531
Inspections Section 12-1
Note The following table shows the allowable voltage fluctuation ranges for source
power supplies.
Tools Required for Inspections
Required Tools
• Slotted and Phillips-head screwdrivers
• Voltage tester or digital voltmeter
• Industrial alcohol and clean cotton cloth
Tools Required Occasionally
• Synchroscope
• Oscilloscope with pen plotter
• Thermometer and hygrometer (humidity meter)
12-1-2 Unit Replacement Precautions
Check the following after replacing any faulty Unit.
• Do not replace a Unit until the power is turned OFF.
• Check the new Unit to make sure that there are no errors.
• If a faulty Unit is being returned for repair, describe the problem in as
much detail as possible, enclose this description with the Unit, and return
the Unit to your OMRON representative.
• For poor contact, take a clean cotton cloth, soak the cloth in industrial
alcohol, and carefully wipe the contacts clean. Be sure to remove any lint
prior to remounting the Unit.
Note 1. When replacing a CPU Unit, be sure that not only the user program but
also all other data required for operation is transferred to or set in the new
CPU Unit before starting operation, including DM Area and HR Area set-
4 Installation and
wiring
Check that each Unit is con-
nected and locked to the next
Unit securely.
No looseness Press the connectors together
completely and lock them with the
sliders.
Check that cable connectors
are fully inserted and locked.
No looseness Correct any improperly installed
connectors.
Check for loose screws in
external wiring.
No looseness Tighten loose screws with a Phil-
lips-head screwdriver.
Check crimp connectors in
external wiring.
Adequate spacing between
connectors
Check visually and adjust if neces-
sary.
Check for damaged external
wiring cables.
No damage Check visually and replace cables if
necessary.
5 User-service-
able parts
Check whether the battery
has reached its service life.
CJ1 and CJ1-H CPU Units:
CJ1W-BAT01
CJ1M CPU Units:
CJ1W-BAT01 Battery
Service life expectancy is 5
years at 25°C, less at
higher temperatures.
(From 0.75 to 5 years
depending on model,
power supply rate, and
ambient temperature.)
Replace the battery when its ser-
vice life has passed even if a bat-
tery error has not occurred.
(Battery life depends upon the
model, the percentage of time in
service, and ambient conditions.)
Power Supply Unit Supply voltage Allowable voltage range
CJ1W-PA205R/PA205C 100 to 240 V AC 85 to 264 V AC
(+10%/−15%)
CJ1W-PA202
CJ1W-PD025 24 V DC 19.2 to 28.8 V DC (±20%)
CJ1W-PD022 21.6 to 26.4 V DC (±10%)
No. Item Inspection Criteria Action
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