Mounting - SMC Networks SY 3000 Series Operation Manual

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５ ５ ５ ５ Port Solenoid Valve／ ／ ／ ／ Precautions② ② ② ②
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Be sure to read before handing.
Selection
Caution
③ ③ ③ ③ Solenoid valve drive for AC with solid state output
(SSR, TRIAC output, etc.)
1)Voltage leakage
When using a snubber circuit (C-R element) for surge protection
of the output element, very small electric current will still continue to
flow in spite of the OFF state. This results in the valve not returning.
In the cases when exceeding the tolerance as shown above, take
measures to install a bleeder resistor.
2) Minimum allowable load (Min. load current)
When the consumption current of a valve is equal or less than the
output element's the minimum allowable load volume or the margin
is small, the output element may not be switched normally. Please
confirm SMC.
④ ④ ④ ④ Surge voltage suppressor Surge voltage suppressor
Surge voltage suppressor Surge voltage suppressor
If a surge protection circuit contains non-ordinary diodes such as
Zener diodes or Varistor, a residual voltage that is in proportion to
the protective elements and the rated voltage will remain.
Therefore, give consideration to surge voltage protection of the
controller. In the case of diodes, the residual voltage is
approximately 1 V.
⑤ ⑤ ⑤ ⑤ Low temperature operation Low temperature operation Low temperature operation Low temperature operation
Unless otherwise indicated in the specifications for each valve,
operation is possible to –10℃, but appropriate measures should be
taken to avoid solidification or freezing of drainage and moisture,
etc.
⑥ ⑥ ⑥ ⑥ Using Using for air blow for air blow
Using Using for air blow for air blow
When using a solenoid valve for air blow, use an external pilot type.
Take note that when internal pilots and external pilots are used on
the same manifold, the pressure drop caused by the air blowing can
have an effect on the internal pilot type valves. Moreover, when
compressed air within the pressure range of the established
specifications is supplied to the external pilot port, and a double
solenoid valve is used for air blowing, the solenoids should normally
be energized when air is being blown.
⑦ ⑦ ⑦ ⑦ Mounting orientation Mounting orientation Mounting orientation Mounting orientation
No specific oriantation is necessary.
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３０００・ ・ ・ ・ ５０００ ３０００ ３０００ ５０００・ ・ ・ ・ ７０００ ５０００ ５０００ ７０００ ７０００Ｓｅｒｉｅｓ ７０００ Ｓｅｒｉｅｓ Ｓｅｒｉｅｓ Ｓｅｒｉｅｓ
Warning
① ① ① ① If air leakage increases or equipment does not
operate properly, stop operation.
Check mounting conditions when air and power supplies are
connected. Initial function and leakage tests should be performed
after installation.
② ② ② ② Instruction manual
Mount and operate the product after reading the manual carefully
and understanding its contents. Also keep the manual where it
can be referred to as necessary.
③ ③ ③ ③ Painting and Coating
Warnings or specifications printed or pasted on the product
should not be erased, removed or covered up. Consult SMC if
paint is to be applied to resinous parts, as this may have an
adverse effect due to the paint solvent.
Caution Caution
Caution Caution
① ① ① ① Preparation before piping
Before piping is connected, it should be thoroughly blown out with
air (flushing) or washed to remove chips, cutting oil and other
debris from inside the pipe.
② ② ② ② Wrapping of sealant tape
When connecting pipes and fittings, etc. be sure that chips from
the pipe thread and sealing materials do not get inside the valve.
Furthermore, when pipe tape is used, leave 1.5 to 2 thread ridges
exposed at the end of the threads.
③ ③ ③ ③ Closed Center valves
When using closed center type valves, check carefully to be sure
there are no air leaks from the piping between the valves and
cylinders.
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Mounting

Piping
SY3000*-OMJ0003-A