Please let me know the type (pair/unpair, twisted/untwisted, shield/unshield, high/low voltage) and size (16, 18, 20, 22 or 24 AWG) of cable wiring that I need to purchase to connect RS-485 and digital inputs from variable speed pump to automation controller. Thanks for your help.
RS-485 and Digital Inputs Cable Wiring Type and Size
- Thread starter Hien Nguyen
- Start date
- Jul 21, 2013
- 52,907
- Pool Size
- 35000
- Surface
- Plaster
- Chlorine
- Salt Water Generator
- SWG Type
- Pentair Intellichlor IC-60
- Jul 21, 2013
- 52,907
- Pool Size
- 35000
- Surface
- Plaster
- Chlorine
- Salt Water Generator
- SWG Type
- Pentair Intellichlor IC-60
Use a length of cat5 cable if you have it. 18-24 awg wire, shielding or twist doesn’t matter. It is a low speed protocol and not sensitive to cabling.
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You can buy a real rs-485 cable (it is shielded):
4-Twisted Pairs of Wire, CAT5e RS-485 Shielded, Stranded PVC Cable (FTP), 50 feet: Electrical Equipment: Amazon.com: Tools & Home Improvement
4-Twisted Pairs of Wire, CAT5e RS-485 Shielded, Stranded PVC Cable (FTP), 50 feet: Electrical Equipment: Amazon.com: Tools & Home Improvement
www.amazon.com
Or you can get away with a Cat5/6 network cable (using only one pair for D+/D-). Its impedance is slightly lower than that of rs-485, but at a couple hundred feet it may not matter.
Not sure what connectors are used, though, on both ends. Screw terminals ?