Hi:
A few tips on Power Poles.
1. Super Flex wire works very well. It's typically made of of 44 AWG strands. For PCB mounting a single strand can be
used for mechanical rigidity.
2. There's no rule that all the current has to be carried by a single terminal
The M455-1 power supply uses many pins in parallel on the 24 Volt 50 Amp output Amphenol connector where 7 and 8 pins
are wired in parallel rather than use a connector with a couple of pins rated at 50 or more Amps.
http://www.prc68.com/I/M4551.shtml
3. Note the "24 Volt" version of the Power Pole connector.
--
Have Fun,
Brooke Clarke
http://www.PRC68.com
http://www.end2partygovernment.com/2012Issues.html
-------- Original Message --------
Bob,
look to this spec. data from Amphenol found @ Mouser as example:
Current Rating:
power Contacts: 55 Amperes (per contact)
Signal Contacts: 5 Amperes (per contact)
Contact Resistance:
Power Contacts: .25 milliohms max
Signal Contacts: 20 milliohms max
Insulation Resistance: 5000 Megohms
DWV: 1500V DC
Operating Temperature: -40°C to +105°C
http://www.mouser.com/ds/2/18/LCC17_BRO-44772.pdf
ok, for shure more expensive (LCC17-A3W3SM-2N0,
<http://www.mouser.de/ProductDetail/Amphenol-Commercial-Products/LCC17-A3W3SM-2N0/?qs=sGAEpiMZZMv3qGlUeJulRG8yb3Pdn%252bYMJfJuKobi5wY%3d>
$ 9.45 per con. one side, solder connection)
http://www.mouser.com/ds/2/276/Mixed_Layout-472362.pdf e.g. for crimped contacts
Not of interest?
But sorry, even being very interesting, I think we should not stress too much the term 'time' in this discussion here
;-) .
kind regards
Arnold, DK2WT
Am 23.06.2017 um 01:33 schrieb Bob kb8tq:
Hi
You can get and use PP’s at 30 to 50A in a 12V circuit without frying them or
the cable they are
attached to. Doing the same with a “Cannon” connector is not at all easy ….You
can also bump up
to the larger PP’s and get into a couple of hundred amps.
Bob
On Jun 22, 2017, at 6:54 PM, Arnold Tibus <[email protected]> wrote:
Hello,
I can second Magnus and want to throw in some more details.
Cannon, Deutsch, Bendix, Souriau, Matrix, Amphenol, etc. etc. are (big)
companies manufacturing all kind of connectors and are n o t connector
type designations! Important are the type numbers of the manufacturer or
higher level specification numbers.
We used in the aircraft and spacecraft business naturally the military
(MS-) numbers listed in the MIL-QPL (or eg. for Spacelab with GSFC spec.
no). Most types of connectors are under these numbers available from
different manufacturers, of course with different manufacturer in house
part numbers. Attention: the 'same' connectors may be bought w/o the
Mil.-spec. sheets with somewhat lesser quality. Important details are
the max. mating number, the contact resistance (e.g. 20 mOhm) and the
max. continuous current, max. Voltage, vibration resistance and
reliability etc. Of course, this makes good connectors somewhat
'expensive'. Hirel and non-magnetic gold plated D- subminiture type
connectors do survive e.g. the rocket launch phase (high vibrations),
vacuum and low temperatures and are still used for space projects.
The D-sub series of connectors was introduced by Cannon in 1952. They
are still available as standard, hirel, and non-magnetic versions. The
contacts were machined contacts forcrimping or soldering connection and
made of massive copper with gold finish. (more see e.g.
https://en.wikipedia.org/wiki/D-subminiature). Example for the standard
9 pin connector designation (crimp): DEMAM-9S and DEMAM-9P. Today are a
big number of companies producing equivalent types. Cheap ones are
equipped with contacts made of sheetmetal. Nobody should expect then the
same spec. values as reliability, mating numbers, contact power rating etc.
It is up to the designer of a product to be informed and select the
right quality device for his product ...
I hope I could enlight a bit the connector selection and nomenclature point.
regards, 73
Arnold, DK2WT
Am 22.06.2017 um 21:10 schrieb Magnus Danielson:
Hi,
The second connect has been called "Cannon" and XLR, and is not
generally recogniced as XLR, which is the product range name.
Naming of the first connector as "Cannon" is at least for me and many
others confusing. This is a good example how vendor name for a
connector type is not a good thing. The first connector is a circular
MIL-STD connector (don't remember the correct notation), and this is a
product available from ITT Cannon as well as AMP.
Cheers,
Magnus
On 06/22/2017 08:42 PM, Mark Spencer wrote:
Sorry if I have caused any un due confusion thru my perhaps incorrect
use of the terms "cannon" and "XLR."
The green connector with 4 separate female contacts is what I
perhaps in correctly referred to as a "cannon" connector. The silver
connector with 3 separate female contacts was what I perhaps
incorrectly referred to as a "XLR" connector.
Both were in use in my lab powering time nuts gear.
Mark Spencer
[email protected]
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