Terminal Connections - Omron VX Series Manual

General Information
Incorrect
Snap-back
Shock operation
Correct
•
Make sure that no improper force is applied to the actuator,
otherwise the actuator may incur local abrasion. As a result, the
actuator may become damaged or its durability may be
deteriorated.
Incorrect
Roller
Dog
Operating
body
•
Make sure that the operating body moves in a direction where
the actuator moves. If the actuator is a pin plunger type, make
sure that the operating body presses the pin plunger vertically.
•
Operate the actuator of a hinge roller lever or simulated hinge
lever type in the direction shown below.
Incorrect
•
Set the angle of the cam or dog (θ) for roller levers and similar
actuators to the range between 30_ and 45_. If the angle is too
large, an abnormally large horizontal stress will be applied to the
lever.
Correct
Operating
body
: Correct
: Incorrect
Correct
•
Do not modify the actuator. If the actuator is modified, excessive
external force may be applied to the internal switch mechanism,
characteristics may change, and the switch may stop
functioning.
•
If an external actuator is used as an operating object, check the
material and thickness of the lever to make sure that the force
applied to the lever is within the permissible range.
Mounting
Securing
When mounting a switch, be sure to use the specified mounting
screws and tighten the screws with flat washers or spring washers
securely.
However, the switch housing may incur crack damage if it comes
into contact with the spring washers directly. In that case make sure
that the flat washers come into contact with the switch housing as
shown below. Do not subject the switch to excessive shock or high-
frequency vibrations when mounting (e.g., do not use an impact
driver) as it may cause contacts stick or switch damage.
Incorrect
Screw
Flat washer
Spring washer
Resin
Do not modify the switch in any way, for example, by widening the
mounting holes.
Locking Agent
If glue or locking agent is applied, make sure that it does not stick to
the moving parts or intrude into the inside of the switch, otherwise
the switch may have operating failure or contact failure. Some types
of glue or locking agent may generate gas that has a bad influence
on the switch. Pay the utmost attention when selecting glue or lock-
ing agent.
Wiring
Make sure that the lead wires are connected with no inappropriate
pulling force.
Mounting Location
Be sure not to mount a switch in locations where the switch may be
actuated by mistake.
Maintenance and Inspection
Make sure that a switch is mounted in locations that allow easy
inspection or replacement of the switch.
Mounting Direction
When using a switch with a low operating force mounted with a long
lever, make sure that the switch is mounted in the direction where
the weight of the lever is not applied to the pushbutton directly,
otherwise the switch may have releasing failures.

Terminal Connections

Solder Terminals
When soldering lead wires to a switch, make sure that the tempera-
ture of the iron tip is 380°C maximum. Improper soldering may
cause abnormal heat radiation from the switch and the switch may
burn.
Complete soldering within 5 seconds at 350°C or within 3 seconds
at 380°C. If heat is applied for longer period of time, switch charac-
teristics will be deteriorated, e.g., the case will melt and lead wire
insulation will scorch.
Soldering conditions are even more strict for ultra subminiature
switches. Refer to the Precautions for individual models for details.
Quick-Connect Terminals
Use the specified receptacles to connect to quick-connect termi-
nals. Do not apply excessive force horizontally or vertically to the
General Information
Correct
29