CHM
2.0 CONNECTOR SYSTEM
acc. to IEC 61076 - 4 - 101
CM-1/899
CHM 2.0
Contents
Connector System acc to IEC 61076-4-101
Definition of Terms ........................................................................................................................ 3
Technical Data ................................................................................................................................ 4
System Modularity ......................................................................................................................... 5
Dimensions of Contacts ................................................................................................................. 6
Male Connectors Type A ................................................................................................................ 7
Female Connectors Type A ............................................................................................................ 9
Male Connectors Type B .............................................................................................................. 10
Female Connectors Type B ............................................................................................................ 11
Male Connectors Type B-22 ..............................................................................................................12
Female Connectors Type B-22 ....................................................................................................... 13
Male Connectors Type B-19 .......................................................................................................... 14
Female Connectors Type B-19 ....................................................................................................... 15
Male Connectors Type C ............................................................................................................... 16
Female Connectors Type C ........................................................................................................... 17
Male Connectors Type Compact PCI ............................................................................................. 18
Female Connectors Type Compact PCI ......................................................................................... 19
Male Connectors D ........................................................................................................................ 20
Male Connectors E ........................................................................................................................ 21
Male Connectors L ......................................................................................................................... 22
Male Connectors M ....................................................................................................................... 23
Male Connectors N ........................................................................................................................ 24
Shrouds A, B, B-22, B-19, C ........................................................................................................ 25
Shrouds AB ................................................................................................................................... 26
Coding Devices ............................................................................................................................. 27
Tools ............................................................................................................................................... 28
Order Number Index ..................................................................................................................... 32
Product Safety Information .......................................................................................................... 34
Fax Request Form ......................................................................................................................... 35
2
Dimensions are mm
Subject to changes
CHM 2.0
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.
Connector System acc to IEC 61076-4-101
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
Drillhole
0,6 mm
0,68 - 0,72 mm
min. 25
µ
m
5 - 15
µ
m
0,55 - 0,65 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.
Cu
Sn
Plated through
hole
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.
3
CHM 2.0
Technical Data
Electrical and mechanical data
Spacing
Temperature range
Mechanical durability
Mechanical durability
Housing
Contact resistance acc. to IEC 512-5
Contact material
Male contact
Female contact
Performance class 1
Performance class 2
Connector System acc to IEC 61076-4-101
2 mm
- 55
°
C bis +125
°
C
> 250 Mating Cycles
> 500 Mating Cycles
> 250 Mating Cycles
> 250 Mating Cycles
Polyester Glass filled acc. UL 94V-0
max. 20m
Ω
Bronze
Bronze
Au over PdNi over Ni
min. 10
4
MΩ
min. 10
4
MΩ
max. 0,75 N
max. 1 N
min. 0,15 N
min. 0,15 N
Male and female contact surface
Insulation resistance
acc. IEC 512-5
Insertion force per pin
Contact/Contact
Contact/Shield
Contact
Shield
Contact
Shield
Extraction force per pin
Test
s
voltage
e
Te t voltag
fully loaded
Row a, c, e
Row b, d
Row a, b, c
Row a, b, c, d
Row a, b, c, d, e
within row
between rows
within row
between rows
750 V
eff
1500 V
eff
750 V
eff
750 V
eff
every 2nd position
1500 V
eff
1500 V
eff
1500 V
eff
750 V
eff
Chessboard
--
--
1500 V
eff
1200 V
eff
Creepage- and
nd air gaps
Creepage- a
air gaps
fully loaded
Male connector
Modules
Female connector
every 2nd positon
Backplane Male
connector
Modules Female
connector
Chessboard
Backplane Male
connector
Modules Female
connector
Row a, c, e
Row b, d
Row a, b, c
Row a, b, c, d
Row a, b, c, d, e
within row
between rows
within row
between rows
0,8 mm
2,5 mm
0,8 mm
0,8 mm
0,6 mm
2,5 mm
0,6 mm
0,6 mm
2,5 mm
2,5 mm
2,5 mm
0,8 mm
2,5 mm
2,5 mm
2,5 mm
0,6 mm
--
--
2,5 mm
1,5 mm
--
--
2,5 mm
1,2 mm
4
Dimensions are mm
Subject to changes
CHM 2.0
Connector System acc to IEC 61076-4-101
0
A
A
A
M
A
L
A
A
25
50
C
75
A
*
A
B
A
B
B
100
**
N
A
A
A
A
125
150
B
A
B
B
175
200
C
225
L
*
A
A
250
**
System modularity
CHM 2.0 modules offer a great versatility to optimize large contact densities.
Especially the combination with coaxial or fiberoptic connections.
Stacking can be arranged from 50 mm using type A module, increasing
in 25 mm steps to required lengths.
Connectors with multifunction block (type A, M, L) are preferably used
at the top of any column. Type B is only used between other modules.
The modules type C and N (25 mm) are polarized and are used at the
bottom end of the columns.
350
* total length for Europa cards
** total length for ETSI PCBs
B
B
275
300
A
A
325
Correct mating is assured by use of coding keys within the multifunction
block and by use of type C and N modules.
A
375
400
5
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