A22N/M22N/A30N
88
A30N
Pushbutton Switches
A22N
Selector Switches
A30N
Selector Switches
Subassemblies
(Common)
M22N
Indicators
A22N
Key-type Selector Switches
A30N
Key-type Selector Switches
Accessories
and Tools
Safety
Precautions
A22N
Pushbutton Switches
Safety Precautions
Refer to Safety Precautions for All Pushbutton Switches/Indicators.
Signal Word Definitions
For both the Screw terminal block type and the
Push-In Plus terminal block type
•Do not perform wiring with power supplied to the Switch/Indicator.
Do not touch the terminals or other charged parts while power is
being supplied. Doing so may result in electric shock.
•Do not disassemble or modify the Switch/Indicator under any
circumstances.
•Doing so may prevent the Switch/Indicator from functioning to its
full capability. Do not drop the Switch/Indicator. Do not apply
pressure that may deform or alter the Switch/Indicator.
•The durability of the Switch varies considerably depending on the
switching conditions. Always test the Switch/Indicator under actual
working conditions before application and use the Switch/Indicator
only for the number of switching operations allowed.
•Do not allow the load voltage and current to exceed the rated
value. This may damage or burn out the Switch/Indicator.
•Do not use the Switch/Indicator in locations where explosive or
flammable gases or liquid may be present or scattered. The
electric ark or the heat caused by switching contacts may cause a
fire or explosion.
•Do not use the Switch/Indicator in locations where toxic gases,
such as H2S, SO2, NH3, HNO3, and Cl2, may be present, or in
locations subject to high temperature or humidity. Doing so may
damage the Switch/Indicator due to contact failure or corrosion.
•Do not use the Switch/Indicator 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 and damaging the Switch/
Indicator.
•Do not use or keep the Switch/Indicator under the following
conditions:
•Subject to severe temperature changes.
•Subject to high humidity or condensation.
•Subject to severe vibration or shock.
•Where direct rays of the sun strike.
•Where sea breeze may be present.
•Make sure that a rubber washer is present between the Operation
Unit and the panel. Otherwise, the specifications of the protective
structure may not be satisfied.
•Do not apply excessive force to the Switch or wiring.
A damaged or deformed contact block may cause contact failure.
•Use an appropriate wire and ferrule.
•Exercise caution to avoid wiring errors when connecting the
terminals.
•To prevent wire from smoking or igniting, use the wire indicated in
the following table.
Use wiring crimp terminals and ferrule terminals of the specified size.
•For Push-In Plus terminal blocks, use only one wire per terminal.
For screw terminal blocks, use no more than two wires of the same
size and type with no more than two crimp terminals per terminal.
•After storing the product for a long time exceeding 1 year, perform,
at a minimum, inspections of the operating characteristics, contact
resistance, insulation resistance, and dielectric strength as well as
evaluate the product under the working conditions.
•This Switch/Indicator is intended for indoor use only.
Using the Switch/Indicator outdoors may result in failure.
Push-In Plus Terminal Blocks
•Do not wire anything to the release holes.
•Do not tilt or twist a flat-blade screwdriver while it is inserted into a
release hole on the terminal block. The terminal block may be
damaged.
•Insert a flat-blade screwdriver into the release holes at an angle.
The terminal block may be damaged if you insert the screwdriver
straight in.
•Do not allow the flat-blade screwdriver to fall out while it is inserted
into a release hole.
•Do not bend a wire past its natural bending radius or pull on it with
excessive force.
Doing so may cause the wire disconnection.
•Do not insert more than one wire into each terminal insertion hole.
•Do not mount A22N-P Push-In Plus terminal contact blocks on
A22N screw terminal blocks. Doing so may result in unsatisfactory
performance.
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,
malfunction, or undesirable effects on
product performance.
Precautions for Safe Use
Model Wire
Type Wire
Recommended
Wires Stripped length
A22N, M22N
(Screw terminal
block) Solid
wire/
stranded
wire
Copper
1.25 to 2.5 mm2
/ AWG 16 to 14
Solid wire:
1.6 mm max.
8 mm
A22N-P, M22N-P
(Push-In Plus
terminal block)
0.25 to 1.5 mm2
/
AWG 24 to 16
Ferrules used
: 10 mm
Ferrules not
used : 8 mm