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A4EG
Safety Precautions
!WARNING
Always verify the operation of the safety functions before
starting the system. Not doing so may result in the safety
functions not performing as expected if the wiring or
settings are incorrect or the switches have failed.
Do not drop the switch. Doing so may damage the switch
and the system may continue to operate, possibly
causing injury or death.
Precautions for Safe Use
• This product is a switch for teaching the machine such as robot in
hazardous area. The machine is allowed to operate only when
operating the switch continuously. Configure the system so that the
machine can be operated only at position 2.
• Apply load current not to exceed the rated value.
• Do not use the switch submerged 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.
• Do not use the switch in locations where explosive or flammable
gasses may be present.
• Mount the switch securely to prevent it from falling. Otherwise,
injuries may occur.
• The durability of the switch is greatly influenced by the switching
conditions. Always test the switch under actual conditions before
application and use it in a switching circuit for which there are no
problems with performance.
• 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.
• The user must not maintain or repair equipment incorporating the
switch. Contact the manufacturer of the equipment for any
maintenance or repairs required.
• Do not disassemble or remodel the switch in any case, or the
switch will not operate normally.
• Do not override by inserting the Holding Key itself in the door
switch.
• Configure the circuit so that the machine does not operate when
operating the Enabling Switch while the Holding Key is being
inserted in the door switch.
• Do not impose excessive vibration or shock on the Door Switch
while the Holding Key is inserted. Excessive vibration or shock
may cause the Switch to fail or break.
• Do not incline and pull the switch body or do not impose shock on
the switch body in the directions shown with the arrows in Fig.1.
Otherwise, the switch may be damaged and may not operate
properly.
• Refer to the D4NS Safety-door Switch Datasheet and Instruction
Sheet about the storage, ambient conditions, the details and
handling of the Switch.
Fig. 1
Insertion-pull direction
(Perpendicular direction)
No operation
No operation
No operation
Holding Key
A4EG-OP3
(sold separately)
12
A4EG
Top position
No operation
Arrow indicates
insertion-pull direction.
Magnified View
Mounting surface
D4NS (sold separately)
Precautions for Correct Use
• Do not hold the Enabling Switch Device at Position 2 by any other
methods except for handling. Otherwise, the original function of the
Enabling Switch Device is not worked.
Operating Environment
• This switch is designed for use indoors. Using the switch outdoors
may damage it.
• The switch contacts can be used with either standard loads or
microloads. Once the contact 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.
• Do not use the switch in the following locations.
• Locations where the interior of the Protective Door may into
direct contact with cutting chips, metal filings, oil chemicals
• Locations subject to detergents, thinners, or other solvents
• Locations subject to sudden temperature changes
• Locations subject to high humidity and condensation
• Locations subject to severe vibration
• Do not use the switch where corrosive gasses (e.g.,H
NH
,HNO
, or Cl
) are present or in locations subject to high
3
3
2
temperature and humidity. Doing so may result in damage to the
switch as a result of contact failure or corrosion.
• Do not store the switch where corrosive gasses (e.g.,H
NH
,HNO
, or Cl
) or dust are present or in high temperature and
3
3
2
humidity.
• If the switch is not turned ON and OFF for a long period of time,
contact resistance may be increased or continuity failure may
occur due to contact oxidation.
Mounting Method
Specified Tightening Torque
Loose screws may result in malfunction. Tighten the screws at the
specified torques.
Item
Cover mounting screw
Terminal screw
Holding Key mounting screw
Conduit Connector mounting
(Conforming spanner 27 mm
(width across flats))
Mounting Bracket
Cover Mounting
• Dislocation of the seal rubber or foreign substance on the seal
rubber reduces seal performance of the switch. Mount the cover
after confirming that there is no abnormality on the seal rubber. If
the seal rubber cracks or breaks, replace the Cover with a new one
(A4EG-OP1 Rubber Cover, separately sold).
• Do not touch the rubber boot with sharp objects. Otherwise, the
rubber boot may break and the operating characteristics and the
seal performance may not be satisfied.
Seal Cover, A4EG-OP1 (sold separately)
Rubber boot
Installing Mounting Bracket
• Securely install the Mounting Bracket using M5 screws and
washers and tighten them to a torque of 2.4 to 2.8 N·m.
S, SO
,
2
2
S, SO
2
2
Specified torque
1.1 to 1.3 N·m
0.4 to 0.5 N·m
0.5 to 0.7 N·m
2.0 to 2.4 N·m
2.4 to 2.8 N·m
Seal rubber
,
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