A22TK
Safety Precautions
Be sure to read the precautions for all pushbutton switches in the website at www.ia.omron.com.
damaged and may not operate properly.
• Be sure to use the supplied Lock Ring. Otherwise, the switch may
rotate and may not operate properly.
DANGER
Always confirm that safety functions are operational
before stating operation. Wiring mistakes, setting
mistakes, switch failure or other factors may prevent
safety functions from operating. This may result in the
machine continuing to operate, possibly resulting in
human accidents.
Others
• Do not attempt to disassemble or modify the Switch. Doing so may
cause the Switch to malfunction.
• The durability of the Switch is greatly influenced by the switching
conditions. Always test the switch under actual working conditions
before application and use it in a switching circuit for which there
are no problems with performance.
• The user must not maintain or repair equipment incorporating the
Switch. Contact the manufacturer of the equipment for any
maintenance or repairs required.
CAUTION
If the Operation Unit is separated from the Socket Unit,
the equipment will not stop, creating a hazardous
condition.
Secure the lever on the Socket Unit by using the A22Z-
3380 Lock Plate so that the Operation Unit cannot be
easily separated from the Socket Unit.
Precautions for Correct Use
Operating Environment
• This Switch is designed for use indoors.
Using the Switch outdoors may damage it.
(Refer to “Mounting the Lock Plate” at the right.)
• Do not use the Switch where corrosive gases (e.g., H2S, SO2, NH3,
HNO3, or CI2) are present or in locations subject to high
temperature and humidity. Doing so may result in damage to the
Switch as a result of contact failure or corrosion.
• Do not use the Switch in any of the following locations.
• Locations subject to extreme temperature changes
• Locations subject to high humidity or condensation
• Locations subject to excessive vibration
[Used in combination with a Slide Key]
The machine may operate, possibly causing injury.
Do not disable safety function by using a spare door
switch operation key or spare key with the door
open.
[Used outside/inside hazardous area]
The machine may operate, possibly causing injury.
Do not disable safety function by using a spare key
outside or inside the hazardous area.
• Locations where metal dust, processing waste, oil, or chemicals
may enter through the protective door
• Locations subject to detergents, thinners, or other solvents
Storage
• Do not store the Switch where corrosive gases (e.g., H2S, SO2,
NH3, HNO3, or Cl2) or dust is present, or in locations subject to high
temperature or high humidity.
Precautions for Safe Use
Installation Environment
• Do not use the switch in locations where explosive or flammable
gasses may be present.
Mounting
• Do not tighten the mounting ring more than necessary using tools
such as pointed-nose pliers. Doing so will damage the mounting
ring. The tightening torque is 0.98 to 1.96 N·m.
• 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.
• Recommended panel thickness: 1 to 5 mm.
Wiring
Mounting the Lock Plate
• Connect a fuse in series with the A22TK to protect it from
shortcircuit damage. The value of the breaking current of the fuse
must be calculated by multiplying the rated current by 150ꢀ to
200ꢀ.
1. Confirm that the lever on the Mounting Latch is on the side where
the Operation Unit is secured and then insert the protrusion on the
Lock Plate into the hole in the lever on the Mounting Latch.
2. Press the hole on the Lock Plate onto the protrusion on the Mount-
ing Latch until it clicks into place.
When using the A22TK for an EN rating, use a 10-A fuse of type gI
or gG that complies with IEC 60269.
After mounting the Lock Plate, check that the lever does not move.
• Always make sure that the power is turned OFF before wiring the
Switch.
Also, do not touch the terminals or other current-carrying ports
while power is being supplied.
2.
Lock Plate
Lever
1.
L
O
O
C
P
E
K
N
• Check the contact specifications before mounting the Switch
Block. Use an NC contact for a safety circuit. It may not operate
properly. Check the Switch Block for safe operation before use.
• Check the operating specification before mounting the Operation
Unit. It may not operate properly. Check the Operation Unit for safe
operation before use.
Operation Unit
Mounting Latch
Operating the Key
Installation
• When rotating the key to the total travel position or free position,
• Do not drop the Switch. Doing so may prevent the Switch from
functioning to its full capability.
the operating force must be 1.47 N·m max.
• Make sure the Switch is mounted securely to prevent it from falling
off. Otherwise injury may result.
• Mount the Operation Key so that it will not come into contact with
persons in the area when the door is opened and closed. Injury
may result.
• Do not use a Switch as a stopper. Otherwise, the switch may be
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