SMC Networks CRB2BW40 Series, Руководство по эксплуатации

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Front matter11
Auto Switches Precautions
Design / Selection
(1)
Confirm the specifications.
Read the specifications carefully and use this product appropriately. The product may be damaged or
malfunction if it is used outside the range of specifications of current load, voltage, temperature or impact.
We do not guarantee against any damage if the product is used outside of the specification range.
(2)
Cautions for use in an interlock circuit
When an auto switch is used for an interlock signal requiring high reliability, devise a double interlock system
to avoid trouble by providing a mechanical protection function, or by also using another switch (sensor) together
with the auto switch.
Also, perform regular maintenance and confirm proper operation.
(3)
Do not make any modifications (including exchanging the printed circuit boards) to the product.
This may cause human injuries and accidents.
(1)
Pay attention to the length of time when a switch is ON at an intermediate stroke position.
When an auto switch is placed at an intermediate position of the stroke and a load is driven , at the time the
piston passes the auto switch will operate, but if the speed is too great the operating time will be shortened and
the load may not operate properly.
The maximum piston speed is:
V ( mm / s ) = ×1000
(2)
Keep wiring as short as possible.
<Reed>
As the length of the wiring to a load gets longer, the rush current at switching ON becomes greater, and this
may shorten the product’s life. (The switch will stay ON all the time.)
1)
Use a contact protection box when the wire length is 5m or longer.
2)
Even if an auto switch has a built-in contact protection circuit, when the wiring is more than 30m long, it is
not able to adequately absorb the rush current and its life may be reduced.
It is again necessary to connect a contact protection box in order to extend its life. Please consult SMC in
this case.
<Solid state>
3)
Although wire length should not affect switch function, use a wire 100m or shorter.
Even if the length is less than 100m, longer wiring makes it more likely to be affected by noise.
When the wire length is long, we recommended a ferrite core should be attached to both ends of the cable
to prevent excess noise.
A contact protection box is not necessary for solid state switches due to the nature of the product construction.
Auto switch operating range (mm)
Load applied time (ms)
Warning
Caution
2020-08-27 13:47
DI006501