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6F3B0253
278 T1-16S User’s Manual
9. Maintenance and Checks
9.3 Periodic checks
Check the T1-16S based on the following items every six months. Also perform
checks when the operating environment is changed.
Item Check Criteria
Measure the power voltage at the T1-
16S’s power terminals.
85 - 132/170 - 264Vac (AC PS)
20.4 - 28.8Vdc (DC PS)
Check that the terminal screw is not
loose.
Not loose
Power supply
Check that the power cable is not
damaged.
Not damaged
Check that the unit is installed
securely.
Not loose, no play
Check that the I/O module is inserted
securely. (if any)
Not loose, no play
Check that the expansion rack/unit is
installed securely. (if any)
Not loose, no play
Check that the expansion cable is
connected securely and the cable is
not damaged. (if any)
Not loose, not damaged
Installation
condition
Check that the I/O module on the
expansion rack is inserted securely. (if
any)
Not loose, no play
Measure the input/output voltage at
the T1-16S’s terminals.
The voltage must be within the
specified range.
Check the input status LEDs. The LED must light normally.
Check the output status LEDs. The LED must light normally.
Check that the terminal block is
installed securely.
Not loose, no play
Check that the terminal screw is not
loose and the terminal has a sufficient
distance to the next terminal.
Not loose, not contacting the
next terminal
Input/output
Check that the each I/O wire is not
damaged.
Not damaged
!
CAUTION
1. Pay special attention during the maintenance work to minimize the risk
of electrical shock.
2. Turn off power immediately if the T1-16S or related equipment is
emitting smoke or odor. Operation under such situation can cause fire
or electrical shock.