Archive for the 'Cables' Category

BACnet MSTP (RS485), Cable selection does make a difference.

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 […]

Did you like this post?

Subscribe To The RSS Feed!
To catch many more articles like this in the future, make it easy on yourself and subscribe to me via RSS. You will not regret it!

Do you have a question?
We will do our best to try and solve any building automation, protocol, integration problem you may have

Cable Lengths and Baud Rates for RS485 or BACnet MSTP

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 […]

Did you like this post?

Subscribe To The RSS Feed!
To catch many more articles like this in the future, make it easy on yourself and subscribe to me via RSS. You will not regret it!

Do you have a question?
We will do our best to try and solve any building automation, protocol, integration problem you may have

Ethernet Cables

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 […]

Did you like this post?

Subscribe To The RSS Feed!
To catch many more articles like this in the future, make it easy on yourself and subscribe to me via RSS. You will not regret it!

Do you have a question?
We will do our best to try and solve any building automation, protocol, integration problem you may have