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9 MAINTENANCE AND INSPECTION
9.2 Periodic Inspection
9.2 Periodic Inspection
This section describes items that must be inspected one or two times every six months to one year. When the equipment has
been relocated or modified, or cable laying has been changed, inspect the module for the items.
Item Inspection item Inspection method Judgment criterion Corrective action
1 Environment Ambient
temperature
Measure the temperature by
using a thermometer.
0 to 55 Create the environment that
satisfies the judgment criterion.
Ambient humidity Measure the humidity by using a
hygrometer.
5 to 95%RH
Atmosphere Measure corrosive gases. No corrosive gases
2 Power supply voltage check Measure the voltage across
24VDC terminals.
20.4 to 28.8VDC Change the supply power.
3 Installation Mounting status on
a DIN rail
Check for a rattling noise of the
safety remote I/O module.
The safety remote I/O module
does not rattle.
Remount the safety remote I/O
module on the DIN rail securely.
Terminal block
condition
Check for attachment of dirt and
foreign matters.
Dirt and foreign matters must not
be attached to terminal blocks.
Remove dirt and foreign matters
from the terminal block and clean
it.
4 Connection
status
Terminal block
mounting screw
Check for the looseness of
terminal block mounting screws.
The terminal block mounting
screws must not be loose.
Retighten terminal block
mounting screws securely.
Clearance between
solderless
terminals
Check the clearance between
solderless terminals.
The proper clearance must be
provided between solderless
terminals.
Provide the proper clearance.
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