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Appendix B
Specifications
77
Item
Specifications
Bar graph display
2 to 255 dots; +/– area display;% display capability
Overlapping screens
Overlapping of a maximum of 8 registered screens is possible.
Continuous screens
Scrolling the display for a maximum of 8 registered screens is possible.
No. of registered screens
250 max.
Screen registration method
Transfer to the PT data created at IBM PC/AT compatible, or mount EPROM chip
containing data.
Screen saving method
Can be saved to SRAM (with backup battery), EEPROM or EPROM.
Screen attribute settings
Alarm, continuous buzzer, intermittent buzzer, function key bit input, touch switch bit
input, display history, 10-key, backlight
Data Quantities
Item
Specifications
Mark data
64 max.
String data
32 characters (standard size characters) x 32 strings max.
Numeral data
8 digits x 128 values max.
Switches
Switches and lamps combined: 256 max.
Lamps
(There is no limit when Host Link direct connection is used.)
Special Features
Item
Specifications
Alarm output
Relay output on rear terminal block.
Rating: NT20M:
1 A at 24 VDC
NT2000M:
1 A at 24 VDC
Output condition: NO contact (Closes when a command is received from the host or
when there is a screen called with an alarm-ON specification.)
Host RUN input
Photocoupler input on rear terminal block.
Rating 24 VDC
+10%
/
–15%
When this input goes OFF, the PT will display “host error” regardless of other conditions.
Buzzers
Two types: Continuous sound and intermittent sound.
ON:
The buzzer will sound when a command is received from the host, or when
a screen with a buzzer-ON specification is called.
OFF:
The buzzer is turned OFF when the Buzzer Key is pressed, when a
command is received from the host, or when a screen without a buzzer-ON
specification is displayed.
Sound pressure:
80 dB min./87 dB average (Measured at 10 cm from front panel.)
Enabled/disabled (NT2000M only):
The buzzer sound can be enabled or disabled
by means of a setting pin. If it is disabled, the buzzer will not sound under
any conditions.
Maintenance functions
Self-test for memory, switches, etc.
Status setting confirmation for communications and other conditions.
Simple communications confirmation.
Battery backup
Data backed up by lithium battery when screen data memory is SRAM.
Data backup time:
5 years (at 25
°
C)
If there is a voltage drop, the BAT LOW indicator on the front panel will light and the
Battery Low Flag to the host will turn ON.
The battery can be replaced from the rear of the Terminal while power is on.
Key input sound setting
If Key Input Sound is set to ON in the Memory Switch Menu, a beep will sound for 0.2 s
when a system key, function key, or touch switch is pressed.