Specifications

A-12 Safety-door Switch D4NS
D4NS
Safety Door Switches
Safety Precautions
Refer to the “Precautions for All Switches” on page I-2 and “Precautions for All Safety Door Switches” on page A-2.
■ Precautions for Safe Use
• Never disassemble or modify your D4NS in any way, or the D4NS
will not operate normally.
• Do not use the Switch submersed in oil or water or in locations
continuously subject to splashes of oil or water. Doing so may result
in oil or water entering the Switch. (The IP67 degree of protection of
the Switch specifies the amount of water penetration after the
Switch is submerged in water for a certain period of time.)
• Although the switch body is protected from the ingress of dust or
water, avoid the ingress of foreign substance through the key hole
on the head.
Otherwise, accelerated wear or breaking may result.
• Always be sure that the power supply is turned OFF while wiring
the Switch.
• Always attach the cover after completing wiring and before using
the Switch. Electric shock may occur if the Switch is used without
the cover attached.
• Connect a fuse in series with the D4NS to protect it from short-
circuit damage. The value of the breaking current of the fuse must
be calculated by multiplying the rated current by 150% to 200%.
When using the D4NS for an EN rating, use a 10-A fuse of type
gI
or
gG that complies with IEC 60269.
• When switching general loads (250 VAC/3 A), do not operate two
circuits or more at the same time. Otherwise, insulation
performance may be degraded.
Stopper Installation
Do not use a Switch as a stopper. Be sure to install a stopper as
shown in the following illustration when mounting the Switch so that
the base of the Operation Key does not strike the Head.
■ Precautions for Correct Use
The Switch contacts can be used with either standard loads or
microloads. Once the contacts have been used to switch a load,
however, they cannot be used to switch smaller loads. The contact
surfaces will become rough once they have been used and contact
reliability for smaller loads may be reduced.
Mounting Method
Tightening Torque
Loose screws may result in malfunction. Tighten the screws to the
specified torques.
Mounting Holes
• Use M4 screws and washers to mount the Switch and Operation
Key, and tighten the screws to the proper tightening torque. For
safety, use screws that cannot be easily removed or a similar
means to prevent the Switch and Operation Key from being easily
removed.
• As shown below, two studs with a maximum height of 4.8 mm and a
diameter of 4
mm can be provided, the studs inserted into the
holes on the bottom of the Switch, and the Switch secured at four
locations to increase the mounting strength.
• Use the designated OMRON Operation Key with the Switch. Using
another Operation Key may result in Switch damage.
• Set the Operation Key so that it is within 1 mm of the center of the
key hole. If the Operation Key is offset or at an angle, accelerated
wear or breaking may result.
• Observe the specified insertion radius for the Operation Key and
insert it in a direction perpendicular to the key hole.
Switch
Operation key
Stopper
Correct
Incorrect
Terminal screw 0.6 to 0.8 N·m
Cover clamping screw 0.5 to 0.7 N·m
Head clamping screw 0.5 to 0.6 N·m
Operation Key clamping screw 2.4 to 2.8 N·m
Body clamping screw 0.5 to 0.7 N·m
Conduit mounting connection and M12
adaptor
1.8 to 2.2 N·m
(except 1/2-14NPT)
1.4 to 1.8 N·m
(1/2-14NPT)
Cap screw 1.3 to 1.7 N·m
−0.05
−0.15
Switch Mounting Holes and Studs
• 1-Conduit Modules
2.5 ±0.1
22 ±0.1
47 ±0.1
4
-0.05
-0.15
dia.
Height: 4.8 max.
20
±0.1
22 ±0.1
Two, M4
42±0.1
39±0.1
20±0.1
22±0.1
40±0.1
42±0.1
2.5±0.1
5.35±0.1
Two, M4
4
-0.05
-0.15
dia.
Hei
g
ht: 4.8 max.
• 2-Conduit Modules
15±0.1
Two, M4
40±0.1
Two, M
4
41±0.1 or, 43±0.1
Two, M4
Operation Key Mounting Holes
• Horizontal/Vertical Mounting
(D4DS-K1/-K2)
• Horizontal Adjustable
Mounting (D4DS-K3)
• Horizontal/Vertical Adjustable
Mounting (D4DS-K5)