TheLD12is a remote mounted light dimmer module that is designed for complicated annunciator requirements in Loran/GPS systems. It is capable of controlling 12 independent lamps with full test function. In its basic operation mode, the LD12 can function has a bulk lamp dimmer at one amp current capacity. Also, it can interface with RS-series remote switches from AEM that are used in Loran/GPS installations.
规格：
Weight:
0.84 lb (380 g)
Dimensions:
1.75 x 5 x 3.95 in (44.5 x 127 x 100.3 mm)
Input Power:
24.8 VDC to 30 VDC, (27.5 VDC nominal)
Input current:
50 mA, idle (2 A, max)
INPUT SIGNALS:
Test keyline:
Active low input. When grounded, this pin will cause all lamps to illuminate at full brightness, allowing the user to check for faulty filaments
Max. current source 10 mA
Input should be left floating when unused
Dimmer:
Active low input: Grounding this pin will cause the internal preset dimmer voltage to be supplied to all lamps
Dimmer GND:
Provides convenient ground return for the dimmer controls
Lamp pwr in:
Direct connection to internal lamp bus
Lamp keys:
Active low keyline. When grounded, the selected lamp will illuminate
Current drawn will depend on type of lamp used in circuit
Pin should be left open when unused
OUTPUT SIGNALS:
Lamp Outputs:
Provides up 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 28 Vdc operation @ 40 mA each
Dimmer Out:
Direct connection to dimmer circuit output
Provides up to 1 Amp of current
Temperature:
-15°C to 70°C, operating
-55°C to 85°C, storage
Altitude:
50,000 ft
Humidity:
95% non-condensing
Vibration:
DO-160C, Cat. B.M.N
特征：
Adjustable lamp dimmer provides 12 separate 28V lamp lines
Operates in preset mode at 12V – 24V or adjustable via an external remote control
Selectable day, night, and lamp test functions
Day mode provides regulated 24 VDD for all lamps — preventing early lamp failure from excessive voltage
Sealed, nitrogen filled, vibration resistant relays with gold-plated interconnects
G10-FR constructed circuit boards, with solder masks reflowed tin-plating, and environmental post-coating
