nuckolls.bob(at)cox.net
Guest
|
 Posted: Tue Dec 18, 2007 4:38 am Post subject: P-Mag wiring |
 |
|
At 03:52 PM 12/17/2007 -0500, you wrote:
| Quote: | Hi Bob,
I have wired the "P-Mag" system per your older drawings. With
the new Z-13/8 drawings ver. 12/10/07 you have simplified the wiring. I
think what has happened is I have "lost" the ability to check the self
power check that was in the old switching.
|
No. Note that I've recommended that E-Mag power up from
the battery bus. This is in keeping with the philosophy of
running electrically dependent engine systems from an always
hot source.
The P-Mag runs from a switched bus. This means that you can
easily do a test of the P-Mag's internal alternator by
powering down the bus at some time after the engine is
running. Which (of course) won't effect the engine because
E-dependent systems are wired to the battery bus and you're
running the independent system from a switched bus for the
purposes of demonstrating independence.
This test need not be run often . . . certainly not as
a routine pre-flight test.
Not further that both products come up in the maintenance
mode without being active (p-lead grounded) as soon as
the switched bus is up for the P-Mag and as soon as the
switch is moved to BAT for the E-Mag.
This wiring change retains all the utility to the
owner/operator, reduces number of switches and covers
all versions of software that might be running loose
in the wild.
| Quote: | Is it because Brad and crew
need the 12 power applied first and keep it applied until you loose the
main bus? Then the self powered function takes over? Is it because
there might be a temporary loss of power while it is still running that
might scramble the timing? Just trying to figure out the why's. Right
now my power comes from the battery bus which is "good" until the battery
goes TU. I'm just a bit confused. I think I will go into the bus at
some place and pick up some power and change over the switches. Bummer
as I have closed up the cowling and I will have to get on my back under
the panel. Oh well, if I have done it right, I will be able to do it
with minimal grunting and skinned fingers.
|
If your present Emagair products have the updated
software, it's my understanding that the switching
published earlier is okay. You don't need to change
anything. The changes currently published were done
to simplify the wiring and operation (one fewer switch)
and wire in a manner that would not cause the owner
of an older system to experience the loss of timing
issue with the old software.
Bob . . .
----------------------------------------)
( . . . a long habit of not thinking )
( a thing wrong, gives it a superficial )
( appearance of being right . . . )
( )
( -Thomas Paine 1776- )
----------------------------------------
| | - The Matronics AeroElectric-List Email Forum - | | | Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:
http://www.matronics.com/Navigator?AeroElectric-List |
|
|
|
Get Email Distribution Too!
FAQ
Search
Memberlist
Usergroups
Register
Profile
Log in to check your private messages
Log in
