www.ERNI.com/contact/ Catalog E XXXXXX 01/05 Edition 1
1
ERNI
Pre-Alignment Modules
Provides reliable connection, coding and grounding of plug-in cards
ERNI has developed a solution to the dilemma posed by high
pin-count hard-metric (HM) connectors and the need for preci-
sion connector mating combined with sufficient play between
subrack guide rails and printed-circuit board (PCB) cards. The
answer is ERNI’s pre-alignment module.
According to the IEC 61076-4-101 standard, a 2mm HM con-
nector may have hundreds of contacts. At the same time, the
plug-in board connectors and backplane connectors must mate
precisely in order to avoid damage. On the other hand, there
must be play between the cards and rails to avoid compression
stress on the PCB.
ERNI’s pre-alignment module consists of solid metal guides
and new guiding systems that offer several optional functions.
For example, there is a kit available with an integrated socket
for HM “coding” keys. Thus no coding on the connector side is
needed, which offers more room for signal contacts. In addition,
there are flattened pre-alignment pins designed to match their
mating connector counterparts. Using an octagonal pattern, it
will support eight additional coding options.
A further reasonable additional option is the electrical contact
model. Shielding is low restistant because of gold plating,
and therefore allows electric current to flow with 40A at 20°C
through a large diameter. A corresponding derating curve is
available. This large pin diameter enables a wide capture range
of >2mm. The PCB is adequately centred and guided as a
result of the appropriate length.
The pre-alignment pin with fastening thread is fastened on the
backplane and is available for PCB thicknesses of 2.5 to 6mm,
and 6 to 8mm. The guide bush is mounted on the daughter
card with an M4 or M5 screw. The PCB thickness for the
daughter card can be 1.6 to 3.5mm, or 3.5 to 5.5mm.
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Applications
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Pre-alignment Modules with Electrical Contact
Guide Bush
Dimensional Drawing
3,4 15,4
28,4
20,25
7,8
3,4 3,9
10,5
9,8
2,34 10,6
6,5
Gewindetiefe 7
depth of thread
(ø4,5 for M4)
backplane
70,1
14 0,05
3-0,2
3,1 0,03
5,5 for M5
0,1
15,4
0,2
9,8 +0,2
19 +0,5
daughtercard
0,1
Layout
Ordering Informations
Description Part Number
Guide bush with thread M4 144641
Kit (Guide bush M4, screw M4x8 with thread locker) 164307
Kit M5 on request.
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Guiding Pin Gold Plated
Dimensional Drawing
C
5
4,2
4M
B
R0,5
R1
D
E
A
6
7,5
G
F
1) unter 3.2mm zusätzlich Unterlegscheibe verwenden.
up to 3.2mm use washer additional.
7.2
7.2
6.5
6.5
1.2
3
22.2
24
13.8
12
6 - 8
6 - 8
Ident-Nr. AB
9.7 24
144768
C
3
144741 11.5 22.2 1.2
Backplanestärke
2.5- 6
2.5- 6
thickness of backplane
Part-No. D
144742
144769
E
6.3
1.5
3.3
1)
1)
FG
1.8
1.8
ø6
ø6
4.5
8,5 0,05
10,5 0,2
4,3 0,03
2,5 0,05
Bauteilseite
4,3 0,03
10,5 0,2
Bauteilseite
144741
144742
component side
daughtercard
Tochterkarte
component side
daughtercard
144768
144769
Tochterkarte
Layout
Ordering Informations
Description PCB Thickness Part Number
Guiding pin to fit on backplane without base plate 2.5 - 6.0mm 144768
Guiding pin to fit on backplane without base plate 6.0 - 8.0mm 144769
Guiding pin use only with base plate 2.5 - 6.0mm 144741
Guiding pin use only with base plate 6.0 - 8.0mm 144742
Kit without base plate (Guiding pin, washer, nut M4) 2.5 - 6.0mm 214361
Kit without base plate (Guiding pin, washer, nut M4) 6.0 - 8.0mm 214362
Kit with base plate (Guiding pin, washer, nut M4, base plate) 2.5 - 6.0mm 214363
Kit with base plate (Guiding pin, washer, nut M4, base plate) 6.0 - 8.0mm 214364
Base plate 134734
Base Plate
3
3
2,4
8,5
8
18,45
9,8
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Pre-alignment Modules without Electrical Contact
Guide Bush
Dimensional Drawing
10,5
3,2 15,4
7,8
9,8
18
9,8
Gewindebohrung 4,5 tief
thread drilling 4,5 deep
(ø4,5 for M4)
backplane
70,1
14 0,05
3-0,2
3,1 0,03
5,5 for M5
0,1
15,4
0,2
9,8 +0,2
19 +0,5
daughtercard
0,1
Layout
Ordering Informations
Description Part Number
Guide bush with thread M4 154058
Guide bush with thread M5 134726
Kit for PCB thickness 1.5 - 2.0mm (Guide bush M5, screw M5x6, washer) 144127
Kit for PCB thickness 2.0 - 4.5mm (Guide bush M5, screw M5x8, washer) 144128
Kit M4 on request.
