLink Serial an excellent tool for any situation in which a serial device needs to be located at a substantial distance from a computer.


Dimensions (W x D x H) 1.42" x 3.75" x 0.98" (36 x 95 x 25 mm)
Weight 0.14 lb (0.06 kg)
Power 100-240 VAC 50-60Hz One external adapter, +9V DC, 300ma, 2.7WReceiver powered by transmitter
Serial Maximum baud rate: 115,200 baud
Distance Up to 1000' (300m)
Connectors Transmitter:RS232: DB9FLink: RJ45 jackPower: Barrel jackReceiver:RS232: DB9FLink: RJ45 jack
Environment Operating temperature: 32°F–122°F (0°C–50°C)Storage temperature: -4°F–158°F (-20°C–70°C)Relative humidity: 20%–80%, non-condensing


Product Part Number Description
CLK-SLDTPD9 Serial extender complete kit. transmitter, receiver, and power adapter


Datasheet • CrystalLink Serial PDF
Manual • CrystalLink Serial • Installation and Operation PDF