
Controls and Indicators
2-3
2000 March Rev. B 8754020
Figure 2-2. Local Panel Controls
9. Backlight Key – When system power is applied, the message display backlight
turns on and the Ready, Attention, and Alarm lights are enabled for use.
Press the Backlight key once to turn off the backlight.
Press the Backlight key a second time to disable the Ready, Attention, and
Alarm lights. The backlight remains off. (This is darkroom mode.)
Press the Backlight key a third time to return the backlight and the three
indicator lights to their original state (enabled for use).