No.
Inspec-
tion item
Inspection details Criteria Correction
3 Ambient
environ-
ment
Is the ambient operating
temperature within stand-
ards?
0 to 55°C Use a thermometer to check the
temperature and ensure that the
ambient operating temperature re-
mains within the allowed range of 0
to 55°C.
Is the ambient operating hu-
midity within standards?
Relative humidity must
be 10% to 95%
with no condensation.
Use a hygrometer to check the hu-
midity and ensure that the ambient
operating humidity remains be-
tween 10% and 95%.
Make sure that condensation does
not occur due to rapid changes in
temperature.
Is it subject to direct sun-
light?
Not in direct sunlight Protect the Controller if necessary.
Is there an accumulation of
dirt, dust, salt, metal powder
,
etc.?
No accumulation
Clean and protect the Controller if
necessary.
Is there water, oil, or chemi-
cal sprays hitting the Control-
ler?
No spray Clean and protect the Controller if
necessary.
Are there corrosive or flam-
mable gases in the area of
the Controller?
No spray Check by smell or use a sensor
.
Is the Unit subject to shock
or vibration?
Vibration resistance
and shock resistance
must be within specifi-
cations.
Install cushioning or other vibration
and shock absorbing equipment if
necessary.
Are there noise sources near
the Controller?
No significant noise
sources
Either separate the Controller and
noise source or protect the Control-
ler.
4
Installa-
tion and
wiring
Are the DIN track mounting
hooks for each NX Unit se-
curely locked?
No looseness Securely lock the DIN track mount-
ing hooks.
Are the cable connectors
fully inserted and locked?
No looseness Correct any improperly installed
connectors.
Are there any loose screws
on the End Plates (PFP-M)?
No looseness Tighten loose screws with a Phil-
lips-head screwdriver
.
Are the NX Units connected
to each other along the
hookup guides and until they
touch the DIN track?
Y
ou must connect and
fix the NX Units to the
DIN track.
Connect the NX Units to each other
along the hookup guides and until
they touch the DIN track.
Are there any damaged ex-
ternal wiring cables?
No visible damage Check visually and replace cables if
necessary.
5
Safety
validation
testing
(user
testing)
Check to be sure that all
safety functions operate cor-
rectly.
All functions must op-
erate as intended.
Remove the cause of errors and
check the operation of all safety
functions again.
13 Inspection and Maintenance
13 - 3
NX-series Safety Control Unit User's Manual (Z930)
13-1 Cleaning and Inspection
13
13-1-2 Periodic Inspections
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