Re: wiegand data interference

[Silicon Sam <siliconsam@xxxxxxxxx>]

On Jan 5, 8:48=A0am, "Dave White" <renofus...@xxxxxxx> wrote:
> "Silicon Sam" <silicon...@xxxxxxxxx> wrote in message
>
> news:68e986e5-a56d-4fd3-93f3-d0770ef5fcb7@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
> On Jan 4, 3:57 pm, "Dave White" <renofus...@xxxxxxx> wrote:
>
> > "Silicon Sam" <silicon...@xxxxxxxxx> wrote in message
>
> >news:73bdfce8-8353-4ba1-b417-a1c9285163c6@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxx=
.
> > On Dec 31, 2:24 pm, "Dave White" <renofus...@xxxxxxx> wrote:
>
> > > I am having issues with a card reader in my elevator not sending wieg=
and
> > > data to my controller. all voltages are good at the reader. think it =
may
> > > be
> > > interference causing problems.
> > > will a wiegand extender fix this issue?
>
> > Have you tried pull-up resistors at the panel end on the data lines
> > 0 and 1 yet?
> > nope, what value of resistor? is it manufacturer specific?
>
> =A0 I was just going by one install I did where 12 of the 36 readers
> would not read a card correctly and they all happened to be the
> readers that were farthest away. =A0Our tech guru at our office said to
> put some pull up resistors between the power and Data 0 and power and
> Data 1 lines at the panel. =A0Every reader was working after that.
>
> =A0 I just happen to be going by the site tomorrow morning for remodel
> work, I'll look at the resistor value. =A0It's been 3 years since I did
> it. =A0It is a Lenel system with the Indala readers.
>
> =A0 Gonna say it's either 1K or 4.7K resistors. =A0I'll look when I get
> there and post tomorrow.
>
> cool, I am going to my site today, will try out some different resistor
> values

  Went by today, it was 4.7K resistors.