Whelen Engineering Company A490ATSC Bedienungsanleitung

Page 1

ENGINEERING COMPANY INC.

Route 145, Winthrop Road,

Chester, Connecticut 06412

Phone: (860) 526-9504

Fax: (860) 526-2009

Internet: www.whelen.com

Sales/Service e-mail: aviation@whelen.com

Aviation

Installation Guide:

Model A490ATSC

P/N 01-0770062-03

Strobe Power Supply

(FAA/PMA Approved)

Form No.13610A (030303)

Specifications:

Position Lights -

Current Draw................4.0 Amps @ 14 Volts D.C.

2.0 Amps @ 28 Volts D.C.

Weight...........................1.7 lbs.

Length........................... 5.00”

Width............................. 3.12”

Height ........................... 3.06”

INSTALLATION PROCEDURES...

Mounting Location

1. Consider areas or locations designated by the aircraft

manufacturer. Do not mount the strobe power supply

closer than three (3) feet of the ADF loop.

2. For alternate locations, consider areas such as the

cabin baggage compartment, the floor under the seat,

non-structural bulkheads, firewalls, etc..

3. If necessary, fabricate support brackets or shelves, and

attach them to the aircraft structure to provide a

mounting surface that will withstand the inertia forces

stipulated in chapters 1 & 3 of AC 43.13-2A.

4. An “IA” or other representative of the FAA must approve

documentation of structural integrity of the fabricated

installation.

5. When installing the strobe light power supply in an

inverted position, drill a 3/16” diameter hole in the lowest

corner of the cover to provide for moisture drainage.

Care must be taken not to let the drill protrude into the

power supply, for it will inflict damage to the electronic

components.

6. Specifically call out the location of the strobe light power

supply of FAA form 337.

Operation:

This power supply will operate ONE strobe light

head assembly at 34 joules of power. It is equipped

to flash up to five (5) other like units simultaneously

when an 18 gage wire is connected to outlet 3 on the

input power connector.

Wiring Instructions

WARNING! STROBE LIGHT POWER SUPPLIES ARE

POLARITY SENSITIVE. REVERSING THE

INPUT POLARITY WILL CAUSE SEVERE

DAMAGE TO THE POWER SUPPLY!

Steps below: “Ref. AC 43.13-1B, Chapter 11, Sections 1, 2, 3 & 7”.

1. Choosing wire size of A+ input lead, refer to Paragraph 444

“Electric Wire Chart” Figure 11.7 & 11.7A, with reference to

“Strobe Light Model Current” requirement chart on page 6 &

11, and “Wire and Circuit Protection Chart” Figure 11.1.

2. Shielded wire is not generally necessary, but has proven

effective in reducing the possibility of radio interference.

3. The power supply shall acquire its power from a low

impedance source such as the alternator or generator end of

the electrical buss as close to the battery as possible.

4. For penetrating pressure hull, refer to the aircraft service

manual.

5. Check all avionics systems for interference.

OUTPUT POWER

POS. 1 (+), RED

POS. 2 (-), BLACK

POS. 3 - SYNC

1 - Anode

2 - Cathode

3 - Trigger

1 - (+)

2 - (-)

3 - SYNC

Looking at the power supply connectors with the mounting plate

flat on a bench, the left connector is the strobe outlet. The right

connector is the power input and synchronization.

Left Connector (Power Output)

Pin 1. (Top) - RED wire/anode

Pin 2. (Center) - BLACK wire/cathode

Pin 3. (Bottom)- WHITE wire/trigger

Right Connector (Power Input)

Pin 1. (Top) - RED wire/13 to 30 volt, positive input

Pin 2. (Center) - BLACK wire/ground

Pin 3. (Bottom)- Synchronization pin/If synchronization is

desired, connect an 18 gage wire between

pin 3 on each power supply.

Page 2

INTERCONNECTING CABLE...

1. The Whelen interconnecting cable shall be secured in place

with approved aviation techniques.

2. The cable shall not parallel ADF, Gyro or Flux Gate compass

leads closer than 12 inches.

3. CABLE COLORING CODING (see figure 3):

PIN 1 - RED (Anode)

PIN 2 - BLACK (Cathode)

PIN 3 - WHITE (Trigger)

SHIELD - Ground at power supply end only

Caution: When pins 1 & 2 or pins 2 & 3 are reversed, the

system will appear to operate normally, however

this condition will cause premature flash tube

failure.

IMPORTANT NOTE:

Your new strobe power supply has an additional circuit built-in to prevent

self-ionization (steady glowing) of the strobe tubes. In some cases, when

replacing older power supplies, the bare shield wire in the existing

harness is pinned together at each end with the black wire. The following

modification must be made to ensure proper operation.

1. At the strobe tube end of the cable, cut the shield wire and tape it off

(DO NOT CUT THE BLACK WIRE).

2. At the power supply end of the cable, cut the shield wire and connect

it to a good ground (DO NOT CUT THE BLACK WIRE).

3. This must be done for each strobe light connection (see figure 3).

SHIELD

CLIP

WHITE

BLACK

RED

SHIELD

BLACK

WHITE

RED

OBSERVE COLOR AND PIN NUMBERS. CABLES CONNECTING REMOTE

POWER SUPPLY TYPE STROBE LIGHTS MUST BE CONNECTED CORRECTLY!

INTERMIXING STROBE LIGHT SYSTEM EQUIPMENT

Whelen Engineering and Aero-flash wiring

between light assemblies and remote

power supplies are identical as pictured

below.

Grimes and SDI (Hoskins) wiring between

light assemblies and remote power sup-

plies are identical as pictured below.

Both Grimes and SDI sometimes use MS

(Cannon Type) Connectors:

= RED (Anode), = WHITE (Trigger),

= BLACK (Ground)

PIN 1 = RED (ANODE)

PIN 2 = BLACK (CATHODE)

PIN3=WHITE (TRIGGER)

SHIELD = RFI DRAIN TO GROUND

POWER 1

3 POS. PIN HSG

3 CONDUCTOR SHIELDED CABLE

SHIELD WIRE CUT AND TAPE SHIELD WIRE

AT STROBE TUBE END

GROUND SHIELD WIRE

AT POWER SUPPLY END

3 POS. SOCKET HSG

SUPPLY

STROBE

TUBE

END

END 3 3

Fig. 3

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