Datasheet

16 Limit switches/Mechanical sensors
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 plu
nger 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.
Plug tightening
Connect the plug connector (B) to the connector threads of the
D4CC. Then firmly turn the plug connector by hand so that the
connector threaded portion (C) will be completely covered by the
plug connector (B) so that space (A) will be almost 0. Do not use any
tools, such as pliers, to tighten the plug connector, otherwise the
plug connector may become damaged. Make sure, however, that the
plug connector is tightened securely, otherwise the rated degree of
protection of the D4CC may not be maintained. Furthermore, the
plug connector may be loosened by vibration.
Properly tightened connector
Mounting
A maximum of 6 Switches may be group-mounted. In this case, pay
attention to the mounting direction so that the convex part of the
group-mounting guide on one Switch fits into the concave pa rt of the
guide on the other Switch as shown in the figure below. For group
mounting, the mounting panel must have a thickness (t) of 6 mm min.
Group mounting
If the mounting panel is warped or has protruding parts, a
malfunction may result. Make sure that the mounting panel is not
warped and has even surfaces.
Mounting Holes
Use a Switch with a rubber cap when using the plunger type in a n
environment where malfunction is possible due to environmental
conditions such as dust or cutting chips which may not allow
resetting.
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
(B)(C)
(A)
D4CC
(A)
(B)
D4CC
16 mm
t
Mounting panel
Group-mounting guide
(Front: convex
Rear: concave)
Group-mounting guide
(Front: convex
Rear: concave)
Two, 5.2-dia. or M5 screw holes