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NT20, NT31(C)-EV3, NT631C-EV3

Programmable Terminals

NT20, NT31(C)-EV3, NT631C-EV3

Better Compatibility and Easier-to-use Support Software

NT631C

General Specifications

Model NT631C-ST153(B)-EV3
Rated power supply voltage 24 VDC
Allowable power supply voltage range 20.4 to 26.4 VDC (24 VDC -15%/+10%)
Power consumption 18 W max.
Ambient operating temperature 0 to 50 °C
Storage temperature -20 to 60 °C
Ambient operating humidity 35% to 85% (with no condensation)
Ambient operating environment No corrosive gases
Noise immunity Conforms to IEC 61000-4-4 at 2 kV (power supply line).
Vibration resistance (during operation) 5 to 9 Hz, single amplitude: 3.5 mm
9 to 150 Hz, 9.8 m/s2
10 times (1 octave/min) each in X, Y, and Z directions
Shock resistance (during operation) 147 m/s2, 3 times each in X, Y, and Z directions
Weight 2.5 kg max.
Degree of protection (front panel) Equivalent to IP65 oil-proof type and NEMA4 *

* The equipment cannot be used for long periods of time in locations which expose the panel to spills of oil.

Display/Panel Specifications

Model NT631C-ST153(B)-EV3
Display Display device Color TFT LCD
Number of dots (resolution) 640 dots (horizontal) × 480 dots (vertical)
Effective display area 211 × 158 mm (10.4 inches)
Display color 8 colors (intermediate colors can be displayed in tiling patterns)
Service life 50,000 hours (until contrast is reduced by 50%)
Automatic turn-OFF 1 to 255 minutes/None
Backlight Service life (when brightness is set
to high)
50,000 hours min. *
LED POWER Green Lit while power is being supplied.
RUN Green Lit during operation
Orange Lit when the battery voltage is low (when operating)
Red Lit when the battery voltage is low (when stopped)

* The time until brightness is reduced by half, under normal temperature and normal humidity.

Operation Specifications

Model NT631C-ST153(B)-EV3
Touch panel Number of switches 768 (32 × 24)
Input Pressure sensitive
Operating force 1 N max.
Service life 1,000,000 operations min.

External I/F Specifications

Model NT631C-ST153(B)-EV3
Serial communications Serial port A Conforms to EIA RS-232C.
D-sub 9-pin connector (female)
+5 V (250 mA max.) output at pin No. 6
Serial port B EIA RS-232C, (RS-422A/485 selectable by memory switch setting)
RS-232C: D-sub 9-pin connector (female)
RS-422A/485: Terminal block (6 terminals)
Parallel I/F Conforms to Centronics specifications, 20-pin half-pitch connector
Expansion I/F Dedicated connector

Display Specifications

Model NT631C-ST153(B)-EV3
Display
elements
Character displays (fixed
display)
65,535 per screen (including marks)
Graphic displays
Character string displays Up to 256 per screen (40 bytes (40 characters) per string)
Numerical displays 256 per screen, max. 10-digit display (2 words)
Bar graph displays Up to 50 per screen, percentage display and sign display are possible.
Analogue meter Up to 50 per screen, percentage display and sign display are possible.
Trend graphs One frame per screen, 50 graphs per frame (only 8 graphs per frame with
data logging)
Broken line graphs One frame per screen, 256 graphs per frame, 512 points per graph
Lamps Up to 256 per screen
Image library displays Up to 256 per screen
Touch switches Up to 256 per screen, Max. overlap: 256 mesh
Numeral inputs Up to 256 per screen
Thumbwheel switches
Character string inputs Up to 256 per screen
Alarm lists Up to 4 groups per screen
Alarm histories
Screen
types
Normal screen The normal screen display
Overlapping screens A maximum of 8 registered screens can be displayed overlapped with each
other.
Window screens Up to 3 screens (2 local windows and 1 global window) can be displayed at
the same time.
Display history screens Order of occurrence (max. 1,024 screens), order of frequency (max. 255
times)
Screen attributes Buzzer, display history, background color, backlight, keyboard screen number
Number
of
screens
Max. number of registered
screens
3,999 screens
Screen No. 0: No display
1 to 3999: User-registered screens
9000: "Initializing system" screen
9001: Display history (occurrence order) screen
9002: Display history (frequency order) screen
9020: Programming Console function screen
9999: Return to the previous screen
9021 to 9023: Device monitor
Screen registration method By transmitting screen data created using the Support Tool to the NT631C
By transmitting screen data stored in a memory unit to the NT631C
Screen saving method Flash memory (screen data memory in the PT)

