ept GmbH elektronische Präzisionstechnik . Bergwerkstr. 50 . 86971 Peiting, Germany . Tel +49 (0) 88 61/25 01 0 . Fax +49 (0) 88 61/55 07 . [email protected] ept . Rechtsform / Legal Form: GmbH . Sitz der Gesellschaft / Registered Office: Peiting, Germany . Registergericht / Register Court: AG München (Munich), HRB 151797 . Geschäftsführer /
Managing Director: Bernhard Guglhör, Thomas Guglhör
ept Test Report – intermateability COM Express
Test No.: 138 10 April 2013 samples under test: COM Express “Colibri” plug and receptacle connectors
Task: test and evidence of intermateability of ept “Colibri” connectors with the Tyco and Foxconn products Tests performed: mechanical:
mating and withdrawal forces, mating cycles, cross sections of contact area electrical: contact resistance, high frequency (HF) properties
Result: The intermateability of the ept COM Express “Colibri” connectors is very good in combination with all tested other manufacturers.
approved by: Date: Signature: Michael Spranger 10 Apr 2013 Director R&D
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CONTENTS: 1. Summary ........................................................................................................................... 3
2. General information .............................................................................................................. 4
2.1. Test samples .............................................................................................................. 4
2.2. Test facility ................................................................................................................. 5
2.3. Time schedule ............................................................................................................ 5
2.4. Participants ................................................................................................................ 5
2.5. Measuring equipment................................................................................................. 6
3. Test description and results .............................................................................................. 7
3.1. mechanical intermateability ........................................................................................ 7
3.1.1. mating and withdrawal forces ............................................................................... 7
3.1.2. mating cycles ........................................................................................................ 9
3.1.3. cross sections of contact area ............................................................................ 10
3.2. electrical intermateability .......................................................................................... 13
3.2.1. contact resistance ............................................................................................... 13
3.2.2. high frequency (HF) properties ........................................................................... 15
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1. Summary COM Express Plug and Receptacle connectors of ept, Tyco and Foxconn were tested for this report. Mechanical intermateability: All combinations of connectors showed similar mating and withdrawal forces. The combinations with ept Receptacle connectors showed the lowest mating force in combination with equal withdrawal forces compared with the other pairs of connectors. 30 mating cycles were performed without damage with all combinations of connectors. Sections of the mating area showed a good mating/fitting of the signal and ground pins between Plug and Receptacle connectors in all combinations. Electrical intermateability: The contact resistance of all combinations was within the same range of values. The high frequency (HF) tests showed a significant better performance of combinations with ept receptacle connector at high data rate than for the other combinations.
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2. General information
2.1. Test samples
3 pairs of COM Express connectors were tested regarding intermateability. The following connectors were tested: a) ept COM Express “Colibri”
ept Plug
ept Receptacle b) TYCO COM Express “0.5 Free Height”
Tyco Plug
Tyco Receptacle
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c) FOXCONN “QT00” and “QT01” Series
Foxconn Plug
Foxconn Receptacle
2.2. Test facility
The measurements were carried out in the Quality Management Department (QM) at ept GmbH Bergwerkstrasse 50 86971 Peiting, Germany The high frequency (HF) tests were carried out at the Fraunhofer IZM institute in Berlin.
2.3. Time schedule
Start of test: Jan 2013 End of test: Apr 2013
2.4. Participants
name function phone e-mail
Dipl.-Ing. Matthias Wildschütte
testing and editor +498861-2501-170 [email protected]
Ann-Kathrin Essich testing +498861-2501-169 [email protected]
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2.5. Measuring equipment
ID No. equipment type manufacturer status2
last cal.
next cal.
P 20005 universal testing machine
Test Control Zwick cal 07/12 07/13
P 40009 digital multimeter Model 2750 Keithley cal 09/11 05/15
stereo microscope DMLB Leica cnn - -
status
2
cal: calibration car: calibration restricted use chk: check chr: check restricted use cpu: check prior to use cnn: calibration not necessary ind: for indication only
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3. Test description and results
3.1. mechanical intermateability
All connectors were assembled to the same type of PCB using reflow technology prior to the tests.
