Plug-in boards used in today’s computing platforms must provide higher reliability,
greater functionality and require more power than ever before.
Many next genera-
tion platforms deliver bulk voltage to boards. DC to DC converters are used to sup-
ply the various voltage requirements on the board. This allows systems to adapt as
semiconductor voltages change.
The
VPB Series
was developed as a
dedicated interface
between backplanes
and boards.
The connector is capable of providing dual redundant power, system
management and high voltage auxiliary circuits to each slot within the platform. The
connector’s outstanding blind mating capability can be used to align the board dur-
ing insertion. The
VPB Series
is
compliant to PICMG 3.0, AdvancedTCA
®
, Zone 1
connector requirements.
www.picmg.com
www.advancedtca.com
PICMG and the PICMG logo and/or Advanced TCA
®
and the Advanced TCA
®
logo are registered
trademarks of the PCI Industrial Computers Manufacturers Group
Visit our
web site
for
the latest
catalog
updates
and
supplements
at
http://www.connectpositronic.com/catalogs/updates.html
Positronic Industries’
FEDERAL SUPPLY CODE
(Cage Code)
FOR MANUFACTURERS is
28198
POSITRONIC
®
IS AN ITAR REGISTERED COMPANY
Products described within this catalog may be
protected by one or more of the following U.S. patents:
#4,900,261
#6,260,268
#5,255,580
#6,835,079
#5,329,697
#7,115,002
Information in this catalog is proprietary to Positronic and
its subsidiaries. Positronic believes the data contained
herein to be reliable. Since the technical information is
given free of charge, the user employs such information at
his own discretion and risk. Positronic Industries assumes
no responsibility for results obtained or damages incurred
from use of such information in whole or in part.
Positronic
®
, Positronic Industries, Inc.
®
, P+ logo, Positronic
Global Connector Solutions
®
, Connector Excellence
®
and
their logo designs are registered trademarks of Positronic
Industries, Inc.
Blue colored connectors shown in this catalog are a
trademark of Positronic Industries, Inc.
®
, registered in
the U.S. Patent and Trademark Office.
Patented in Canada, 1992
Other Patents Pending
About the cover:
For more information about the products shown on the front cover, visit the following web sites:
•
Rittal
backplane (top left) http://www.rittal-corp.com
•
Diversified Technology, Inc
ATS1160 (middle left) http://www.dtims.com
•
F9 Systems, Inc.
AdvancedTCA Thermal Blade™ (bottom left) http://www.f9-systems.com
•
GE Fanuc Embedded Systems
AT4-AMC-1 carrier blade (bottom left) http://www.gefanucembedded.com
www.connectp o sit ronic. c om
DIMENSIONS ARE IN MILLIMETERS [INCHES].
ALL DIMENSIONS ARE SUBJECT TO CHANGE.
3
“SIZZLE
FAULT”
A high resistance short
between a front board’s
overcurrent
and
the
overcurrent
protection
backplane’s
protection
Front board
(relatively low)
overcurrent protection
Backplane
(relatively high)
overcurrent protection
FRONT BOARD
BACKPLANE
ZONE 1
CONNECTORS
could allow high currents
to be drawn through the
Zone 1 Power Connector
indefinitely. These cur-
rents could reach a value
that is slightly less than
the overcurrent protec-
tion for the entire back-
plane.
High resistance
“sizzle fault” short
Zone 1 backplane connectors must survive sizzle fault
conditions when tested per PICMG 3.0, R3.0, Section B.4.2.4.
• Conditions: IEC 60512-3, Test 10d
• The mated set of connectors (specimens) shall be comprised of a Front Board connector with
right angle (90°) press-in terminations and a backplane connector having press-in terminations
• Standard atmospheric conditions
• Ambient temperature shall be 55 degrees C
• Contact positions 28 and 33 shall be energized at 10 amperes through a circuit path sized to
simulate a standard PICMG 3.0 frontboard/backplane
• Contact positions 29 and 34 shall be energized at 50 amperes through a circuit path sized to
simulate a standard PICMG 3.0 frontboard/backplane
• There shall be a one hour stabilization time after test set up
• Test time shall be four hours after one hour stabilization period
• After completion of test, connectors shall be immediately uncoupled
• Requirements after test conditioning:
•
Visual inspection of backplane connector shall show no defect that would impair normal operation
• After backplane connectors are allowed to cool to room ambient temperature the connectors
shall be mated to fresh Front Board connectors that have right angle (90°) press-in termina-
tions. The mated connector sets shall pass the test requirements of B.4.2.2; B.4.2.3; B.4.2.4;
B.4.2.5; and B.4.3.2.
