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Assembly and installation
Please note:
Cherry snap switches should only be installed by trained staff. Gener-
ally, adherence to the required air gap and creepage distance must be
ensured with suitable measures. These must also be adhered to for lines
connected to the switch.
If installation is to occur on a conductive surface, insulating panels must
be used. Under some circumstances, their use is also required between
switches installed alongside one another and plug-in connections. Switches
can be installed in any position. Power transmission to the connections of
the switch is not permitted. When fastening with screws, screws with a
co-planar contact surface must be used (e.g. in accordance with DIN 84,
DIN 912). Smooth, solid surfaces are suitable for installation.
Exceeding of the following tightening torque values is not permissible. We
recommend trial installations. If you wish to install your switches using
coupling pins, we would be happy to advise you on suitable parameters.
Please note:
If components are likely to be subjected to vibrations, we advise you to
take additional measures to secure them. With solder connections, the
product-speci?c solder recommendations must be heeded in order to
prevent damage or destruction of the switches.
Please note:
Cleaning agents and solvents in proximity to the switches can impair
their function, especially in case of watertight models. When using
greases (especially mineral oil-based ones), we recommend consultation
with ZF Electronics. The switching action may be initiated by a force act-
ing vertically on the actuator, or by an angled actuation lever.
Example:
The angle of the lever in relation to the top of the switch housing should
not exceed 30 °. The precise angle will also depend on the actuating speed,
combination of materials, surface characteristics and so on. In case of aux-
iliary actuators with rollers or simulated rollers, steps should be taken to
ensure that the lever does not impede its own action. This means that the
direction of actuation should be away from the actuator ’s mounting point
towards the roller, and the angle of actuation should be adjusted to allow
for the geometry of the actuation system. We would always recommend a
preliminary discussion with ZF Electronics.
Please note:
The actuator may not be pre-stressed when at rest. When actuated, the
switch should travel well beyond the switching point. for at least 50 % of
the prede?ned overtravel, in order to ensure that full contact is made.
It is quite unacceptable for the switch to exceed the speci?ed overtravel
or end position. Using the switch as a mechanical end stop should be
avoided. A high-impact actuation of the switch can have a negative effect
on the switch’s mechanical life.
Switch
DH
DG
DB, DZ
DC
D3, D4
Screw
M 1,6
M2
M 2,3
M 2,3
M3
max. tightening torque
10 N cm
13 N cm
12 N cm
20 N cm
60 N cm
21
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