Northern Connectors Harting DIN 41 612 Connectors - Manual (Page 33)

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Terminations
Wire wrap terminals
This technique permits high wiring density and takes over where other
techniques would take up too much real estate. As a result of this
process, there is a great time saving factor and cost per connection is
relatively low when large numbers of connections are to be made.
When wires are correctly wrapped onto a precision manufactured
rectangular post produced to the recommended specifications, one
can state the following:
A low resistance, mechanically strong and highly reliable con-
nection is made which is unaffected by normal climatic or tem-
perature changes.
Production of wrapped connections and associated material are de fined
in DIN EN 60 352-1.
Wrapping techniques
Standard wrap
Only the non-insulated part of the wire is wrapped around the
post. This means that the size of the wrapped connection is
kept to the very minimum.
Modified wrap
The top part of the wrapped connection is made using the
cable conductor as stated above but an extra turn is made at
the bottom. For this turn insulation is also wrapped around the
post to give a great mechanical strength to the joint and also
to provide insulation between adjacent posts.
Wrapping tools
To produce quality wrapped connections one must use a special
wrapping tool, which can be pneumatic, electric or hand operated.
Such tools have interchangeable wrapping heads and sleeves to suit
the particular size of the wrap post being used.
The choice of accessories for these wrapping tools depends from the
wrapping technique, the size of the wrap post itself and the conductor
and insulation diameters of the wire.
The adjacent tables show the maximum amount of wrapped connections
that can be placed on the wire wrap post (in acc. to IEC 60352-1).
Standard wrap
Dimension
of wire wrap
post [mm]
Length
of wire wrap
post [mm]
possible wrap connections
per wrap post
Wire diameter [mm]
0.25 0.32 0.4 0.5 0.65 0.8 1.0
0.7 0.9 1.17 1.27 1.32 1.5 1.78
7 7 6 5 4 4 4
max. allowed wire Ø incl. wire insulation [mm]
min. necessary turns per wrap
connection (for non-insulated wire)
0.6 x 0.6 13 6 5 4 4 4 3 2
0.6 x 0.6 17 8 6 6 5 5 4 3
1 x 1 20 10 7 7 6 6 5 4
1 x 1 22 11 8 7 7 6 5 4
Valid for
standard wrap
Table 00.05
Table 00.06
Modified wrap
Dimension
of wire wrap
post [mm]
Length
of wire wrap
post [mm]
possible wrap connections
per wrap post
Wire diameter [mm]
0.25 0.32 0.4 0.5 0.65 0.8 1,0
0.7 0.9 1.17 1.27 1.32 1.5 1.78
7 7 6 5 4 4 4
max. allowed wire Ø incl. wire insulation [mm]
min. necessary turns per wrap
connection (for non-insulated wire)
0.6 x 0.6 13 4 3 2 2 2 2 1
0.6 x 0.6 17 5 4 3 3 3 2 2
1 x 1 20 6 4 4 3 3 3 2
1 x 1 22 6 5 4 4 4 3 2
Valid for
modified wrap