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Osimplex <br />Visible Notification Appliances with Speaker and Multi -Candela Strobe; Non -Addressable <br />Ceiling mount S/V installation reference and 2905-9946 tile bridge dimensions <br />Figure 3 shows the mounting of a 4905-9903 Adapter plate to the 2975-9145 box. <br />/ 0 0 0 (� 4 in. or 102 mm square, 1 1/2 in. <br />0 o <br />V or 38 mm deep box with 1 1/2 in. <br />extension (by others) <br />Wiring input terminals and <br />speaker tap selection are <br />accessible from rear of <br />\� speaker housing <br />v i Strobe intensity <br />viewing slot <br />i <br />Intensity selection plug. 1 <br />accessible only from rear of lens <br />t housing, factory setting is 15 cd <br />t <br />Figure 3: Ceiling mount SN installation reference and tile bridge dimensions <br />The surface mount adapter skirts are available in red (4905-9946) or white (4905-9947) <br />�� ° <br />Y995-9M <br />1/2 in. or 13 mm <br />Tile Bridge <br />0.024 in. thick sheet <br />metal, folded with <br />1/2 in lip each side <br />3 3/4 in. or 95 mm square <br />cut ut, centered on plate <br />fo <br />1/4 in. diameter or <br />6 mm holes. 4 places <br />\ 11116 in. <br />17mm <br />\i <br />13 318 in. or 340 mm <br />23 11116 in <br />or 602 mm <br />Page 5 S4906-0003 Rev. 11 4/2021 <br />