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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 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.

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.

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.

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