Northern Airborne Technology LD12 - Manual (Page 8)

LD12 Lamp Dimmer Manual SM15 Rev. 4.00
Page 1-2 Nov 21,2003
ENG-FORM: 800-0106.DOT
CONFIDENTIAL AND PROPRIETARY TO NORTHERN AIRBORNE TECHNOLOGY LTD.
1.4 Specifications
1.4.1 Electrical Specifications
Input Power +24.8 Vdc to +30 Vdc, +27.5 Vdc nominal
(reverse and over voltage protection)
Input Current
50 mA idle (2 A max.)
Inputs:
Test Keyline Active low input. Grounding this pin will cause
all lamps to illuminate at full brightness. This
feature allows the user to check for faulty
filaments.
Dimmer Active low input. Grounding this pin will cause
the internal preset dimmer voltage to be
supplied to all lamps.
Dimmer GND Provides a convenient ground return for the
dimmer controls.
Lamp Pwr In Direct connection to internal lamp bus.
Lamp Keys Active low keyline. Grounding this pin will
cause the selected lamp to illuminate. Current
drawn will depend on type of lamp used in
circuit. Pin should be left open when unused.
Outputs
Lamp Outputs 0 mA to 50 mA of current to 2 floating lamp
circuits and 10 ground keyed circuits for system
annunciators. Recommended lamps: Type 327,
387 or 388 for 28V operation @ 40 mA each.
Dimmer Out Direct connection to dimmer circuit output.
Provides up to 1 A of current.