Routine Inspections - Omron CS1W-NC113 Manual

Routine Inspections

12-2 Routine Inspections
Inspection Points
No. Item
1 I/O Power Measure the voltage variations at the
Supply I/O power supply terminal block. Do
they meet the standards?
2 Environment Is the ambient temperature within the
conditions acceptable range? (When used in a
panel, the ambient temperature inside
the panel must be checked.)
Is the ambient humidity within the
acceptable range? (When used in a
panel, the ambient humidity inside the
panel must be checked.)
Is the PCU exposed to direct sunlight?
Is there any accumulation of dust
(especially iron dust) or salts?
Is the PCU exposed to any spray of
water, oil, or chemicals?
Is the location subject to corrosive or
flammable gases?
Is the location subject to shock or
vibration?
Is the location near any source of
noise?
In order for your PCU to continue operating at optimum condition, periodic
inspections are necessary. The main components of the PCU 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 inspec-
tions may be advisable depending on the operating environment. Maintain the
inspection schedule once it has been set.
Inspection points Criteria
24 VDC: 20.4 to With a voltage tester,
26.4 VDC check between the
terminals and make sure
5 VDC: 4.75 to
that the power supply
5.25 VDC
falls within the
acceptable range.
0 to 55_C With a thermometer,
check the ambient
temperature inside the
panel and make sure
that it falls within the
acceptable range.
10% to 90% RH (with no With a hydroscope,
condensation) check the ambient
humidity inside the panel
and make sure that it
falls within the
acceptable range. In
particular, check that
there is no condensation
due to sudden changes
in temperature.
It must not be exposed Shield the PCU from
to direct sunlight. direct sunlight.
There must be none of Remove any
these present. accumulation of dust
(especially iron dust) or
salts and protect against
them.
It must not be exposed Protect the PCU from
to any of these. water, oil, and
chemicals.
The PCU must not be Check for smells or use
exposed to these. a gas sensor.
The amount of shock or Install a cushion or other
vibration must be within device to reduce shock
the acceptable ranges and vibration.
given in the
specifications.
There must be no noise. Remove the PCU from
the noise source or
apply countermeasures.
Section 12-2
Remarks
309