Enclosed Switch
D4C
F-29
Lim
it
Switch
es
Precautions
■
Correct Use
Handling
The bottom of the Switch at the cable outlet is resin-molded. Secure
the cable at a point 5 cm from the Switch bottom to prevent exertion
of excess force on the cable.
When bending the cable, provide a bending radius of 45 mm min. so
as not to damage the cable insulation or sheath. Excessive bending
may cause fire or leakage current.
Connections
Be sure to connect a fuse with a breaking current 1.5 to 2 times
larger than the rated current to the Limit Switch in series in order to
protect the Limit Switch from damage due to short-circuiting.
When using the Limit Switch for the EN ratings, use the gI or gG 10-
A fuse.
Operation
Operation method, shapes of cam and dog, operating frequency, and
overtravel have a significant effect on the service life and precision of
a Limit Switch. For this reason, the dog angle must be 30
°
max., the
surface roughness of the dog must be 6.3S min. and hardness must
be Hv400 to 500.
To allow the plunger-type actuator to travel properly, adjust the dog
and cam to the proper setting positions. The proper position is where
the plunger groove fits the bushing top.
To allow the roller lever-type actuator to travel properly, adjust the
dog and cam so that the arrow head is positioned between the two
convex markers as shown below.
5 cm
Secure
here
Bending radius:
(R45 mm min.)
2.8 mm
Dog
Groove
Bushing top
Arrowhead
Correct
Not correct
Not correct
Correct
Convex
markers