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Rev. B
Product No. 3940.1
Automatic Crew-Overboard Light
ACR Electronics, Inc.
5757 Ravenswood Road
Fort Lauderdale, Fl 33312
+1(954) 981-3333 • Fax +1 (954) 983-5087
A Cobham plc Company

Summary of Contents

  • Page 1

    PRODUCT SUPPORT MANUAL Y1-03-0165 Rev. B SM-2 Product No. 3940.1 Automatic Crew-Overboard Light ACR Electronics, Inc. 5757 Ravenswood Road Fort Lauderdale, Fl 33312 +1(954) 981-3333 • Fax +1 (954) 983-5087 Email: A Cobham plc Company...

  • Page 2

    Forward Congratulations and thank you for purchasing the ACR SM-2 Automatic Crew-Overboard Light. The combination of superior design, high quality raw materials and quality controlled manufacturing produces a product that will perform for years to come. The Test Facility at ACR can reproduce some of the harshest environmental conditions known to man.

  • Page 3: Table Of Contents

    TABLE OF CONTENTS PARA. TITLE PAGE SECTION 1 - CHARACTERISTICS General Purpose Component Ratings Operation Effect of Testing Encapsulating Materials Construction Lanyard Case 1.10 Lens 1.11 Ballast 1.12 Mounting Bracket 1.13 Dimensional Stability and Vapor proofness 1.14 Battery Connection 1.15 Buoyancy 1.16 Stroboscopic Flashing Light...

  • Page 4: Section 1 - Characteristics, General, Purpose, Component Ratings, Operation, Effect Of Testing, Encapsulating Materials

    SECTION 1 - CHARACTERISTICS GENERAL This section describes operating instructions and operational characteristics of the SM-2 Automatic Crew-overboard light. The information presented herewith is in conformance with U.S. Coast Guard Specification 46 CFR 161.010 and 161.110. The SM-2 is a lightweight, compact, battery operated, portable unit which uses modular construction for basic circuits to simplify maintenance and replacement procedures.

  • Page 5: Construction, Lanyard, Case, Lens, Ballast, Mounting Bracket, Dimensional Stability And Vapor Proofness

    CONSTRUCTION The SM-2 Light essentially consists of a case with a battery, switch, electric circuit, flashlamp, globe, lanyard attachment flange, a mounting bracket, and a buoyant, non-absorbent unicellular polyfoam, used as filler material. LANYARD The size, weight, and shape of the light are suitable for conveniently throwing overboard, while attached to a life ring buoy by means of a lanyard.

  • Page 6: Battery Connection, Buoyancy, Stroboscopic Flashing Light

    1.14 STROBOSCOPIC FLASHING LIGHT The SM-2 Flashing Light uses a capacitor discharge xenon flashtube and meets the following requirements. A. A completely sealed solid state circuit converts power from the battery and supplies it to the flashtube. B. A suitable capacitor discharge, xenon flashtube is provided which is compatible with the electronic flashing circuit and lens which will provide the required light output.

  • Page 7: Technical Data Sm-2

    1.17 TECHNICAL DATA - SM-2 Pertinent Technical Data is listed below: ITEM CHARACTERISTICS Dimensions 13.65" (34.67 cm) length 4" (10.16 cm) diameter Weight 3 lbs, 4 oz. (1.474 Kg), including battery 1 lb, 13 oz. (.822 Kg), excluding battery Modules (1) completely sealed electronics Flashing Rate 60 times per minute ±...

  • Page 8: Figure 1 Outline And Dimensional Sketch


  • Page 9: Figure 2 Instruction Plate Label


  • Page 10: Section 2 - Installation, Installation Procedures, Battery Installation, Operation, Inspection, Disassembly 9

    SECTION 2 - INSTALLATION INSTALLATION PROCEDURES The installation procedure requires that the mounting bracket be securely fastened in any convenient location which would provide immediate access in the event of emergency situations. Suitable length ¼ - 20 stainless screws should be used for mounting the bracket. Screw heads should not protrude inside the bracket surface.

  • Page 11

    3. Inspect O-Ring seal for proper fit. Lubricate with silicone grease. F. Replace the battery by securing the two terminals to the battery posts. Assure tightness. NOTE: Connect black lead to center (-) post of battery. Connect red lead to outer (+) post of battery. G.

  • Page 12: Sm-2 Parts List

    SM-2 PARTS LIST ITEM DESCRIPTION PART NUMBER Case Assembly A3-06-2295 Case A1-18-1878 Washer, 3 each A1-05-0659-3 Locking Swivel, 3 each A1-17-1283 Battery Pad, Foam A1-18-0773 Battery Not Included 6 Volt Lantern Type (See Tech. Data 2.17 for recommended battery) Foam Filler A1-18-1877 O-Ring (Top Cap) A1-05-0001-64...

  • Page 13

    FIGURE 3 EXPLODED VIEW SM-2 Y1-03-0165 Rev. B...

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