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Precautions
Refer to the Technical Information for Limit Switches (Cat. No. C121).
■ Correct Use
Do not solder the screw terminals.
Sealing materials may deteriorate when used outdoors or when
exposed to cutting oil, solvents, or chemicals. Check this on actual
equipment and, if deterioration is foreseen, consult your OMRON
representative in advance.
If the one-touch connector is to be mounted onto the switch body,
lightly push up the fitting so that the switch body can then be inserted
into the clamp.
Insert the switch
body
Be sure that the clamp is inserted to the full depth, because the
Switch will not function properly if one of the clamps is improperly
inserted.
Switch body
Clamp fitting
If the clamp is properly inserted up to the full depth, it will not slide
out easily. Be sure to carefully confirm all the above items.
Be sure to connect a fuse with a breaking current 1.5 to 2 times 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 under the EN ratings, use a gI or gG 10-A fuse
that conforms to IEC260.
Lightly push up the filling on the
left and right side alternately.
Confirm
visually
Mounting
Secure the Switch with two M4 screws and washers. The tightening
torque applied to each terminal must be 1.18 to 1.37 N·m. Tighten
the screws to the specified torque. An excessive tightening torque
may damage the Switch and cause a malfunction.
Mounting Holes
Two, 4.3 dia. or M4 hole
33±0.15
When mounting the panel mount-type Switch with screws on a side
surface, remove the hexagonal nuts from the actuator.
When mounting the panel mount type on a panel, tighten the hexag-
onal nuts of the actuator to a torque less than 7.85 N·m.
Mounting Hole
Operating method, shape of cam or dog, operating frequency, and
the overtravel (OT) have significant effect on the service life and pre-
cision of the Limit Switch. Make sure that the shape of the cam is
smooth enough.
Check that OT has a sufficient margin. The actual OT should be
rated OT x 0.7 to 1.
Do not change the operating position by remodeling the actuator.
Wiring
When wiring screw terminals, M3-size round solderless terminals
with an insulation tube is recommended. The conductor size should
2
be 0.75 mm
and cable diameter should be 7 mm.
Refer to the following when wiring.
D dia.
dz dia.: 3.2
D dia.:
1.9
B:
5.2
L:
16.4
F:
5.8
l:
8.0 (mm)
Wiring Method
D4E-N
Round solderless terminal
Small Sealed Switch
14.5±0.2 dia.
d
dia.
z
D4E-@
N
F-43
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