Re: Adding Envisalink EVL4 - Auxillary Power Max'ed out?

[Jim Davis <alarminex@xxxxxxx>]

On Saturday, November 24, 2018 at 5:31:06 PM UTC-5, jtm...@xxxxxxxxxxx wrot=
e:
> On Friday, November 23, 2018 at 9:48:57 AM UTC-8, Jim Davis wrote:
> > On Thursday, November 22, 2018 at 3:32:14 AM UTC-5, JohnM wrote:
> > > I plan on purchasing an EVL4 shortly but have a question regarding Au=
xiliary Power Maximums. I have a Vista 20P control panel with the below aux=
iliary devices which have a total current draw of 535ma (as stated in the 2=
0P installation manual). Adding a EVL4 at 75ma would bring the total Auxili=
ary Power draw to 610ma. The Vista 20P documentation states that the Auxili=
ary Terminal power available is 600ma . This is a residential (non-UL rated=
) installation.
> > >=20
> > > I think I can make the assumption that the Alpha Keypads would only r=
each 100ma maximum if the keypad sonalert and the panel backlighting LED li=
ghts are activated at the same time. If that is the case I hoping that the =
extra 10ma overage would only be reached in a worst case scenario.
> > >=20
> > > I'm trying to save having to deal with a second auxiliary power suppl=
y and its associated power transformer but want to insure that I'll still b=
e able to access the panel remotely in that worst case scenario.
> > >=20
> > > Does anyone have a comment on what I should do here? Thanks for your =
help in advance.
> > >=20
> > > Current Devices
> > > (2) 6160 Alpha Keypads (100ma each - total 200ma)
> > > (1) 5881 RF Receiver (35ma)
> > > (1) 4286 Phone Module (300ma)
> >=20
> > Your car can do over 100 miles an hour.=20
> >=20
> > If you could do it lawfully, would you actually drive it that fast ever=
ywhere you went? Think about it. And why wouldn't you? Maybe because it wou=
ldn't last as long =E2=80=A6=E2=80=A6 huh? Maybe? Ya think?
> >=20
> > Put in a aux power supply =E2=80=A6=E2=80=A6=E2=80=A6. Jeeeeeeze!
>=20
> Thanks for the advice....my issue was to try and squeak by with just the =
one power supply. =20
>=20
> As I'm sure you must know that you can't use the same transformer to powe=
r both the main alarm panel and the aux power supply.  Therefore adding an =
aux power supply will require me to do additional electrical work to add an=
other AC outlet for the second oversized 1361 transformer.  Also it require=
s purchasing an additional battery to provide the necessary backup power in=
 the event of a rare power outage because as you must know, Honeywell state=
s you can't connect both to a single battery. All of this would likely requ=
ire an additional secure box so that all this additional hardware wasn't re=
adily accessible. =20
>=20
> So as you can see, this simple task has just turned into something a lot =
more complex for the sake of a measly 10ma of additional current required b=
y the hardware.
>=20
> But if for nothing else I learned something about driving my car over a 1=
00.  I never thought it wouldn't last as long.  My first thought is I'd hav=
e to wear "Depends" if I did go that fast.
>=20
> Have a great day and please keep on posting for the benefit of all.

You can use the 4 Amp hour battery and the larger 40VA plug-in transformer =
as Rocky suggest as a common source or just use a power strip or one of tho=
se multi-plug expanders to gain another outlet to plug the second transform=
er into. You can use tie wrap/cable ties / zip ties to strap the transforme=
r so it doesn't fall out of the outlet plug.=20

As Rocky said =E2=80=A6=E2=80=A6 Don't forget to run a common wire between =
the negative terminal of the power supply and the negative terminal of the =
alarm control panel auxiliary power output.=20

And OH Yeah!  Wearing Depends is for sissies !