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xix
Operating Environment Precautions
4
!Caution
If the DIP switch settings have been changed when the NT20 is powered,
reset the power to the NT20. The changes with the DIP switches become
effective only after the power supply is reset.
4
Operating Environment Precautions
1,2,3...
1.
Do not install the PT in any of the following locations.
• Locations subject to rapid changes in temperature
• Locations subject to temperatures or humidity outside the range specified
in the specifications
• Locations subject to condensation as the result of high humidity
• Locations subject to splashing chemicals or solvents
• Locations subject to oil splashes
• Locations subject to corrosive or flammable gases
• Locations subject to strong shock or vibration
• Locations outdoors subject to direct wind and rain
• Locations subject to strong ultraviolet light
2.
Take appropriate and sufficient countermeasures when installing systems
in the following locations.
• Locations subject to static electricity or other forms of noise
• Locations subject to strong electromagnetic or magnetic fields
• Locations close to power supply lines
• Locations subject to possible exposure to radioactivity
5
Application Precautions
1,2,3...
1.
When unpacking the PT, check carefully for any external scratches or other
damage. Also, shake the PT gently and check for any abnormal sound.
2.
Turn OFF the power supply to the PT before mounting or dismounting any
Interface Unit, such as a Memory Unit. Correctly mount the Interface Unit
according to the NT20 User's Manual.
3.
Do not touch PCBs with bare hands. Discharge static electricity accumu-
lated in your body in advance.
4.
The mounting panel must be between 1.6 and 4.8 mm thick. Tighten the
Mounting Brackets evenly to a torque of between 0.5 and 0.6 N·m to main-
tain water and dust resistance. Make sure the panel is not dirty or warped
and that it is strong enough to hold the PT.
5.
Do not let metal particles enter the PT when preparing the panel.
6.
Do not perform a dielectric voltage test on the PT.
7.
Use a DC power supply that is isolated between DC output and AC input,
and has minimal fluctuation voltage.
Rated power supply voltage: 24 VDC (Allowable range: 20.4 to 27.6 VDC)
Capacity: 10 W min.
8.
Use a twisted-pair cable of at least 2 mm
2
to connect to the power supply
terminals. Tighten the terminal screws to 0.8 N·m. Make sure the screws
are properly tightened.
9.
Turn OFF the power supply to the PT before connecting or disconnecting
cables between devices.
Summary of Contents for NT20
Page 1: ...Programmable Terminal Cat No V091 E1 01 NT20 USER S MANUAL ...
Page 2: ...NT series Programmable Terminal User s Manual Produced March 2007 ...
Page 3: ...iv ...
Page 5: ...vi ...
Page 9: ...x TABLE OF CONTENTS ...
Page 15: ...xvi ...
Page 21: ...xxii EC Directives 6 ...
Page 37: ...16 Before Operating Section 1 6 ...
Page 153: ...132 Transferring the Resource Data Section 3 11 ...
Page 185: ...164 Numeral Setting Section 4 8 ...
Page 267: ...246 Key to Programs Section 6 8 ...
Page 281: ...260 Specifications Appendix A ...
Page 285: ...264 Transporting and Storing PTs Appendix C ...
Page 303: ...282 Function Restrictions Depending on the Support Tool Appendix I ...
Page 307: ...286 Index ...
Page 309: ...288 Revision History ...