CHM Datasheet, PDF (3/36 Pages) ITT Industries – 2.0 CONNECTOR SYSTEM

CHM 2.0
Connector System acc to IEC 61076-4-101
Definition of Terms
Connector according to IEC 61076-4-101
The hardmetric connector system CHM 2.0 was developed according to
the international standard IEC 61076-4-101. As a result, a worldwide
standard for the combination of PCBs is safeguarded by multicontact
plug-and-socket connectors for customers.
PCBs can be exchanged without problems from system to system.
Important parameters like fixing, shielding and coding remain compatible
to all applications.
The long contacts with 11,25 mm are predominantly used for the shielding
rows z and f.
Through-hole specification of the PCB
Through-plated holes for signal contacts and shieldings in press-fit
techniques.
Hole Ø
0,6 mm
The spacing
The CHM 2.0 connectors have been developed with a spacing of 2 mm
between contacts. These connectors are modular and therefore can be
stacked together without interrupting the continuity of the 2 mm design.
No space is wasted within a row of connectors.
Drillhole
Cu
Sn
Plated through
hole
0,68 - 0,72 mm
min. 25 µm
5 - 15 µm
0,55 - 0,65 mm
Module stacking
To improve stacking and to avoid accidental reversal of connectors the
end of the housings engage the adjacent connector to insure exact
positioning onto the PCB board and give the modules the necessary
support.
Coding
In order to avoid accidental plug-in among PC boards the IEC 61076-4-
101 standard provides protection through coding. Coding keys are easily
hand inserted into the multifunction block of the connector module A, L
and M. The pins are colour coded for fast visual recognition.
Multifunction block
The modules A, L, M and compact PCI are equipped with a multifunction
block. The coding devices, according to the IEC standard, can be added
to the multifunction block. The guides guaranty the correct mating and
prohibit accidental reversal of the male and female connectors.
The coding devices may be assembled by a single plug and pulling tool
and/or again removed.
Contact length of the rear and front mating area
ITT Industries Cannon offers 3 different lengths for the front mating area
and 4 lengths for the rear mating area for the CHM 2.0 male connectors.
A tin-plated Wire Wrap type is equally available. Different contact lengths
are required for signal and ground contacts to establish first mate and
last break features.
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