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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 precision 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 connector 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.
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.
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
1
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Catalog E XXXXXX
01/05
Edition 1
Applications
2
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Catalog E XXXXXX
01/05
Edition 1
Pre-alignment Modules with Electrical Contact
Guide Bush
Dimensional Drawing
3,4
15,4
7,8
10,5
20,25
3,9
28,4
Layout
9,8
3,4
Gewindetiefe 7
depth of thread
backplane
10,6
9,8
3 -0,2
15,4
0,2
2,34
+0,2
for M5
0,1
19
0,05
+0,5
0,1
(ø4,5
5,5
for M4)
14
7
0,1
6,5
3,1
0,03
daughtercard
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.
3
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Catalog E XXXXXX
01/05
Edition 1
Guiding Pin Gold Plated
Dimensional Drawing
B
6-8
4.5
13.8 22.2
1.2
6.5
6.3
144768
9.7
3
7.2
1.5
144741
11.5 22.2
1.2
7.2
3.3
1.8
ø6
C
D
E
F
G
Ident-Nr.
A
Part-No.
24
B
1.8
ø6
6-8
2.5- 6
1)
2.5- 6
1)
Tochterkarte
daughtercard
Backplanestärke
thickness of backplane
1) unter 3.2mm zusätzlich Unterlegscheibe verwenden.
144741
up to 3.2mm use washer additional.
Base Plate
18,45
2,4
Bauteilseite
9,8
8,5
4,3
144742
0,03
0,2
6.5
10,5
3
0,05
144742
24
0,05
12
2,5
144769
Bauteilseite
F
8,5
R1
,5
0,03
0,2
R0
C
4,3
144768
144769
10,5
7,5
G
5
M4
4,2
Layout
6
D
component side
E
component side
A
Tochterkarte
daughtercard
3
8
3
Ordering Informations
Description
PCB Thickness
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
4
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Part Number
Catalog E XXXXXX
01/05
Edition 1
Pre-alignment Modules without Electrical Contact
Guide Bush
Dimensional Drawing
15,4
3,2
10,5
7,8
Layout
Gewindebohrung 4,5 tief
thread drilling 4,5 deep
9,8
+0,2
19
0,05
14
for M5
for M4)
0,1
0,1
(ø4,5
5,5
+0,5
7
9,8
9,8
0,1
15,4
18
3 -0,2
0,2
backplane
3,1
0,03
daughtercard
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.
5
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Catalog E XXXXXX
01/16
Edition 1a
Guiding Pin
Dimensional Drawing
A
B
E
7,5
G
5
M4
134733
9.7
3
7.2
1.5
134732
11.5 22.2
1.2
7.2
3.3
1.8
ø6
C
D
E
F
G
Ident-Nr.
Part-No.
A
24
B
1.8
ø6
6-8
0,2
Tochterkarte
2.5- 6
1)
2.5- 6
1)
daughtercard
Backplanestärke
144077
thickness of backplane
4,3
134732
1) unter 3.2mm zusätzlich Unterlegscheibe verwenden.
Bauteilseite
up to 3.2mm use washer additional.
0,03
0,2
6.3
10,5
6.5
0,05
1.2
8,5
13.8 22.2
0,05
4.5
2,5
6.5
10,5
6-8
3
component side
144077
24
component side
R1
,5
F
12
0,03
R0
C
144078
4,3
144078
134733
Bauteilseite
4,2
Layout
6
D
Tochterkarte
daughtercard
Ordering Informations
Description
PCB Thickness
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.
6
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Part Number
Catalog E XXXXXX
01/05
Edition 1
Pre-alignment Modules with Coding
Guide Bush
Dimensional Drawing
Layout
backplane
A
9,8
+0,2
for M5
19
0,1
0,1
5,5
3,1
0,03
daughtercard
9,8
7,8
(ø4,5
18
for M4)
thread drilling M5; 4,5 deep
9,8
0,05
14
Gewindebohrung M5; 4,5 tief
+0,5
7
0,1
3 -0,2
15,4
0,2
15,4
3,2
10,5
A
Ordering Informations
Description
1)
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
Kit with screw M5x6 and washer.
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Catalog E XXXXXX
01/05
Edition 1
Guiding Pin
Dimensional Drawing
Layout
24
0,05
0,2
8,5
10,5
2,5
Bauteilseite
5
M4
4,2
0,03
+0,05
4,3
4
component side
A
7,5
6,5
Tochterkarte
daughtercard
Base Plate
8,5
8
2,4
18,45
9,8
3
3
Ordering Informations
Description
Part Number
Guiding pin
194543
Base plate
194542
Kit (Guiding pin, base plate, washer, nut M4)
204395
8
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Catalog E XXXXXX
01/05
Edition 1
Pre-alignment Modules Inverse
Pin with Guide Bush
Dimensional Drawing
21
1
3,2
15,4
9,8
34,6
M5; Tiefe/
deep 4.5
50,6
0,05
14
5,5
7
9,8
0,1
3 -0,2
Layout
18
3,1
0,03
Ordering Informations
Description
Part Number
Kit (Pin with guide bush)
204219
Piece parts on request.
9
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Catalog E XXXXXX
01/05
Edition 1
Coding Keys
Coding Key
Color
Coding Keys for Guide Bush
Part Number
Coding Key
Color
Part Number
Pastel Orange
RAL 2003
Fincke 00233197
043342
Pastel Orange
RAL 2003
Fincke 00233197
043332
Steel Blue
RAL 5011
Fincke 00251197
043343
Steel Blue
RAL 5011
Fincke 00251197
043333
Slate Gray
RAL 7015
Fincke 00235197
043344
Slate Gray
RAL 7015
Fincke 00235197
043334
Cadmium Yellow
RAL 1021
Fincke 00252197
043345
Cadmium Yellow
RAL 1021
Fincke 00252197
043335
Reseda Green
RAL 6011
Fincke 00237197
043346
Reseda Green
RAL 6011
Fincke 00237197
043336
Brilliant Blue
RAL 5007
Fincke 00245197
043347
Brilliant Blue
RAL 5007
Fincke 00245197
043337
Blue/Lilac
RAL 4005
Fincke 00246197
043348
Blue/Lilac
RAL 4005
Fincke 00246197
043338
Ocher Yellow
RAL 1024
Fincke 00313197
043349
Ocher Yellow
RAL 1024
Fincke 00313197
043339
Strawberry Red
RAL 3018
Fincke 00312197
043350
Strawberry Red
RAL 3018
Fincke 00312197
043340
Hazel
RAL 8011
Fincke 00272197
043351
Hazel
RAL 8011
Fincke 00272197
043341
10
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Catalog E XXXXXX
01/05
Edition 1
Printed in Germany · Subject to modification without prior notice.
Coding Keys for Base Plate
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