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Note If there is any key input or screen-change command while the backlight is off,
the backlight will turn on again.
4-10-2
Backlight Red/White
The backlight can be changed from white to red during operation. This is
possible for the following models: NT20M-DT13
j
/DN131 and
NT2000M-D
j
131.
4-10-3
Buzzer On/Off
The built-in buzzer can be turned on and off from the host. There are two
types of buzzers, continuous and intermittent. The buzzer also sounds when
a screen registered with the buzzer is displayed. The buzzer stops when the
Buzzer Key is pressed. The NT2000M allows for the buzzer to be disabled
when the setting pin is disabled.
4-10-4
Alarm Output On/Off
The ALM OUTPUT can be turned ON and OFF from the host. The ALM
OUTPUT terminal ON/OFF is also output when a screen registered for an
alarm is displayed, or when an error occurs. This terminal can be used for
large lamps or sound devices.
24 VDC
(COM)
ALM
OUTPUT
+
ALARM
OUTPUT
NT20M
NT2000M
4-10-5
HOST RUN INPUT
The HOST RUN INPUT detects when the host in not in RUN, and displays
the host error screen. Pin 2 of SW1 is used to enable and disable this input.
HOST
RUN
INPUT
Pin 2 of SW1 ON:
HOST RUN INPUT disable.
Pin 2 of SW1 OFF:
HOST RUN INPUT enable.
24 VDC
(COM)
+
NT20M
NT2000M
HOST
RUN
INPUT
4-10-6
Display History Clear
History data in the PT can be cleared (initialized) by the host. Until this oper-
ation is executed, history data continues to be registered.
Special Controls
Section 4-10