Routine Inspections - Omron CS1W-MC221 - 02-2008 Operation Manual

Routine Inspections

13-1 Routine Inspections
Inspection Points
Item
I/O Power Measure the voltage variations at the
Supply I/O power supply terminal block. Do
they meet the standards?
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 Unit exposed to direct sunlight?
Is there any accumulation of dust
(especially iron dust) or salts?
Is the Unit 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?
550
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.
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.
Inspection points Criteria
24 VDC: 20.4 to 26.4 VDC
0 to 55 C
10% to 90% RH (with no con-
densation)
It must not be exposed to
direct sunlight.
There must be none of these
present.
It must not be exposed to any
of these.
The Unit must not be
exposed to these.
The amount of shock or
vibration must be within the
acceptable ranges given in
the specifications.
There must be no noise.
Section 13-1
Remarks
With a voltage tester, check
between the terminals and
make sure that the power
supply falls within the
acceptable range.
With a thermometer, check
the ambient temperature
inside the panel and make
sure that it falls within the
acceptable range.
With a hygrometer, check the
ambient humidity inside the
panel and make sure that it
falls within the acceptable
range.
Shield the Unit from direct
sunlight.
Remove any accumulation of
dust (especially iron dust) or
salts and protect against
them.
Protect the Unit from water,
oil, and chemicals.
Check for smells or use a gas
sensor.
Install a cushion or other
device to reduce shock and
vibration.
Remove the Unit from the
noise source or apply
countermeasures.