TB-2054
DESIGN GUIDE FOR CONNECTOR POLARIZING AND GUIDANCE SYSTEMS
REVISION “-”
SPECIFICATION REVISION STATUS
Revision
“-”
SCR No.
Description
Initial
Date
26414
Initial Release (Supercedes TB-212)
H. Cook
12-18-98
Copyright @ 2001 by Amphenol Backplane Systems. The material contained in this document is proprietary to
Amphenol Backplane Systems. It may not be disclosed to third parties in any form or by any means, electronic,
mechanical, photocopying, or recording without the prior written permission of Amphenol Backplane Systems.
TB-2054
1.0
REVISION “-”
DESIGN GUIDE FOR CONNECTOR
POLARIZING AND GUIDANCE SYSTEMS
PAGE NO. 2 OF 10
SCOPE
1.1
This technical bulletin describes available polarizing pins, keys, guide pins, and mating guide
bushings.
2.0
PROCEDURE
2.1
The polarizing and guidance systems described in this technical bulletin are primarily for male
blade and tuning fork connector systems but may be used with other product lines.
2.2
A proven method of polarizing and guidance is the “SEM” (Standard Electronic Module) or
otherwise known as the “NAFI” (Naval Avionics Facility, Indianapolis) System. The polarizing
and/or guide pins are provided in the male blade connector and the mating polarizing keys and/or
guide bushings are provided in the female tuning fork connector backplane.
2.3
Another popular polarizing method is to provide a polarizing post on the backplane and a
clearance slot in the PC daughterboard.
2.4
3.0
The backplane material may be aluminum or PC board where applicable.
APPLICABLE CONNECTOR SERIES
Aluminum Backplane
Aluminum Header
PC Backplane
3.1
S1000
S1001
S1200
S1201
S1500
M1001
KS1000
S1501
M1000
M1200
M1500
M1201
For information on any of the above connector series, please consult our Sales or Engineering Staff
for desired data sheets.
3.2
This document is intended to serve as a guide in the selection and specification of components to
meet your requirements. Amphenol Engineering drawings take precedence over dimensions
specified herein and must be referred to when specific dimensions, tolerances, materials and
finishes are required.
TB-2054
REVISION “-”
DESIGN GUIDE FOR CONNECTOR
POLARIZING AND GUIDANCE SYSTEMS
PAGE NO. 3 OF 10
Typical Male Blade Connector Assembly and Female Tuning Fork Connector Pattern
PC Daughterboard
Series M1001
Series KS1000
For Use With
PC Backplane
Polarizing Pin
See Note Below
Polarizing Key
PC Backplane
Series S1000
For Use With Aluminum Backplane
Aluminum Backplane
Polarizing Pins - Material: Stainless Steel
.075
(1.91)
.017
(0.43)
.278
(7.06)
.100 Dia.
(2.54)
.405
(10.29)
.125
(3.18)
.02 (.51) x 45º (.79) Rad.
Chamfer Typical
.050
(1.27)
.100
(2.54)
Part No. 564-0023-000 (Standard)
Mounting Hole: .096 Diameter x .140 Deep
Polarizing Keys - Material: Polycarbonate
.050
(1.27)
.410
(10.41)
45º (.79 Rad)
45º
(.79 Rad)
.192
(4.88)
.144
(3.98)
.160
(4.06)
Figure 1
.14 (3.55) Dia.
X .06 (1.52)
Deep FS
.118
.093
(2.99)
(2.36)
Figure 2
Figure 3
(Otherwise Same as Figure 1)
2.35
(5.97)
Spherical
Radius
.040
(1.02)
Part No. 564-0041-000
Mounting Hole: .096 Diameter x .140 Deep
.090 (2.28)
.090
(2.29)
Straight Knurl
Typical
.103 Dia.
(2.62)
.315
(8.00)
.078
(1.98)
Part No. 564-0001-000
Mounting Hole: .096 Diameter x .110 Deep
Part No.
Fig
Type
Nav
Mating
Ord No.
Polarizing Pin
516-0005-001
1
“D” 2648706-2
564-0023-000
516-0006-001
2
“V” 2648706-1
564-0041-000
516-0023-001
3
“O” 2648706-3
564-0001-000
516-0010-001
4
“D” 2300799-2
564-0023-000
516-0011-001
5
“V” 2300799-1
564-0041-000
516-0026-001
6
“O” 2300799-3
564-0044-000
45º (.79 Rad)
.192
(4.88)
.144
(3.98)
NOTE:
To increase the “polarizing feel” when engaging
connectors which should not mate (especially those with
large numbers of contacts), special stainless steel keys are
available.
45º
(.79 Rad)
.160
(4.06)
Figure 4
.118
.072
(2.99)
(1.83)
Figure 5
Figure 6
(Otherwise Same as Figure 4)
Type “D” - Part No. 516-0035-000 - Figure 4
Type “V” - Part No. 516-0036-000 - Figure 5
The polarizing keys shown are designed to be installed into the appropriate insulator shown in the above pictorial. These keys may be used when
contacts are on .100 x .100 grid. The dimension from the centerline of the last contact to the centerline of the polarizing pin/key is to be .150. A
.142 diameter clearance hole must be provided in the backplane for the protruding polarizing pin.
TB-2054
REVISION “-”
3.3
DESIGN GUIDE FOR CONNECTOR
POLARIZING AND GUIDANCE SYSTEMS
PAGE NO. 4 OF 10
If a tighter tolerance is required when mating the male blade connector and the female tuning fork
connector, the polarizing pin shown is available. This pin is larger in diameter than the standard
pin (Part No. 516-0023-000).
