Instruction/ maintenance manual of the product SF 228T Extron electronic
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User Guide SF 228T Audio Products 2 ’ x 2 ’ Ceiling Speakers 68-2018-01 Rev. A 0 5 11.
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.
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.
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.
SF228TSpeakerSystem•Contents v Contents Precautions/Safety Instructions ............................. ii FCC Information ................................................. iii Copyright, and T rademark Information ............... iv Introduction .
SF228TSpeakerSystem•Contents vi.
SF228TSpeakerSystem•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.
SF228TSpeakerSystem•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.
SF228TSpeakerSystem•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 .
SF228TSpeakerSystem•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.
SF228TSpeakerSystem•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).
SF228TSpeakerSystem•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 .
SF228TSpeakerSystem•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.
SF228TSpeakerSystem•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).
SF228TSpeakerSystem•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 .
SF228TSpeakerSystem•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 .
SF228TSpeakerSystem•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 .
SF228TSpeakerSystem•Reference 12 Vibration ........................................ IST A 1A in carton (International Safe T ransit Association) Regulatory compliance Safety .
SF228TSpeakerSystem•Reference 13 Dimensions SF 228T 5.30" 23.75" 23.75".
SF228TSpeakerSystem•Reference 14 Packaging Ceiling Tile Rails Speakers Protective Sheet T op Cap Bottom Cap End Cap Rail T ube SF 228T Setup Guide.
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.
An important point after buying a device Extron electronic SF 228T (or even before the purchase) is to read its user manual. We should do this for several simple reasons:
If you have not bought Extron electronic SF 228T yet, this is a good time to familiarize yourself with the basic data on the product. First of all view first pages of the manual, you can find above. You should find there the most important technical data Extron electronic SF 228T - thus you can check whether the hardware meets your expectations. When delving into next pages of the user manual, Extron electronic SF 228T you will learn all the available features of the product, as well as information on its operation. The information that you get Extron electronic SF 228T will certainly help you make a decision on the purchase.
If you already are a holder of Extron electronic SF 228T, but have not read the manual yet, you should do it for the reasons described above. You will learn then if you properly used the available features, and whether you have not made any mistakes, which can shorten the lifetime Extron electronic SF 228T.
However, one of the most important roles played by the user manual is to help in solving problems with Extron electronic SF 228T. Almost always you will find there Troubleshooting, which are the most frequently occurring failures and malfunctions of the device Extron electronic SF 228T along with tips on how to solve them. Even if you fail to solve the problem, the manual will show you a further procedure – contact to the customer service center or the nearest service center