3.1.1. mating and withdrawal forces
All pairs of connectors could be mated without any collision or damage. The following mating and withdrawal forces were measured with a “Zwick” testing machine: initial forces Plug ept ept Tyco Tyco ept Foxconn Foxconn
Receptacle ept Tyco ept Tyco Foxconn ept Foxconn
mating force [N] 78 144 66 109 118 98 90
withdrawal force [N] 53 46 43 37 48 52 32
0
20
40
60
80
100
120
140
160
ept ept Tyco Tyco ept Foxconn Foxconn
ept Tyco ept Tyco Foxconn ept Foxconn
forc
e [
N]
initial mating and withdrawal forces
mating force [N]
withdrawal force [N]
Receptacle
Plug
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Plug ept vs. Receptacle ept Plug Tyco vs. Receptacle ept
Plug ept vs. Receptacle Tyco Plug Tyco vs. Receptacle Tyco
Plug Foxconn vs. Receptacle ept Plug ept vs. Receptacle Foxconn
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Plug Foxconn vs. Receptacle Foxconn
3.1.2. mating cycles
The two parts of each specimen pair, the receptacle and the plug, were mated and withdrawn 30 times. These mating cycles were performed with a force displacement testing machine. The first 5 cycles were performed with 25 mm/min for the initial force-displacement charts. For the other 25 cycles the mating and withdrawing speed was set to 600 mm/min. To ensure a proper measuring a fixed/floating bearing was used to position both parts of the connector specimen.
30 mating cycles were performed with each pair. The following table shows the initial and maximum mating and withdrawal forces of the 30 mating cycles: initial and maximum forces during 30 mating cycles Plug ept ept Tyco Tyco ept Foxconn Foxconn
Receptacle ept Tyco ept Tyco Foxconn ept Foxconn
mating force initial [N]
78 144 66 109 118 98 90
withdrawal force initial [N]
53 46 43 37 48 52 32
mating force maximum [N]
83 158 76 121 126 101 98
withdrawal force maximum [N]
68 69 68 48 64 63 44
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3.1.3. cross sections of contact area
Cross sections of all pairs were done to show how mating looks like inside the mated connectors. The cross sections show the area where Plug and Receptacle are in electrical contact.
0
20
40
60
80
100
120
140
160
ept ept Tyco Tyco ept Foxconn Foxconn
ept Tyco ept Tyco Foxconn ept Foxconn
forc
e [
N]
mating and withdrawal forces: initial and maximum over 30 mating cycles
mating force initial [N]
withdrawal force initial [N]
mating force maximum [N]
withdrawal force maximum [N]
Plug
Receptacle
section area and view direction in the following pictures
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Plug ept vs. Receptacle ept
Plug Tyco vs. Receptacle ept
Plug ept vs. Receptacle Tyco
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Plug Foxconn vs. Receptacle ept
Plug ept vs. Foxconn Receptacle
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3.2. electrical intermateability
3.2.1. contact resistance
The contact resistance of the signal contacts was measured as shown in the sketch:
The resistance was measured using “Kelvin-technique” (LLCR). Each combination of connectors 10 of the 220 ways were measured. Plug ept ept Tyco Tyco ept
Receptacle ept Tyco ept Tyco Foxconn
average [mOhm] 17,63 25,1 13,83 22,86 27,59
min [mOhm] 16,5 23,1 12,6 22 26,5
max [mOhm] 20 27,7 14,5 23,4 29,1
Plug connector
Receptacle connector
µV mA
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the black bars on top of the columns show the range between minimum and maximum value
The combinations Plug Foxconn vs. Receptacle ept and Plug Foxconn vs. Receptacle Foxconn could not be measured because there were not enough sample connectors available for testing.
0
5
10
15
20
25
30
35
ept Tyco ept Tyco Foxconn
ept ept Tyco Tyco ept
[mO
hm
]
contact resistance
average
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3.2.2. high frequency (HF) properties
The high frequency (HF) tests were done at Fraunhofer IZM institute in Berlin. A complete test report is available (Charakterisierung EPT COM-Express Stecker Colibri_04.07.2012.pdf). This report here shows only extracts of the original Fraunhofer report.
The following pages show the “eye-diagrams” of all connector pairs. These “eye-diagrams” were processed from single ended measurements of the connector pairs. The first chart explains the parameters of an “eye-diagram”:
The next pages show the “eye-diagrams” of connector pairs:
Statistical distribution of bits in the area 40% - 60% of the eye width
statistical scatter
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ept Plug mated with different Receptacle connectors
ept Plug mated with different Receptacle connectors
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ept Plug mated with different Receptacle connectors
ept Receptacle mated with different Plug connectors
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ept Receptacle mated with different Plug connectors
ept Receptacle mated with different Plug connectors
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Plug and Receptacle connector of the same manufacturer mated with each other
Plug and Receptacle connector of the same manufacturer mated with each other
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Plug and Receptacle connector of the same manufacturer mated with each other
