Re: ademco 4219 question

["Crash Gordon" <webmaster@xxxxxxxxxxxxxxxxxxxxx>]

I would if I thought 75 feet would cause enough of a voltage drop...don't
think it will...and all thats gonna be running out there is kp, 4219, 1
mandoor, 1 ohd, and a pir.


"Frank Olson" <feolson@xxxxxxxxxx> wrote in message
news:IjnLe.204746$5V4.74112@xxxxxxxxxxx
>
> "Robert L Bass" <sales@xxxxxxxxxxxxxxxxxxxxx> wrote in message
> news:j4brf11b3m6fm2518lfb2i4rm2qvd1mef6@xxxxxxxxxx
>>> I would recommend an independant power supply
>>> for the remotely mounted zone expander, due to
>>> the length of the wire run and the load of the
>>> keypad and devices on the expander.
>>
>> If you do that, be sure nothing in the remote part of the system
>> is earth grounded.  Otherwise, the first lightning ground strike
>> in the area may take out your alarm system.
>
>
> And don't forget to common the negative terminals
>