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Guiding Pin
Dimensional Drawing
C
5
4,2
4M
B
R0,5
R1
D
E
A
6
7,5
G
F
1) unter 3.2mm zusätzlich Unterlegscheibe verwenden.
up to 3.2mm use washer additional.
7.2
7.2
6.5
6.5
1.2
3
22.2
24
13.8
12
6 - 8
6 - 8
Ident-Nr. AB
9.7 24
134733
C
3
134732 11.5 22.2 1.2
Backplanestärke
2.5- 6
2.5- 6
thickness of backplanePart-No. D
144077
144078
E
6.3
1.5
3.3
1)
1)
FG
1.8
1.8
ø6
ø6
4.5
8,5 0,05
10,5 0,2
4,3 0,03
2,5 0,05
Bauteilseite
4,3
0,03
10,5 0,2
Bauteilseite
144077
134732
component side
daughtercard
Tochterkarte
component side
daughtercard
144078
134733
Tochterkarte
Layout
Ordering Informations
Description PCB Thickness Part Number
Guiding pin to fit on backplane without base plate 2.5 - 6.0mm 134733
Guiding pin to fit on backplane without base plate 6.0 - 8.0mm 144078
Guiding pin use only with base plate 2.5 - 6.0mm 134732
Guiding pin use only with base plate 6.0 - 8.0mm 144077
Kit without base plate (Guiding pin, washer, nut M4) 2.5 - 6.0mm 144370
Kit without base plate (Guiding pin, washer, nut M4) 6.0 - 8.0mm 144371
Kit with base plate (Guiding pin, washer, nut M4, base plate) 2.5 - 6.0mm 144131
Kit with base plate (Guiding pin, washer, nut M4, base plate) 6.0 - 8.0mm 144132
Base plate 134734
Additional versions upon request.
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Pre-alignment Modules with Coding
Guide Bush
Dimensional Drawing
AA
9,8
9,8
18
7,8
10,5
3,2 15,4
Gewindebohrung M5; 4,5 tief
thread drilling M5; 4,5 deep
(ø4,5 for M4)
backplane
70,1
14 0,05
3-0,2
3,1 0,03
0,1
15,4
0,2
9,8 +0,2
19 +0,5
daughtercard
0,1
5,5 for M5
Layout
Ordering Informations
Description Component Part Number Kit1) Part Number
Guide bush with coding 0°/360° 194548 204399
Guide bush with coding 45° 194547 204398
Guide bush with coding 90° 194546 204397
Guide bush with coding 135° 194553 204404
Guide bush with coding 180° 194552 204403
Guide bush with coding 225° 194551 204402
Guide bush with coding 270° 194550 204401
Guide bush with coding 315° 194549 204400
1) Kit with screw M5x6 and washer.
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Guiding Pin
Dimensional Drawing
7,5
4
4M
4,2
5
A 24
6,5
Ordering Informations
Description Part Number
Guiding pin 194543
Base plate 194542
Kit (Guiding pin, base plate, washer, nut M4) 204395
8,5
8
18,45
9,8
2,4
3
3
Base Plate
Tochterkarte
2,5 +0,05
0,03
8,5 0,05
10,5 0,2
Bauteilseite
component side
daughtercard
Layout
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Pre-alignment Modules Inverse
Pin with Guide Bush
Dimensional Drawing
50,6
34,6
21
1
9,8
18
3,2 15,4
9,8
deep
M5; Tiefe/ 4.5
70,1
14 0,05
3
-0,2
3,1 0,03
5,5
Layout
Ordering Informations
Description Part Number
Kit (Pin with guide bush) 204219
Piece parts on request.
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Coding Keys
Coding Key Color Part Number
Pastel Orange
RAL 2003
Fincke 00233197
043342
Steel Blue
RAL 5011
Fincke 00251197
043343
Slate Gray
RAL 7015
Fincke 00235197
043344
Cadmium Yellow
RAL 1021
Fincke 00252197
043345
Reseda Green
RAL 6011
Fincke 00237197
043346
Brilliant Blue
RAL 5007
Fincke 00245197
043347
Blue/Lilac
RAL 4005
Fincke 00246197
043348
Ocher Yellow
RAL 1024
Fincke 00313197
043349
Strawberry Red
RAL 3018
Fincke 00312197
043350
Hazel
RAL 8011
Fincke 00272197
043351
Coding Key Color Part Number
Pastel Orange
RAL 2003
Fincke 00233197
043332
Steel Blue
RAL 5011
Fincke 00251197
043333
Slate Gray
RAL 7015
Fincke 00235197
043334
Cadmium Yellow
RAL 1021
Fincke 00252197
043335
Reseda Green
RAL 6011
Fincke 00237197
043336
Brilliant Blue
RAL 5007
Fincke 00245197
043337
Blue/Lilac
RAL 4005
Fincke 00246197
043338
Ocher Yellow
RAL 1024
Fincke 00313197
043339
Strawberry Red
RAL 3018
Fincke 00312197
043340
Hazel
RAL 8011
Fincke 00272197
043341
Coding Keys for Base Plate Coding Keys for Guide Bush
Printed in Germany · Subject to modification without prior notice.