Display Element Specifications

Model NT631C-ST153(B)-EV3
Display characters Half-size characters (8 × 8 dots): Alphanumerics and symbols
Normal-size characters (8 × 16 dots): Alphanumerics and symbols
Mark data (16 × 16 dots): User defined picture characters
Enlargement function Normal size, double width, double height, and magnifications of 4X, 9X, 16X, 64X
Smoothing processing Available for enlarged characters with magnification of 4X or greater (excluding marks)
Character display attribute Normal, reverse, flashing, reverse and flashing, transparent
Image data Variable-size pictograph
Size: Min. 8 × 8 dots, Max. 640 × 480 dots
The size can be set in 8-dot units.
It is not possible to set enlarged display, smoothing processing, or display attributes such
as reverse/flashing.
Library data Combination of any characters and graphics
Size: Min. 1 × 1 dots, Max. 640 × 480 dots
Any size can be set.
Enlarged display, smoothing processing, and display attributes such as reverse/flashing
are displayed according to the setting registered.
Graphics Polyline, circle, arc, fan, square, polygon
Line type Solid line, dotted line, alternate long and short dash, long and two short dashes (only
polylines for other than solid lines)
Tilling 10 types
Graphic display attribute Normal, flashing, reverse, reverse flashing
Display colors 8 colors (black/blue/red/purple/green/light blue/yellow/white)

Data Capacities

Model NT631C-ST153(B)-EV3
Screen data capacity 1 MB
Numeric memory table 2 words x up to 2,000 (1,000 tables can be backed up with battery)
Character string
memory table
40 normal-size characters x up to 2,000 (Data can be written to and read from 500 tables)
Bit memory table 1 bit × 1,000
Mark data 224 (16-by-16-dot basis)
Image data 4,095 items
Library data 12,288 items

NT31/NT31C

General Specifications

Model NT31-ST123(B)-EV3/NT31C-ST143(B)-EV3
Rated power supply voltage 24 VDC
Allowable power supply voltage range 20.4 to 26.4 VDC (24 VDC -15%/+10%)
Power consumption 15 W max.
Ambient operating temperature 0 to 50 °C
Storage temperature -20 to 60 °C
Ambient operating humidity 35% to 85% (with no condensation)
Ambient operating environment No corrosive gases
Noise immunity Conforms to IEC 61000-4-4 at 2 kV (power supply line).
Vibration resistance (during operation) 5 to 9 Hz, single amplitude: 3.5 mm
9 to 150 Hz, 9.8 m/s2
10 times (1 octave/min) each in X, Y, and Z directions
Shock resistance (during operation) 147 m/s2, 3 times each in X, Y, and Z directions
Weight 1 kg max.
Degree of protection (front panel) Equivalent to IP65 oil-proof type and NEMA4 (See note.)

Note: The equipment cannot be used for long periods of time in locations which expose the panel to spills of oil.

Display/Panel Specifications

Model NT31-ST123(B)-EV3 NT31C-ST143(B)-EV3
Display Display device Monochrome STN LCD Color STN LCD
Number of dots (resolution) 320 dots (horizontal) × 240 dots (vertical)
Effective display area 118.2 × 89.4 mm (5.7 inches)
Display color Black/White (2 colors) 8 colors (intermediate colors can be
displayed in tiling patterns)
Service life 50,000 hours (until contrast is reduced by 50%)
Automatic turn-OFF 1 to 255 minutes/None
Contrast adjustment 100 levels of adjustment possible using the front touch panel
Backlight Service life (when brightness
is set to high)
50,000 hours min. (See note.)
Brightness adjustment 3 levels of adjustment possible using the front touch panel
LED POWER Green Lit while power is being supplied
RUN Green Lit during operation
Orange Lit when the battery voltage is low (when operating)
Red Lit when the battery voltage is low (when stopped)

Note: The time until brightness is reduced by half, under normal temperature and normal humidity.

Operation Specifications

Model NT31-ST123(B)-EV3/NT31C-ST143(B)-EV3
Touch panel Number of switches 192 (16 × 12)
Input Pressure sensitive
Operating force 1 N max.
Service life 1,000,000 operations min.

External I/F Specifications

Model NT31-ST123(B)-EV3/NT31C-ST143(B)-EV3
Serial
communications
Serial port A Conforms to EIA RS-232C
D-sub 9-pin connector (female)
+5 V (250 mA max.) output at pin No. 6
Serial port B EIA RS-232C (RS-422A/485 selectable by memory switch setting)
D-sub 25-pin connector (female)
Parallel I/F Conforms to Centronics specifications, 20-pin half-pitch connector
Expansion I/F Dedicated connector

