DB2-074P(700) 查看數據表（PDF） - Amphenol Aerospace
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DB2-074P(700) Datasheet PDF : 44 Pages
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Low Mating Force Connector Accessories
polarization keys
General information follows on this page and the next three pages
for assembling connector accessories with Amphenol® Low
Mating Force B3 Brush Contact Connectors.* Provided are
suggestions for proper connector installation that will help to
maintain connector straightness after equipment assembly.
Low mating force connector bodies are intentionally designed to
be non-rigid to facilitate application variables such as compliance
to printed circuit boards, fixtures and card cages, vibration and
shock exposure, thermal excursions and differential expansion
characteristics. Users may employ installation procedures that
will provide mating surface straightness of these non-rigid bodies
within 0.010 inch to ensure maximum connector performance.
Generally, no external board support structures are required with
B3 brush contact connectors as long as the mounting surface
offers sufficient rigidity. However, longer installations should
consider external support to prevent excessive flexing of the
connector/printed circuit board assembly.
POLARIZATION KEYS
Polarization Keys, 10-285422-2 are accessory items, ordered
separately for MB, DB, IO and PC Series Low Mating Force
Connectors. If used, 4 keys are required per connector half. See
page 5 for ordering information.
Examples at right show key locations for mating connector
halves. The number or letter designations on all mating
connectors are arranged so that the projecting keys on one
relate to the same numbers or letters on the other. With the
numbers or letters matching, the connector will mate.
TYPICAL CODE SEQUENCE
B, H –1, 5
4 Different possibilities
at each position = 256
CONNECTOR ACCESSORIES THAT ARE USED WITH B3
BRUSH CONNECTORS INCLUDE:
• Locking screws for I/O connector mounting to board
• Locking/mounting bushings:
• for PC connector mounting to board or mating to I/O
connector
• for MB connector mounting to board or mating to I/O
connector
• Polarization keys for each style connector provide up to
256 different key locations for alternate keying
• Test Probe kits for ensuring that contacts are properly
wired within a connector and to prevent damage to brush
contacts during probing.
For How to Order Accessories see page 5.
B3 brush PC style connectors are shipped with PC tail combs
that not only protect the tails during shipment, but aid the
person assembling the connectors to boards to align the
contacts.
Refer to page 2 of this catalog for illustration of the connector
styles and how they mate.
K
E
Y
KEY
KEY
K
E
Y
Key Locations 1 – 5
Mates with
Key Locations 1 – 5
Key Locations B – H
Mates with
Key Locations B – H
KEY LOCATIONS
MOTHER BOARD OR PC CONNECTORS
DAUGHTER BOARD CONNECTOR
WITH POLARIZATION KEYS
* Installation Instructions for B3 Low Mating Force Connectors had
formerly been covered in publication L-1220. This has been discontin-
ued and all installation instructions are covered here on pages 24-29.
7
6
8
5 KEY
4K
E
3 Y1
2
G
HK
F
E
Y
E
D
A KEY C
B
Designates Interior
Key Positions
Flat side of Key is Positioned
next to the Letter or Number
Designation
KEY LOCATIONS
DAUGHTER BOARD OR INPUT/OUTPUT CONNECTORS
24
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