D-Subminiature connectors with
metal face and EMI/RFI shield
Th e Pr oblem:
Stray Electromagnetic Interference
(EMI) and Radio Frequency
Interference (RFI) emitted from
unshielded cables, connectors, and
assemblies can affect the performance
of electronic devices within the range
of these emissions. The Federal
Communications Commission requires
EMI/RFI shielding to standards defined
in F.C.C. Docket 20780, Part 15 on all
newly manufactured equipment.
Connectors, cable, and assemblies, if
an integral part of this equipment, are
within the scope of the F.C.C. decree
and must be appropriately shielded.
Test Results
Radiated Emission Comparison
Unshielded vs. CW Shielded D-Subminiatures Assemblies
Th e CW Solution :
CW makes available a choice of two
solutions. Select the system that best
solves your EMI/RFI emission problem.
METAL-FACED D-SUBMINIATURE–
A metal face forms the front of your D-
Subminiature connector and shields
high-frequency radiation that eminates
principally from the point of external
interconnection. These connectors also
mate with traditional metal-faced D
connectors.
EMI/RFI SHIELD
–
A bright tin-plated
metal shield can be added to the
METAL-FACED connector to form a
complete metal enclosure. Laboratory
tests show that our Subminiature D
connector enclosed in our assembled
shield can reduce strays by up to
80dB. Performance comparison and
test results are indicated graphically in
the chart at right. When terminated to
jacketed-and-shielded flat cable,
properly stripped to expose an external
conductive surface, the shielding
interfaces redundantly with CW’s
conductive shield placing the entire
assembly at “ground”. CW’s shield can
be used on either cable end
terminations or in “daisy chain”
terminations along the cable. METAL
SHIELDS are available to cover 9, 15,
25, and 37 pin or socket Subminiature
D connectors. CW’s METAL SHIELDS
are designed for easy and rapid
assembly to our METAL-FACED
Subminiature D-connectors. No
supplemental fasteners or assembly
tools are required.
CW metal-faced D-Submin iatur e
con n ector w ith assembled EMI/RFI sh ield
Accepts standard flat
.050” centers multi-
conductor cable
Metal side plate with
teeth to clamp onto
cable jacket for extra
strain relief
Heavy aluminum/mylar foil
with external conductive
surface for best EMI/RFI
attenuation
One of
two shield-
grounding loops
Rugged PVC
jacket protects foil
from tears and
perforations
Dimples for
positioning
D face
Extruded and tapped holes
accept 4-40 mounting screws
22
•
130 James Way, Southampton, PA 18966 - 3838
•
Telephone: (215) 355-7080
•
Fax: (215) 355-1088
•
www.cwind.com
Radiated Emission @ 3.0 Meters (dBµ V/M)
D-Submin iatur e con n ector w ith metal face
CW metal faced D-Subminiature connectors are
ideal for input/output applications and interconnecting
electronic equipment. These connectors are designed
to the applicable standards of Mil-DTL-24308 and
are interchangeable and mateable with other
connectors so designed.
D-Subminiature
Metal flange can minimize
radiation at I/O ports
L
P
Q
MI
AP
OVED
PR
L-
D
TL-
8
Metal face provides proper
mate for other metal-faced
D connectors
Assemble an EMI/RFI sh ield to our
D-Submin iatur e con n ector in a sn ap
After terminating the connector to
C-03-021 or C-03-031 style jacketed
and shielded flat cable, slide the D-
Subminiature connector with metal
face into the preassembled shield.
Side plate
Hook the remaining
side plate into place
and snap together
Jacketed and
shielded cable
Aluminum shield
cable loop
Locking grip
D connector
End Cover
Side plate
Slot for side
plate hook
Dimples
for positioning
D face
Metal face
Slot for side
plate hook
Side
plate hook
35
03
•
130 James Way, Southampton, PA 18966 - 3838
•
Telephone: (215) 355-7080
•
Fax: (215) 355-1088
•
www.cwind.com
23
D-Subminiature
Har dw ar e Moun tin g Kits for Metal Faced D-Con n ector s
To order, specify CWN-HK-XX.
CWN-HK-07
Two 4-40 screws
and washers for
midspan splices of
two CW D-Submin-
iature connectors
with the CW EMI/RFI
shield.
FILLISTER
SCREW
C-06-12
LOCK
WASHER
G-07-06-02
HEX
NUT
C-28-01
LOCK
WASHER
G-07-06-02
CWN-HK-09
Two 4-40 screws,
lock washers and
retaining clips for
mounting other
manufacturers’ D-
Subminiatures in the
CW shield and mating
to CWN-HK-10.
HEX
NUT
C-28-01
LOCK
WASHER
G-07-06-02
CWN-HK-11
Two 4-40 screws,
lock washers and
four retaining clips
for mid span splices of
other manufacturers’
D-Subminiature
connectors in the
CW shield.
FILLISTER
SCREW
C-06-12
LOCK
WASHER
G-07-06-02
RETAINING
CLIP
C-45-04
FLAT
WASHER
G-07-05-01
LOCK
WASHER
G-07-06-02
FILLISTER
SCREW
C-06-10
MALE/FEMALE
STANDOFF
C-83-05
MALE/FEMALE
STANDOFF
C-83-10
CWN-HK-12
Two 4-40 screws
with four washers
for mating CW
D-Subminiature
connectors with the
CW EMI/RFI shield
to front or rear panel
mounted connector.
*Flat washer not
used when mated
with front panel
mounted connector.
RETAINING
CLIP
C-45-04
CWN-HK-08
Two 4-40 standoffs
with lock washers
and hex nuts for front
panel mounting of
D-Subminiature con-
nector with metal face.
LOCK
WASHER
G-07-06-02
FILLISTER
SCREW
C-06-10
CWN-HK-10
Two 4-40 standoffs
with lock washers
and nuts for rear
panel mounting of
D-Subminiature
connector with
metal face.
RETAINING
CLIP
C-45-04
How to Or der D-Submin iatur e Con n ector s w ith Metal Face
Type of Connector
282=D-Subminiature with metal face for
cable end terminations, pin
contact (Standard)
283=D-Subminiature with metal face for
cable end terminations, socket
contact (Standard)
280=D-Subminiature connector with
metal face for daisy chain
applications, pin contact
281=D-Subminiature connector with
metal face for daisy chain
applications, socket contact
CWR-XXX-XX-00XX
Number of Contacts
(9, 15, 25 or 37)
Plating
0021=30µ in. gold (in mating
area) over 50µ in.
nickel (standard)
0000=10µ in. gold (in mating
area) over 50µ in.
nickel
0022=50µ in. gold (in mating
area) over 50µ in.
nickel
Mil-DTL-24308
approved.
0003=100µ in. tin-lead
How to Or der EMI/RFI Sh ield
Type of Shield
292=Shield for
cable end
terminations
290=Shield for
daisy chain
terminations
CWN-XXX-XX-8901
Size
(09, 15,
25, 37)
Note: For information on 100% tested, ready-to-
use cable assemblies, contact the factory
or your local value-added distributor.
•
130 James Way, Southampton, PA 18966 - 3838
•
Telephone: (215) 355-7080
•
Fax: (215) 355-1088
•
www.cwind.com
25
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