Display Specifications

Model NT31-ST123(B)-EV3/NT31C-ST143(B)-EV3
Display
elements
Character displays
(fixed display)
65,535 per screen (including marks)
Graphic displays
Character string displays Up to 256 per screen (40 bytes (40 characters) per string)
Numerical displays 256 per screen, max. 10-digit display (2 words)
Bar graph displays Up to 50 per screen, percentage display and sign display are possible.
Analogue meter Up to 50 per screen, percentage display and sign display are possible.
Trend graphs One frame per screen, 50 graphs per frame
(only 8 graphs per frame with data logging)
Broken line graphs One frame per screen, 256 graphs per frame,
320 points per graph
Lamps Up to 256 per screen
Image library displays Up to 256 per screen
Touch switches Up to 256 per screen, Max. overlap: 256 mesh
Numeral inputs Up to 256 per screen
Thumbwheel switches
Character string inputs Up to 256 per screen
Alarm lists Up to 4 groups per screen
Alarm histories
Screen
types
Normal screen The normal screen display
Overlapping screens A maximum of 8 registered screens can be displayed overlapped with each other.
Window screens Up to 3 screens (2 local windows and 1 global window) can be displayed at the
same time.
Display history screens Order of occurrence (max. 1,024 screens), order of frequency (max. 255 times)
Screen attributes Buzzer, display history, background color, backlight, keyboard screen number
Number
of
screens
Max. number of
registered screens
3,999 screens
Screen No. 0: No display
1 to 3999: User-registered screens
9000: "Initializing system" screen
9001: Display history (occurrence order) screen
9002: Display history (frequency order) screen
9020: Programming Console function screen
9999: Return to the previous screen
9021 to 9023: Device monitor
Screen registration method By transmitting screen data created using the
Support Tool to the NT31/NT31C
By transmitting screen data stored in a memory
unit to the NT31/NT31C (automatic/manual)
Screen saving method Flash memory (screen data memory in the PT)

Display Element Specifications

Model NT31-ST123(B)-EV3 NT31C-ST143(B)-EV3
Display characters Half-size characters (8 × 8 dots): Alphanumerics and symbols
Normal-size characters (8 × 16 dots): Alphanumerics and symbols
Mark data (16 × 16 dots): User defined picture characters
Enlargement function Normal size, double width, double height, and magnifications of 4X, 9X, 16X, 64X
Smoothing processing Available for enlarged characters with magnification of 4X or greater (excluding marks)
Character display attribute Normal, reverse, flashing, reverse and flashing, transparent
Image data Variable-size pictograph
Size: Min. 8 × 8 dots, Max. 320 × 240 dots
The size can be set in 8-dot units.
It is not possible to set enlarged display, smoothing processing, or display attributes such
as reverse/flashing.
Library data Combination of any characters and graphics
Size: Min. 1 × 1 dots, Max. 320 × 240 dots
Any size can be set.
Enlarged display, smoothing processing, and display attributes such as reverse/flashing
are displayed according to the setting registered.
Graphics Polyline, circle, arc, fan, square, polygon
Line type Solid line, dotted line, alternate long and short dash, long and two short dashes (only
polylines for other than solid lines)
Tilling 10 types
Graphic display attribute Normal, flashing, reverse, reverse flashing
Display colors 2 colors (black/white) 8 colors (black/blue/red/purple/ green/
light blue/yellow/white)

Data Capacities

Model NT31-ST123(B)-EV3/NT31C-ST143(B)-EV3
Screen data capacity 1 MB
Numeric memory table 2 words x up to 2,000 (1,000 tables can be backed up with battery)
Character string memory table 40 normal-size characters x up to 2,000 (Data can be written to and read from 500 tables)
Bit memory table 1 bit × 1,000
Mark data 224 (16-by-16-dot basis)
Image data 4,095 items
Library data 12,288 items

NT20

General Specifications

Model NT20-ST121(B)/128(B)
Rated power supply voltage 24 VDC
Allowable power supply voltage range 20.4 to 27.6 VDC (24 VDC -15%/+10%)
Allowable power interruption time Not specified
Power consumption 10 W max.
Ambient operating temperature 0 to 50 °C *1 (with no condensation)
Storage temperature -20 to 70 °C
Ambient operating humidity 35% to 85 % (0 to 40 °C)
35% to 50 % (40 to 50 °C) (with no condensation)
Ambient storage humidity 35% to 85 % (-20 to 40 °C)
35% to 50 % (40 to 50 °C)
35% to 45 % (50 to 70 °C) (with no condensation)
Ambient operating environment No corrosive gases
Noise immunity Conforms to IEC 61000-4-4 at 2 kV (power supply line).
Vibration resistance
(during operation)
5 to 9 Hz, single amplitude: 3.5 mm
9 to 150 Hz, 9.8 m/s2
10 times (1 octave/min) each in X, Y, and Z directions
Shock resistance (during operation) 147 m/s2 , 3 times each in X, Y, and Z directions
Dimensions 190 × 108 × 53.5 mm (W × H × D)
Panel cutout dimensions 178.5 + 0.50 × 98.5 + 0.50 mm (horizontal × vertical)
Panel thickness: 1.6 to 4.8 mm
Weight 0.7 kg max.
Degree of protection Front panel operating section: Equivalent to IP65 oil-proof type and NEMA 4. *2
Applicable standards UL 1604 Class 1 Division 2, EC Directives

*1. The display quality (e.g., contrast) will deteriorate at temperatures above 40°C. At low temperatures, the response
       speed will be reduced due to the characteristics of liquid crystal.
*2. The NT631/NT31/NT20 may not be able to be used in locations subject to long-term oil exposure.

