1-2SectionFunctions of the NT21, NT31/NT31C and NT631/NT631C
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1-2 Functions of the NT21, NT31/NT31C and NT631/NT631C
The NT21, NT31/NT31C and NT631/NT631C have the following features.
1-2-1 Features
Slim Construction
• The PT is slimmer but retains the same functions. The depth is 50 mm max.
when mounted in a panel with the recommended thickness (1.6 to 4.8 mm.)
• The communication cable connectors are housed in the unit so that they do not
protrude from the unit.
Ideal Construction for an FA Environment
• NT21-ST121-E: STN monochrome LCD with backlight
• NT31-ST123-EV3: STN monochrome LCD with backlight
• NT31C-ST143-EV3: STN color LCD with backlight
• NT631-ST211-EV2: High-contrast EL display
• NT631C-ST141-EV2: STN color LCD with backlight
• NT631C-ST153-EV3: TFT color bright LCD with backlight
• The backlight unit and battery can be replaced onsite. (The backlight on the
NT21 cannot be replaced.)
• Degree of protection equivalent to IP65F with oil resistance (See note.), water
resistance equivalent to NEMA4
Note The panel can not be used in some IP65F environments requiring long-term ex-
posure to oil.
320 dots
240 dots
Wide angle of visibility
NT31/NT31C
NT631/NT631C
640 dots
480 dots
260 dots
140 dots
Wide angle of visibility
NT21
On the NT31, NT31C, and NT631C, the contrast and brightness are adjustable
by touch switch operations. (These features are not supported on NT631 mod-
els and NT631C-ST153-EV3.) On the NT21, the contrast is adjustable by
switch operations on the back panel.
Compatibility with Other PTs
• There is upward compatibility between the following models for screen data
and user programs: NT20S, NT30, NT30C, NT600S, NT21, NT31, NT31C
NT610G, NT610C, NT620S, NT620C, NT625C, NT631, NT631C. (After being
read to the Support Tool, screens must be modified in accordance with the
screen size. Depending on the function used, partial modification of programs
may also be necessary. For details, refer to Appendix B Compatibility with
Screen Data of Other PT Models (page 435) and the Support Tool Operation
Manual.)
• The panel cut-out dimensions for the NT21 are the same as the dimensions for
the NT20S, the panel cut-out dimensions for the NT31/NT31C are the same as
the dimensions for the NT30/NT30C, and the panel cut-out dimensions for the
NT631/NT631C are the same as the dimensions for the NT625C.
Panel Contrast and
Brightness Adjustment
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