Unit Replacement Precautions - Omron NX Series Hardware User Manual

7 Inspection and Maintenance
Inspec-
No.
tion item
4 Installa-
tion and
wiring
5 User-
servicea-
ble parts
Tools Required for Inspections
l Required Tools
• Flat-blade screwdriver
• Phillips screwdriver
• Voltage tester or digital multimeter
• Industrial alcohol and pure cotton cloth
• Antistatic gas duster
l Tools Required Occasionally
• Oscilloscope
• Thermometer and hygrometer
7-1-3

Unit Replacement Precautions

If you find any faulty Unit after check, replace the Unit according to the following points.
• Do not replace a Unit until the power is turned OFF.
• Check the new Unit to make sure that there are no errors.
• If you return a faulty Unit for repair, describe the problem in as much detail as possible, enclose this
description with the Unit before returning it.
• 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.
7-4
Inspection details
Check that the DIN Track
mounting hooks on all
Units are securely locked.
Check that cable connec-
tors are fully inserted and
locked.
Check that the screws on
the End Plates (PFP-M) are
tight.
Check that each Unit is
connected along the hook-
up guides, and fully insert-
ed until it contacts the DIN
Track.
Check for damaged exter-
nal wiring cables.
Battery Set
CJ1W-BAT01
Check whether the battery
has reached its service life.
Criteria
No looseness Securely lock the DIN Track mounting
hooks.
No looseness Correct any improperly installed connec-
tors.
No looseness Tighten loose screws with a Phillips-head
screwdriver.
The Units must be Connect each Unit along the hookup
connected and se- guides, and insert each Units until it con-
curely in place on tacts the DIN Track.
the DIN Track.
No visible damage Check visually and replace cables if nec-
essary.
Service life expect- Replace the battery when its service life
ancy is 5 years at has passed even if a battery error has not
25°C. occurred. (Battery life depends upon the
Depending on model, and ambient conditions.) Refer to
model and ambi- 7-2 Replacing the Battery on page 7-6
ent temperature. for the service life of individual model.
NX-series NX502 CPU Unit Hardware User's Manual (W629)
Correction