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Extron electronic SF 228T manual

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Table of contents for the manual

  • Page 1

    User Guide SF 228T Audio Products 2 ’ x 2 ’ Ceiling Speakers 68-2018-01 Rev. A 0 5 11[...]

  • Page 2

    This symbol is intended to alert the user of important operating and mainte- nance (servicing) instructions in the literature provided with the equipment. This symbol is intended to alert the user of the presence of uninsulated dangerous voltage within the product feets enclosur e that may present a risk of electric shock. Caution Read Instructions[...]

  • Page 3

    FCC Class A Notice This equipment has been tested and found to comply with the limits for a Class A digital device, pursuant to part 15 of the FCC Rules. Operation is subject to the following two conditions: 1. This device may not cause harmful interference. 2. This device must accept any interference r eceived, including interference that may caus[...]

  • Page 4

    Copyright, and T rademark Information Conventions Used in this Guide In this user guide, the following are used: NOTE: A note draws attention to important information. TIP: A tip provides a suggestion to make working with the application easier . CAUTION: A caution indicates a potential hazard to equipment or data. WARNING: A warning war ns of thin[...]

  • Page 5

    SF228TSpeakerSystem•Contents v Contents Precautions/Safety Instructions ............................. ii FCC Information ................................................. iii Copyright, and T rademark Information ............... iv Introduction ............................................................ 1 About this User Guide ...[...]

  • Page 6

    SF228TSpeakerSystem•Contents vi[...]

  • Page 7

    SF228TSpeakerSystem•Introduction 1 Intr oduction About this User Guide This user guide contains information about the Extron SF 228T 2-way ceiling speakers. The SF 228T features a low pr ofile design that houses an 8-inch woofer and 1-inch dome tweeter and has the appearance of a standard ventilation grill. All drivers and componen[...]

  • Page 8

    SF228TSpeakerSystem•Introduction 2 Application Example The following illustration is an application example. POWER 12V 1.5A MAX RESET LAN 3 6 2 5 1 4 4 5 6 1 2 3 4 MIC/LINE INPUTS O U T P U T S TxRx RS-232(2) Tx Rx RS-232(1) I/O 4 5 6 12 3 MIC + 48V 1 3 2 DMP 64 LAN ACT LINK RESET INPUTS OUTPUTS 1 2 3 4 US LISTED 1T23 I.T.E. ® 1 2[...]

  • Page 9

    SF228TSpeakerSystem•Installation 3 Installation This section discusses how to install the SF 228T speaker and includes: • Installation Considerations • Installing the Speakers • Speaker Cabling • Completing the Installation CAUTION: Installation and service must be performed by authorized personnel only . Installation Consi[...]

  • Page 10

    SF228TSpeakerSystem•Installation 4 3. Remove the terminal cover plate — Loosen (do not remove) the two scr ews in the keyhole slots on the top terminal cover plate and remove the cover plate as shown below . Loosen, bu t do not remo ve the terminal co ve r plate screws in the two key hole slots. Te rminal Cover Plate Figure 2. Re[...]

  • Page 11

    SF228TSpeakerSystem•Installation 5 b. When using speaker wires without conduit — Secur e the cable clamp adapter (included) to the cover plate and insert the wires thr ough the clamp, (see the illustration below). Te rminal Cover Plate Seismic Cable Pa ss Through Loop Cable Clamp Adapter (Included) Rear of Speaker Spea ke r Te rm[...]

  • Page 12

    SF228TSpeakerSystem•Installation 6 1. Flip the terminal cover plate so the transformer side is up. Black (-) To Second Spea ke r Red (+) Red (+) Black (-) Fr om Amplifier (70V/100V) NC 2 W 4 W 8 W 16 W 32 W COM 70 V 100 V COM NC 32 W 16 W 8 W 4 W 2 W (Red) To Speaker , Te r minal (Black) To Speaker . Te rminal Ca bl e Access Openin[...]

  • Page 13

    SF228TSpeakerSystem•Installation 7 e. T o wir e additional speakers, route the speaker wir es from the second speaker through the cover plate hole to the transformer side. T wist the black negative ( – ) wires together and the r ed positive ( + ) wires together befor e inserting them into the terminal block. Additional speakers c[...]

  • Page 14

    SF228TSpeakerSystem•Installation 8 Direct 8 Ohm Connection to an Amplifier 1. An amplifer 8 ohm speaker output can be directly connected to the speaker terminal of the SF 228T , (see the diagram below). From Amplifier Red Wire Black Wire Rear of Speaker Speaker Te r minal Direct 8 ohm Connection (Bypassing the Tr ansformer) Fr om A[...]

  • Page 15

    SF228TSpeakerSystem•Installation 9 Completing the Installation NOTE: Observe all applicable building codes and local ordinances when installing the speaker . 1. For installation in a 2 feet x 2 feet ceiling tile, remove a tile and place the speaker on the existing support rails as shown below . Extron SF 228T Tw o-w ay Ceiling Spea[...]

  • Page 16

    SF228TSpeakerSystem•Installation 10 2. If seismic safety lines are being used, install them now . In addition to the tie off at 4c , Extron r ecommends tie offs on at least two at the four available tabs at 4e . See the illustration below . Attach the seismic safety cable to either tab . Anchor the safety cab les to a suitable secu[...]

  • Page 17

    SF228TSpeakerSystem•Reference 11 Specifications, Dimensions and Packaging This section discusses the specifications, part number , and packaging for the SF 228T speakers. T opics that ar e covered, include: • Specifications • Part Numbers • Dimensions • Packaging Specifications Audio/acoustic and electrical Speaker type ...[...]

  • Page 18

    SF228TSpeakerSystem•Reference 12 Vibration ........................................ IST A 1A in carton (International Safe T ransit Association) Regulatory compliance Safety ...................................... NFP A90A, NFP A70; UL Listed for use in plenum airspaces: meets UL 2043 for heat and smoke release, meets UL 1480 for co[...]

  • Page 19

    SF228TSpeakerSystem•Reference 13 Dimensions SF 228T 5.30" 23.75" 23.75"[...]

  • Page 20

    SF228TSpeakerSystem•Reference 14 Packaging Ceiling Tile Rails Speakers Protective Sheet T op Cap Bottom Cap End Cap Rail T ube SF 228T Setup Guide[...]

  • Page 21

    Extr on ® W arranty Extron Electr onics warrants this product against defects in materials and workmanship for a period of thr ee years from the date of pur chase. In the event of malfunction during the warranty period attributable directly to faulty workmanship and/or materials, Extron Electr onics will, at its option, repair or r eplace said pro[...]