.270
.080
.100 Dia
.225
.134 Dia
.385
Polarizing Pin
Part No. 564-0031-000
Material: Cres 416
Mounting Hole: .096 Diameter x .130 Deep
3.4
The suggested method of designating this polarizing system is as shown. The pin and key are
indexed in one of eight positions. This construction will yield 64 positions for a given connector
using two polarizing pins. For more positive alignment, it is recommended that pin and key be
indexed in four positions (90° increments).
A
H
A
B
G
C
F
E
D
Polarizing Pin
Mate Blade Connector
Mating View
A
C
E
C
B
A
H
C
E
G
D
E
F
Polarizing Pin
Connector Backplane
Mating View
TB-2054
3.5
REVISION “-”
DESIGN GUIDE FOR CONNECTOR
POLARIZING AND GUIDANCE SYSTEMS
PAGE NO. 5 OF 10
When a skirted header body is used for the male blade connector, clearance must be provided as
shown for the width of the insulator in which the polarizing key is installed. See technical bulletin
M1001, KS1000 and S1000 for additional data.
.080
.010 Maximum
.010 Minimum
.020R Maximum
.050 Minimum
.285
.200
.150
3.6
When polarization is required on connectors having a contact grid of .125 x .125, .150 x .150, or
staggered .100 centers, the following system may be used:
Polarizing Pin
Part No. 536-0014-000
Polarizing Key
Part No. 516-0018-000
Aluminum Backplane
NOTE: This polarization system is presently designed for connectors using an aluminum
backplane only.
TB-2054
REVISION “-”
DESIGN GUIDE FOR CONNECTOR
POLARIZING AND GUIDANCE SYSTEMS
PAGE NO. 6 OF 10
199
Typ
.134 Dia.
.095 Dia.
.080
Mounting Hole
.058
.230
.383
.121
Dia.
.253
Dia.
.119
.503
Polarizing Pin
Part No. 536-0012-000
Material: Cres 416
Mounting Hole: .091 Diameter x .140 Deep
3.7
.203
A.F.
Octagon
Polarizing Key
Part No. 516-0018-000
Material: Polymide (Nylon)
The dimension from the centerline of the last contact to the centerline of the polarizing pin/key is
to be .200.
.200
.200
TB-2054
3.8
REVISION “-”
DESIGN GUIDE FOR CONNECTOR
POLARIZING AND GUIDANCE SYSTEMS
PAGE NO. 7 OF 10
Alternate methods of providing an effective polarizing system are illustrated.
PC Daughterboard
Module
Contact/Insulator
Aluminum Backplane
Polarizing Pin
Clearance Area Must Be Provided
PC Board or
on PC Backplanes
Aluminum Backplane
3.9
A polarizing post is provided on the backplane adjacent to the connector. A typical design is to
install a press fit polarizing pin as shown. An alternate method of polarizing is to use the same
tuning fork contact and insulator as is used for the connector pattern. The polarizing pin method
may be used for an aluminum or PC board backplane. The contact/insulator method is
recommended to be used on aluminum backplanes only.
3.10
Polarization of the daughterboard module is obtained by providing a clearance slot in the PC board
which allows the proper module to mate with the appropriate backplane connector.
TB-2054
REVISION “-”
DESIGN GUIDE FOR CONNECTOR
POLARIZING AND GUIDANCE SYSTEMS
Part No.
Typical Polarizing Pins
PAGE NO. 8 OF 10
Dim. A
Dim. B
Dim. C
Dim. D
564-0009-505
.095
.205
.115
.076
564-0014-505
.100
.190
.090
.075
Material: Aluminum 2025-T4
C
B
A
D
3.11
Finish: Gold Chromate
Mounting Hole: .074 Diameter x .130 Deep
This illustration shows a typical design for the guidance of connectors using Amphenol’s standard
hardware.
Guide Pin
Guide Bushing
(Bonded in PC Backplanes)
Backplane
Clearance Area Must Be Provided
on PC Backplanes
NOTE: This guidance system may be used with either aluminum or PC board backplanes.
.075 Dia.
60º
.131 Dia.
.210
.181 Dia.
.187
.090
.375
Guide Pin
Part No. 564-0010-505
Material: Aluminum 2024-T4
Finish: Gold Chromate
Mounting Hole: .074 Diameter x .110 Deep
.147 Dia.
.100
.187
Guide Bushing
Part No. 516-0019-505
Material: Aluminum 2024-T4
Finish: Gold Chromate
Mounting Hole: .175 Diameter Thru
TB-2054
3.12
REVISION “-”
DESIGN GUIDE FOR CONNECTOR
POLARIZING AND GUIDANCE SYSTEMS
PAGE NO. 9 OF 10
The dimension from the centerline of the last contact to the centerline of the guide pin/bushing is
to be .150 minimum for contacts on .100 x .100 grids.
.150 Minimum
3.13
.150 Minimum
Typical guide pin/bushing system.
60º
.081
Dia.
.123
Dia.
.330
.13
Guide Pin
Part No. 564-0030-000
Material: Cres 303
Mounting Hole: .077 Diameter x .150 Deep
.136
Dia.
A
Dia.
.188
Dia.
.225
.100
Guide Bushing
Part No. 516-0025-000 - Dia. A = .225
Part No. 516-0077-000 - Dia. A - .200
Material: Cres 303
Mounting Hole: .183 Diameter Thru
TB-2054
3.14
REVISION “-”
DESIGN GUIDE FOR CONNECTOR
POLARIZING AND GUIDANCE SYSTEMS
PAGE NO. 10 OF 10
The dimension from the centerline of the last contact to the centerline of the guide pin/bushing is
to be .200.
.200
.200