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Cables & Connectivity

Serial and Console Cables

Cables and adapters that connect a computer’s USB port to serial and legacy equipment: USB to RS232 DB9 adapters, DB9 serial cables, RJ45 console cables for network devices, and USB to parallel printer cables. The deciding points are the connector and gender at the device end, the adapter chipset (Prolific PL2303 or FTDI) for driver support, and the cable length.

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How to choose a USB to RS232 cable

Serial work is unforgiving of small mismatches, so check these points before ordering:

  • Connector type: DB9 RS232 suits most industrial, POS and GPS devices, while an RJ45 console cable is for the console port on Cisco and similar routers, switches and firewalls.
  • Chipset: Prolific PL2303 and FTDI chipsets both have mature drivers for Windows, Mac and Linux. Confirm driver support for your operating system before you head out to a site.
  • Gender: DB9 extension, male-to-male and female-to-female cables each solve a different port pairing, so look at the device port before choosing.
  • Length: RS232 is a low-speed signal, so a 1.5m to 3m serial cable comfortably reaches a rack or a POS counter.

For older printers with a parallel port, the USB to IEEE1284 and DB25 adapters in this range handle the conversion. If your device connects over Ethernet instead, look at network adapters or browse all cables and connectivity products.

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