A22TK
12
Safety Precautions
Be sure to read the precautions for All Pushbutton Switches in the website at:http://www.ia.omron.com/.
Indication and Meaning for Safe Use
Installation Environment
• Do not use the switch in locations where explosive or flammable
gasses may be present.
• 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.
Wiring
• 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 150% to
200%.
When using the A22TK for an EN rating, use a 10-A fuse of type gI
or gG that complies with IEC 60269.
• 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.
• 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.
Installation
• Do not drop the Switch. Doing so may prevent the Switch from
functioning to its full capability.
• 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
damaged and may not operate properly.
• Be sure to use the supplied Lock Ring. Otherwise, the switch may
rotate and may not operate properly.
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.
Indicates an imminently hazardous
situation which, if not avoided, is likely to
result in serious injury or may result in
death. Additionally there may be severe
property damage.
Indicates a potentially hazardous situation
which, if not avoided, may result in minor
or moderate injury or in property damage.
Precautions
for Safe Use
Supplementary comments on what to do
or avoid doing, to use the product safely.
Precautions
for Correct
Use
Supplementary comments on what to do
or avoid doing, to prevent failure to
operate, or undesirable effect on product
performance.
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.
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.
(Refer to “Mounting the Lock Plate” at the right.)
[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.
DANGER
CAUTION
Precautions for Safe Use
