Omron CS1W-MC221 -, Operation Manual

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Routine Inspections Section 13-1
13-1 Routine Inspections
In order for your MC Unit to continue operating at optimum condition, periodic
inspections are necessary. The main components of the Unit are semiconduc-
tors and have a long service life, but depending on the operating environment,
there may be more or less deterioration of these and other parts. A standard
inspection schedule is once every six months to one year. More frequent
inspections may be advisable depending on the operating environment. Main-
tain the inspection schedule once it has been set.
Inspection Points Check to be sure that the power supply, ambient temperature, humidity, and
other specifications are within the specifications. Be sure that these are no
loose screws and that all battery and cable connections are secure. Clean any
dust or dirt that has accumulated.
Item Inspection points Criteria Remarks
I/O Power
Supply Measure the voltage variations at the
I/O power supply terminal block. Do
they meet the standards? 24 VDC: 20.4 to 26.4 VDC With a voltage tester, check
between the terminals and
make sure that the power
supply falls within the
acceptable range.
Environment
conditions Is the ambient temperature within the
acceptable range? (When used in a
panel, the ambient temperature inside
the panel must be checked.) 0 to 55
°
C With a thermometer, check
the ambient temperature
inside the panel and make
sure that it falls within the
acceptable range.
Is the ambient humidity within the
acceptable range? (When used in a
panel, the ambient humidity inside the
panel must be checked.) 10% to 90% RH (with no con-
densation) With a hygrometer, check the
ambient humidity inside the
panel and make sure that it
falls within the acceptable
range.
Is the Unit exposed to direct sunlight? It must not be exposed to
direct sunlight. Shield the Unit from direct
sunlight.
Is there any accumulation of dust
(especially iron dust) or salts? There must be none of these
present. Remove any accumulation of
dust (especially iron dust) or
salts and protect against
them.
Is the Unit exposed to any spray of
water, oil, or chemicals? It must not be exposed to any
of these. Protect the Unit from water,
oil, and chemicals.
Is the location subject to corrosive or
flammable gases? The Unit must not be
exposed to these. Check for smells or use a gas
sensor.
Is the location subject to shock or
vibration? The amount of shock or
vibration must be within the
acceptable ranges given in
the specifications. Install a cushion or other
device to reduce shock and
vibration.
Is the location near any source of
noise? There must be no noise. Remove the Unit from the
noise source or apply
countermeasures.