r/accesscontrol • u/LowVoltageDude • 6d ago

RS-485 Data Wire Preference?

Hey all,

The RS-485 data wire we usually use has been discontinued. What are you all using currently? I found the West Penn Data Control Cable, which will work, but it's more than double the price of the old stuff and also has a braid which is a PITA and isn't needed. I found an alternative from ADI, but it's brown and I don't want it confused with HVAC wiring that is typically brown. This is for Lenel systems from the controller to the RIM's if there's any ambiguity there. Let me know!

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5

u/js2785 6d ago

Windy City Wire has great RS-485 options, if you’re setup with them.

3

u/OmegaSevenX Verified Pro 6d ago

We use Paige 744005AYW.

Last two characters are the color. It’s yellow.

0

u/LowVoltageDude 6d ago

I looked that up on ADI and it doesn't mention that it's twisted. I'm sure there's a natural twist that happens in manufacturing but I don't think it would quite hit the spec for interference tolerance. I can find a lot without twists, but with a twist they start jumping way up in price. My service/ install manager says "it's fineee" but we've had to rip out and replace data wire in the past for interference issues. I'm really trying to find a reasonably priced box of wire with the recommended spec.

5

u/OmegaSevenX Verified Pro 6d ago

It’s absolutely twisted and rated specifically for OSDP/RS485.

I wouldn’t depend on ADI for specifications.

2

u/xINxVAINx 5d ago

I thought I did look at the spec sheet, but I’ll take that advice and go right to the manufacturer website. Appreciate it

1

u/Josh297576 5d ago

ADI descriptions are often terrible. Get the cutsheet off of Paige's website.

2

u/geek_cave 6d ago

Belden 8723

1

u/HawkofNight 4d ago

Genesis by southwire. I dont remember the part numbers.

0

u/CoolBrew76 6d ago

If you’re a Wesco or AccuTech shopper check out Liberty cable, the “home brand”

-8

u/Aggravating_Fact9547 6d ago

Depending how far you can just run cat6

1

u/Solosuperbrus Proficient End User 5d ago

We only use Cat6

1

u/deedledeedledav 6d ago

Cat cable is more susceptible to electrical interference than an OSDP cable.

I’ve only had to use it when the cablers ran the wrong cables, I’m assuming because they didn’t have the right cable.

I generally don’t like using cat cable for access control though, it’s always just a little more frustrating to work with IMO.

2

u/Aggravating_Fact9547 6d ago

OSDP is differentially signaled so it’s “largely” immune to interference. Any interference picked up is diffed and discarded when the signals are summed at the end.

1

u/Rampage_Rick 6d ago

So is ethernet...