SMC Networks SY3000 SERIES Operation Manuals page 12

SY series
Specific Product Precautions 3
Be sure to read this before handling
Light/Surge Voltage Suppressor Continuous Duty
If a valve is energized continuously for a long period of
time, the rise in temperature due to heat-up of the coil
assembly may cause a decline in solenoid valve
performance, reduce service life, or have adverse effects
on peripheral equipment. If the valve is energized
continuously for a long period of time, be sure to use a
valve with power saving circuit. In particular, if three or
more adjacent stations on the manifold are energized
simultaneously for extended periods of time or if the
valves on A side and B side are energized simultaneously
for a long period of time, take special care as the
temperature rise will be greater.
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SY3000V-OMM0002-B