Toshiba PROSEC T1-16S PLC User's Manual - CTi Automation

9. Maintenance and Checks
9.3 Periodic checks
! CAUTION
Check the T1-16S based on the following items every six months. Also perform
checks when the operating environment is changed.
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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.
Item Check Criteria
Power supply Measure the power voltage at the T1- 85 - 132/170 - 264Vac (AC PS)
16S’s power terminals.
20.4 - 28.8Vdc (DC PS)
Check that the terminal screw is not
loose.
Not loose
Check that the power cable is not
damaged.
Not damaged
Installation Check that the unit is installed Not loose, no play
condition securely.
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
Check that the I/O module on the
expansion rack is inserted securely. (if
any)
Not loose, no play
Input/output Measure the input/output voltage at The voltage must be within the
the T1-16S’s terminals.
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 Not loose, not contacting the
loose and the terminal has a sufficient
distance to the next terminal.
next terminal
Check that the each I/O wire is not
damaged.
Not damaged
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