Published by pchipkin March 27th, 2008
in BACnet MSTP, Cables and RS485.
All cables offer impedance (resistance). Some cables are designed so that the impedance is relatively independent of distance. You want one of these cables. A clue to knowing if you selected one is to look at the cable’s Nominal Impedance. If they quote a number such a 100Ohms you have a good cable. If they […]
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Published by pchipkin March 19th, 2008
in BACnet MSTP and Cables.
Practically speaking you can go up to 4000 feet (1200m) at baud rates up to 76800 baud. Above that you need to do a little math and reduce the length. For example, at 115k baud your cable should not be much longer than 2500 feet.
However, the higher the baud rate the more sensitive the cable is […]
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Published by pchipkin June 4th, 2007
in Cables and Ethernet.
Where do the terms Cat5 and Cat5e come from ?
TIA Telecommunications Industry Association, TIA defined standard TIA-568-B which defines the cables and structured or modular cabling systems and termination standards for building and telecom cabling systems.
Cat5 and Cat5e Cable – What is the difference?
Very simply put – The 5e cable is tested to a higher […]
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