Display/Panel Specifications

Item Specifications
Display *1 Display device Monochrome STN LCD
Number of dots
(resolution)
140 (128) × 260 (256) dots (horizontal × vertical)
Dot size: 0.42 mm
The number of dots that can be used in NT20 system programs is indicated in
parentheses.
Effective display area 66 (57.6) × 120 (115.2) mm (horizontal × vertical)
The effective display area that can be used with NT20 system programs is
indicated in parentheses.
Display mode Blue mode
Service life 50,000 hours min.
Contrast adjustment The contrast can be adjusted from the back of the PT.
Backlight Service life 50,000 hours min. *2
Replacement Cannot be replaced.
Brightness adjustment Cannot be set.
Automatic turn-OFF Can be set to either 10 minutes, 1 hour, or lit.
Front-panel
indicator
LED
RUN Lit green: Normal operation with Memory Unit automatic transfer completed.
Flashing green: Executing Memory Unit automatic transfer or automatic transfer
error.

*1. There are sometimes faulty in the touch panel, but this does not indicate an error as long as the number of bright or
       dark pixels does not exceed the following limits.
       4 total bright or dark defects maximum of the following size with no more than one per 20-mm square: 0.2 mm <
       (short dia. + long dia.)/2 < 0.55 mm
*2. This time is only a guide to the half-life of luminescence at room temperature and standard humidity.
       The service life will be dramatically reduced in low-temperature environments. For example, the service life at 0°C or
       less is approximately 10,000 hours (reference value).

Operation Specifications

Item Specifications
Touch panel Number of switches: Up to 72 registered per screen (12 × 6 (horizontal × vertical))
Switch size: 9.14 × 9.18 mm (horizontal × vertical)
Input: Pressure sensitive
Operating force: 1 N max.
Service life: 1,000,000 operations min.

External I/F Specifications

Model NT20-ST121(B)
Serial communications Serial port A Conforms to EIA RS-232C.
D-sub 9-pin connector (female)
+5 V (150 mA max.) output at pin No. 6
The +5 V output, however, cannot be used simultaneously at ports A and B.
Serial port B EIA RS-232C
D-sub 9-pin connector (female)
+5 V (150 mA max.) output at pin No. 6
The +5 V output, however, cannot be used simultaneously at ports A and B.
Expansion I/F Dedicated connector

Display Specifications

Item Specifications
Host Link, NT Link, or C200H
Direct Communications
Memory Link (RS-232C)
Communications
Display
elements
Display characters Fixed displays (character strings registered for each screen)
Character string
displays
32 per screen 128 per file, 32 per screen
Numeric displays * 50 per screen max., 8-digit display
Bar graph displays * 50 per screen
Graphic displays Any position
Lamps 128 per screen 256 max. per file
Touch switches 72 per screen 256 max. per file
Numeral settings Numeral setting display (8 digits), 50 per screen
Screen
types
Normal screen The normal screen display
Overlapping screens A maximum of 8 registered screens can be displayed overlapped with each other.
Continuous screens Switch among up to 8 screens (Use ↑ and ↓ touch switch keys to switch screens.)
Screen attributes Buzzer, numeral settings, backlight Buzzer, numeral settings, backlight, bit inputs
Number of screens 495 screens max.
Screen registration method By transmitting screen data created using the Support Tool to the NT20
By transmitting screen data stored in a Memory Unit to the NT20 (automatic/manual)
Screen saving method
(image data memory)
Flash memory (specific NT20 format)

* No. of numeral table entries that can be used (No. of numeral displays used + No. of graphs used + No. of numeral
  settings) ≤128

Display Element Specifications

Item Specifications
Display characters Half-size characters (8 × 8 dots): Alphanumerics and symbols
Normal-size characters (8 × 16 dots): Alphanumerics and symbols
Mark data (16 × 16 dots): User defined picture characters
Enlargement function Double width, double height, and magnifications 4X, 9X, 16X
Smoothing processing Available for enlarged characters with magnification of 4X or greater
Character display attribute Normal, reverse, flashing, reverse and flashing
Graphics Polylines, circles

Data Capacities

Item Specifications
Host Link, NT Link, or C200H Direct Communications Memory Link (RS-232C) Communications
Character strings 32 characters × 128
Numeral data 8 digits × 128
Mark data 64
Touch switches No limit 256 per file max.
Lamps No limit 256 per file max.