A high resistance short between a front board’s overcurrent protection and the
backplane’s overcurrent protection could allow high currents to be drawn through
the Zone 1 Power Connector indefinitely. These currents could reach a value that
is slightly less than the overcurrent protection for the entire backplane.
Positronic’s VPB series meets the requirements of this test!
4
DIMENSIONS ARE IN MILLIMETERS [INCHES].
ALL DIMENSIONS ARE SUBJECT TO CHANGE.
w ww .c o n n e c t p o s it r o n i c . co m
VPB
FEATURES
P o si troni c ’s
B l ue
C o n n e c to rs a re
G re en
Energy
is essential to everyone. Often we do not give
thought to where
energy
comes from or how much we
consume until
energy
is not readily available.
Once the assessment is made, the assessor issues a
statement that will aid power connector users in evaluating
contact efficiency as it relates to
energy
consumption. As
an example, the Positronic VPB series size 16-power
Energy
has become an area of focus for governments,
contacts recently underwent evaluation. The contact
private industry, and citizens. Enhanced methods of
resistance was found to be less than one milliohm
producing
energy
from traditional sources, development
each. This low contact resistance is achieved by use
of new
energy
sources and conservation
of high conductivity contact materials.
of
energy
from all sources have become
In addition,
Positronic’s
Large Surface
more crucial than ever before.
Area (LSA) contact system is utilized
Across the world, the electronic
as the interface between male and
equipment that we all rely upon in our
female power contacts in VPB series
Average power contact
daily lives consumes a vast amount of
connectors.
resistance is less than 0.001
energy.
An unavoidable waste of
energy
The VPB series was designed
ohms
occurs when power is distributed
for use as the Zone 1 power
Average signal contact
throughout electronic equipment.
connector in AdvancedTCA (ATCA)
resistance is less than 0.005
As electrical current flows through
telecommunication computing systems.
ohms
conductors and connectors, unwanted
Zone 1 connectors provide power from
RoHS compliant
heat is generated in proportion to
backplanes to front boards in ATCA
the amount of electrical resistance
chassis. The low contact resistance
encountered.
of
Positronic’s
VPB series provides
Lowering resistance in connector contacts and conductors
energy
savings opportunities in any application using this
will reduce the amount of heat generated, and result in connector.
less wasted
energy.
Additional
energy
will be saved, as
The following formula verifies the
energy
savings
cooling systems will have less heat to draw out of the
of a lower resistance contact at a given current:
equipment.
Power Consumption (Watts) = Current Flow2 (Amperes2)
FEATURES
In the past, the primary metric for power connectors
has been contact current ratings. In the future, contact
resistance may become equally important. While it is
true that contact resistance and contact current ratings
are closely associated, contact current ratings cannot be
used to quantify the
energy
consumed by contacts.
Current ratings are based on the temperature rise of
a connector or contact at a specific current level. A
connector design or test method allowing relatively rapid
heat dissipation may yield a reasonable temperature rise,
while a relatively high amount of
energy
is still being wasted.
Within the connector industry, there are a variety of
test methods used to quantify a particular performance
metric. Different test methods can yield different values
for the same metric. This lack of uniformity can be
confusing to connector users who are trying to compare
connectors offered by various manufacturers. Third party
assessment can give connector users a common point of
reference when making connector choices.
Assessors use contact resistance as the metric to
determine the relative efficiency of connector contacts.
These assessments verify the claims made by
manufacturers.
www.connectp o sit ronic. c om
X Contact Resistance (Ohms).
Contact resistance has a
one-to-one effect on power consumption. If, the contact
resistance is reduced by half, the power consumption is
reduced by half.
Low resistance power contacts also provide benefits in
systems sensitive to voltage drop. This is demonstrated
in the following formula:
Voltage drop across contact
pairs = Current Flow (Amperes) X Contact Resistance
(Ohms).
Once again, contact resistance has a one-to-one
effect. Reducing the contact resistance by half reduces
voltage drop by half.
Higher
energy
costs and government legislation will
cause
energy
conservation efforts to continue to
intensify. If we consider the vast numbers of power
contacts in electronic equipment around the world, it
is clear how lower contact resistance can play a role in
meeting
energy
conservation goals.
Positronic
utilizes
high conductivity contact materials and unique contact
interfaces to provide low contact resistance in our power
connector products. To learn more about these products,
visit
connectpositronic.com.
DIMENSIONS ARE IN MILLIMETERS [INCHES].
ALL DIMENSIONS ARE SUBJECT TO CHANGE.
5
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