SMC Networks CE2, User Manual

Page: 5 / 53

Operating and Storage Environments
Warning
1. Envionments to avoid
Avoid using or storing the products in the
following environments which may cause
failures.
If the products need to be used or stored in
those environments, take necessary measures.
a. Place where ambient temperature exceeds
the range of 0
℃
to 60
℃
.
b. Place where ambient humidity exceeds the
range of 25% to 85% RH.
c. Place where condensation occurs due to
sudden temperature change.
d. Place where atmosphere containing corrosive
gas, flammable gas or organic solvent.
e. Place where atmosphere containing
con-ductive powder such as dust and iron
chips, oil mist, salt, or organic solvent, or
splashing cutting chips, dust and cutting oil
(water , liquid) over the products.
f. Place where the products are exposed to
direct sunlight or radiated heat.
g. Place where strong electromagnetic noise is
generated (place where strong electric field,
strong magnetic field or surge is generated).
h. Place where static electricity is discharged or
condition that the products have electrostatic
discharge.
i. Place where strong high frequency is
gene-rated.
j. Place where damages of thunder are
expected.
k. Place where vibration or impact is directly
given to the products.
l. Condition that the products are deformed by
force or weight applied.
2. Do not close any objects which are affected
by magnets.
Since magnets are built in cylinders, do not close
magnetic disks, magnetic cards or magnetic
tapes. The data may be destroyed.
Precaution on Design
Warning
1. There is a possibility of dangerous sudden
action by cylinders if sliding parts of
machi-nery are twisted due to external forces,
etc.
In such cases, human injury may occur; e. g., by
catching hands or feet in the machinery, or
damage to the machinery itself may occur.
2. Provide a cover to minimize the risk of
human injury.
When a driven object or moving parts of a
cylinder may cause the risk of human injury,
design a structure to avoid contact with human
body.
3. Securely tighten all stationary parts and
connected parts of cylinders so that they will
not become loose.
Tighten cylinders securely especially when they
are used in high frequency or in locations where
direct vibration or impact shock, etc. will be
applied to the body of the cylinder.
4. Deceleration circuits or shock absorbers are
needed in some cases.
If a driven object travels at a high speed or is
heavy, impact will not be sufficiently absorbed
only with the cylinder cushion. In such cases,
use a circuit to decelerate the cylinder speed
before the cushion becomes effective or use
external shock absorbers to reduce impact. At
this time, take the rigidity of machinery into
account.
5. Consider possible drop of pressure in circuit
due to power outage.
For cylinders used in clamping mechanism, a
work may become loose due to less clamping
force by pressure drop in circuit at the time of
power outage. Install safety devices to prevent
human injury and machinery damage. Measures
should be taken to prevent drop of hanging or
lifing equipment.
6. Consider possible loss of power sources.
Measures should be taken to protect against
human injury and machinery damage in the
event that there is a loss of air pressure,
electricity or hydraulic power.
7. Design circuit to prevent shooting out of a
driven object.
A driven object is quickly shot out when pressure
is supplied from one side of the piston after air in
the cylinder is exhausted in such cases that
cylinder is actuated by exhaust center type of
directional control valve or started after residual
air is exhausted from the circuit. At this time,
human injury may occur; e.g., by catching hands
or feet in the machinery, or damage to the
machinery itself may occur. Therefore, the
machine should be designed and constructed to
prevent shooting out.
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