What type of cable is suitable for an RS-485 interface?

1545 pts.
Tags:
cable
Cabling
CAT 5
CAT 6
Category 5 cable
Category 6 cable
Networking
This is a serial specification and as such is going to be dependent partially on electronics.  Cat 6 is better balanced than Ccat 5, and I am a big fan of shielded systems for a variety of reasons.  I would suggest, however, that you discuss this with the active supplier.  Cabling is backwards- compatible so the higher category of cable you install the more future- proofed you are as in it won't have to be replaced.  If you need to send over the active specs, I can have a further look.

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There is some quite useful information, and a link to a specific forum for RS-485 at
www.lammertbies.nl/comm/info/RS-485.html

The last time I used this, we ran it over standard Cat5 and it was fine, with close tolorance 100ohm terminating resistors, but you may want to consider shielded cat 5 if the area is prone to strong interference.

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  • AfzalOvvarakkal
    Can I use Cat 6 instead of RS485 and which of the pairs to be connected with the same?
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  • Subhendu Sen
    @AfzalOvvarakkal, yes, you can use cat6 for your networking purpose. This is basically a unshielded twisted pair and very commonly used over RS485. However this depends on industry type/ environment and of course of money. You may come back with more info for getting good replies.
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  • AfzalOvvarakkal
    Thank you @Subhendu Sen for the info.
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