Omron CJ1W-ETN21 operation manual Inspections, Items, Tools Required for Inspection

Models: CJ1W-ETN21

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Appendix F

Inspections

Carry out regular inspections to ensure the Ethernet Unit is functioning perfectly.

Items

Most of the parts that make up an Ethernet Unit are semiconductor components. None of the parts in the Unit will wear out after a specific lifetime, but some parts may deteriorate due to extreme operating condition. Therefore, it is important to inspect the Unit regularly.

Inspection Interval

Normally inspect once or twice per year. Choose the inspection period according to the severity of the operat- ing conditions.

Inspection Items

Correct any of the items in the table below not conforming to the specified standard.

Item

Details

Standard

 

 

 

Environment

Temperature around Unit

0 to 55°C

 

 

 

 

Humidity around Unit

10% to 90% (with no condensation)

 

 

 

 

Accumulated dust

No accumulated dust

 

 

 

Mounting

Ethernet Unit firmly attached

No looseness

 

 

 

 

Transceiver cable connector fully pushed in

No looseness

 

 

 

 

Condition of transceiver cable

No visible abnormality

 

 

 

 

Twisted-pair cable connector fully pushed in

No looseness

 

 

 

 

Condition of twisted-pair cable

No visible abnormality

 

 

 

Tools Required for Inspection

The following tools are needed to inspect the Ethernet Unit:

Standard Tools

Flat-blade and Phillips screwdrivers

Tester or digital voltmeter

Industrial alcohol and a clean cloth

Tools Required Under Special Circumstances

Synchroscope

Pen oscilloscope

Thermometer and hygrometer

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Page 229
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Omron CJ1W-ETN21 operation manual Inspections, Items, Tools Required for Inspection