Maximum cable lengths
Welcome to CWAnswers
CWAnswers is your guide to the sprawling world wide web. The directory aims to provide a useful guide made by users. You can share your knowledge as well - simply sign up and edit your first entry. For questions just contact the team at support - at - cwanswers.com.
Weblinks for Serial Cable
Top 10 for Serial Cable
Things about Serial Cable you find nowhere else.
Select content modules
Dave Mast " Blog Archive " RadioShack USB-to-Serial cable fix
I've got a USB-to-Serial cable that I bought from Radio Shack that allows me to ... I have used the serial cable fine with my Xp laptop, Still some times that when ...davemast.net/2007/03/02/radioshack-usb-to-serial-cable-fix/CablesAndKits.com " Blog Archive " My laptop has no DB9 serial port!
... equipment is configured using a serial console cable (usually the 72-3383 ... cable) but most new laptops (and even workstations) no longer have a DB9 ...www.cablesandkits.com/blog/2008/12/my-laptop-has-no-db9-seri...Make: Online : Getting Meggies to talk to each other
The cable can also be used to provide a serial connection between any two... Recent Posts from the Craft: Blog. Flower Ruffle Collar Tutorial. Customizable ...blog.makezine.com/archive/2009/01/getting_meggies_to_talk_to...MAKE: Blog: HOW TO - Make a PS2 Serial Cable
... made a serial port for ... Blog. Make Magazine. Videos/Podcasts. Projects. Forum ... building your own serial cable that connects directly to the PS2's ...blog.makezine.com/archive/2006/02/how_to_make_a_ps2_serial_c...SENA Replaces Serial Cables with Promi-SD Bluetooth Serial Adapter ...
... serial adapter product line designed to replace RS-232 serial cables with ... home : : contact : : embedded : : fpga : : eda blog : : free journals : : jobs ...edageek.com/2006/04/06/replaces-serial-cables-with-promi-sd-...
Maximum cable lengths
The maximum working length of a cable varies depending on the characteristics of the serial port transmitters and receivers, the bit rate on the cable, and the capacitance and resistance of the cable. The RS 232 standard states that a compliant port must provide defined signal characteristics for a capacitive load of 2500 pF. This does not correspond to a fixed length of cable since varying cables have different characteristics. Empirically tested combinations of bit rate,serial ports, cable type, and lengths may provide reliable communications, but generally RS 232-compatible ports are intended to be connected by at the most a few tens of metres (yards) of cable. Other serial communications standards are better adapted to drive hundreds or thousands of metres of cable.
Construction of a serial cable
RS-232 cables may be built with D-subminature connectors or other forms depending on the application. The number of wires used depends on the subset of RS-232 circuits required. The cables may be between 3 and 25 conductors; often 4 or 6 wires are used. Flat RJ (phone-style) cables may be used with special RJ-RS232 connectors. Cables are often unshielded, although shielding cables may reduce electrical noise radiated by the cable.
For configuring and diagnosing problems with RS-232 cables, a "breakout box" may be used. This device normally has a female and male RS-232 connector and is meant to attach in-line; it then has lights for each pin and provisions for interconnecting pins in different configurations.
Serial-connected peripherals often use non-standard connectors and the manufacturers will supply their own proprietary cables for connecting the device to a standard DE-9M connector on a PC. Many such devices such as the Garmin eTrex and other GPS receivers use a 3-pin serial interface but have additional pins on the device itself for connecting to an external power supply. These pins either branch off from the serial cable to the power supply or can be used with a purpose built power cable.
See also
- Direct cable connection
- InterLnk
- LapLink cable (can be seen as a parallel equivalent to a serial null modem cable)
- Legacy port
- Network bridge
References
ja:シリアルケーブル
