Northern Connectors Harting D-sub Connectors, Housings & Accessories - Manual (Page 91)

05
90
D-Sub
General information
Interference – Yesterdays problem!
In a fast developing technological environment
the management of electromagnetic interference
is becoming more challenging.
Therefore HARTING developed a range of
filter solutions to help designers of electronic
equipments to achieve the demanding goal of
electromagnetic compatibility.
HARTING offers a wide range of solutions by
the integration of a filter inside one of the most
standard I/O ports on the market; the D-Sub.
From standard simple ferrite-filter solution to
complex customized high performance filters, you
will be able to find in the HARTING filter D-Sub
range the adequate solution to protect your
application from any introduction or radiation of
noise through D-Sub port apertures.
Advantages
Wide range:
• 9, 15, 25 and 37 contact versions
• Various terminations such as solder buckets,
straight and right angled solder pins
• A large range of accessories
• High performance (C-filter) as well as simple,
quick and cost effective solutions (ferrite-filter)
Compatible with standard wave and lead-free
reflow soldering (C-filter)
Same layout and shell dimensions as standard
D-Sub connectors, no modification of PCB design
necessary
Elimination of ringing, crosstalk phenomenon
thanks to specific multilayer PCB used in C-filter
design.
Flexible filter structure allowing a wide range of
customization:
• Filter value (even pin by pin approach)
• Pi-filter
• Dielectric withstanding and working voltage
• Specific ESD / lightening protection
HARTINGs broad Filter range
Ferrite-filter
Ferrite-filter D-Subs providing a low level of
filtering thanks to simple blocks of inductive ferrite
attached to the back end of the connectors.
Providing a few dB attenuation only at high
frequencies HARTING ferrite-filter D-Subs
represent a cost effective solution in applications
where the emission level is close to the limit.
C-filter
To address higher EMI disturbances HARTING
propose a comprehensive range of C-filter D-Sub
connectors. HARTING C-filter D-Sub integrates
a patented 4 layer printed circuit board equipped
with chip capacitors. This patented solution
provides complete protection of the I/O port due
to the filtering performance of the capacitors and
the screening effect of the PCB. Further more the
4 layers PCB also limits the ability of interference to
enter the equipment through the D-Sub aperture.
Available in 4 standard filter values 47, 470, 1000
and 3900 pF HARTING C-filter D-Subs represent
for all designers a smart filtering solution allowing
replacement of a “defective” port by a filtered one
without any change of the PCB design.
Filter adapter
To support engineers in the diagnosis of EMI
disturbances HARTING has developed, in
addition to its filter series a range of male/female
filter D-Sub adapters.
These back-to-back adapters can be used as
testing tools and replaced later on in production
directly by a filtered D-Sub connector.
D-Sub
Ferrite block mounted directly
on rear side of the D-Sub
4 layers PCB populated
with SMT chip capacitors