Periodic Inspections - Omron NX1P2 Series Hardware User Manual

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Periodic Inspections

Although the major components in NX-series Controllers have an extremely long life time, they can
deteriorate under improper environmental conditions. Periodic inspections are thus required to ensure
that the required conditions are being kept.
Inspection is recommended at least once every six months to a year, but more frequent inspections
may be necessary depending on the severe environments.
Take immediate steps to correct the situation if any of the conditions in the following table are not met.
Periodic Inspection Items
Inspec-
No.
tion item
1 External
power
supply
2 I/O power
supply
3 Ambient
environ-
ment
NX-series NX1P2 CPU Unit Hardware User's Manual (W578)
Inspection details
Check for voltage fluctua-
tions at the power supply
terminals.
Check for voltage fluctua-
tions at the I/O terminals.
Check the ambient temper-
ature.
(Inside the control panel if
the Controller is in a control
panel.)
Check the ambient humidi-
ty.
(Inside the control panel if
the Controller is in a control
panel.)
Check that the Controller is
not in direct sunlight.
Check for accumulation of
dirt, dust, salt, metal pow-
der, etc.
Check for water, oil, or
chemical sprays hitting the
Controller.
Check for corrosive or flam-
mable gases in the area of
the Controller.
Check the level of vibration
or shock.
Check for noise sources
near the Controller.
7 Inspection and Maintenance
Criteria
The voltage must Use a voltage tester to check the power
be within the allow- supply at the terminals. Take necessary
able voltage fluctu- steps to bring voltage of the supplied
ation range. power to within the allowable voltage fluc-
tuation range.
Voltages must be Use a voltage tester to check the I/O
within specifica- power supply at the terminals. Take nec-
tions for each Unit. essary steps to bring voltage fluctuations
within limits.
0 to 55°C Use a thermometer to check the tempera-
ture and ensure that the ambient temper-
ature remains within the allowed range of
0 to 55°C.
Relative humidity Use a hygrometer to check the humidity
must be 10% to and ensure that the ambient operating
95% with no con- humidity remains between 10% and 95%.
densation. Make sure that condensation does not
occur due to rapid changes in tempera-
ture.
Not in direct sun- Protect the Controller if necessary.
light
No accumulation Clean and protect the Controller if neces-
sary.
No spray Clean and protect the Controller if neces-
sary.
No corrosive or Check by smell or use a gas sensor.
flammable gases
Vibration resist- Install cushioning or shock absorbing
ance and shock equipment if necessary.
resistance must be
within specifica-
tions.
No significant Either separate the Controller and noise
noise sources source or protect the Controller.
Correction
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