User Guide Audio Converter BUC 202 Two Channel Balanced and Unbalanced Audio Converter 68-2351-01 Rev.
Safety Instructions Safety Instructions • English WARNING: This symbol, , when used on the product, is intended to alert the user of the presence of uninsulated dangerous voltage within the product’s enclosure that may present a risk of electric shock. ATTENTION: This symbol, , when used on the product, is intended to alert the user of important operating and maintenance (servicing) instructions in the literature provided with the equipment.
FCC Class B Notice This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to part 15 of the FCC rules. These limits provide reasonable protection against harmful interference in a residential installation. This equipment generates, uses, and can radiate radio frequency energy and, if not installed and used in accordance with the instructions, may cause harmful interference to radio communications. There is no guarantee that interference will not occur.
Contents Introduction..................................................... 1 Features.............................................................. 1 Application Example............................................ 2 Setup and Operation....................................... 3 Rear Panel Features and Cabling......................... 3 Front Panel Feature............................................. 5 Adjusting the Trim................................................ 5 Mounting.............................
Introduction The Extron BUC 202 is a two channel balanced and unbalanced audio converter and audio line driver. It features two balanced or unbalanced inputs and outputs, both on captive screw connectors. The BUC 202 provides two independent channels of signal matching between unbalanced and balanced audio equipment. Two rotary switches provide precise trim adjustment from -21 to +21 dB in clearly-labeled 3 dB steps.
Application Example The illustration below is one example of configuring a system using the BUC 202. Extron BUC 202 C BU 20 2 S UT TP 2 OU TS PU 2 Two Channel Audio BUC 1 IN 1 z -60H 50 AX 0V M 0.2A 0-24 10 IM 2 TR 0 3 69 -3 12 -6 15 0 3 6 9 -9 18 -3 -12 12 -15 8 1 21 -6 15 -1 -2 -9 18 -12 -15 8 1 21 -1 -2 1 Extron STP20-2 Cable Serial Control/Audio Cable PC 1 2 3 G I/O MIC 8V +4 2 WER PO X V 12 MA A 1.
Setup and Operation The Setup and Operation section describes: • Rear Panel Features and Cabling • Front Panel Feature • Adjusting the Trim Rear Panel Features and Cabling 100-240V 50/60 Hz 0.2A MAX BUC 202 TRIM INPUTS 2 1 1 2 OUTPUTS 1 2 -3 0 3 -3 0 3 6 -6 6 -6 9 9 -9 -9 12 -12 12-12 -15 15 15 -15 -18 18 18 -18 -21 21 -21 21 A B C A B AC power A B AC power — Connect to standard AC power: 100 to 240 VAC, at 50 or 60 Hz. Trim adjustment Figure 2.
C Input connector — This 3.5 mm, 5-pole captive screw connector accepts line level balanced or unbalanced, mono or stereo audio signals (see to the illustrations below for proper wiring). ATTENTION: The length of the exposed wires in the stripping process is critical. The ideal length is 3/16 inches (5 mm). Any longer and the exposed wires may touch, causing a short circuit between them. Any shorter and the wires can be easily pulled out even if tightly fastened by the captive screws.
Front Panel Feature BUC 202 A Figure 6. A BUC 202 Front Panel Power LED — The green lights when the BUC 202 is receiving power. Adjusting the Trim The BUC 202 can be wired in four different configurations: • Balanced input to unbalanced output • Unbalanced input to balanced output • Balanced input to balanced output • Unbalanced input to unbalanced output Follow the steps below to adjust the trim: 1. Disconnect power from all devices. 2.
Mounting The Mounting section describes: • UL Rack Mounting Guidelines • Tabletop Mounting • Rack Rail and Under-Furniture Mounting • Rack Shelf Mounting UL Rack Mounting Guidelines The following Underwriters Laboratories (UL) guidelines pertain to the safe installation of the BUC 202 in a rack. 1. Elevated operating ambient temperature — If installed in a closed or multi-unit rack assembly, the operating ambient temperature of the rack environment may be greater than room ambient temperature.
U B C 20 2 Rack Rail Mounting ZipClip 200 B U Side of Rack C B 2 U C 20 2 20 2 S UT TP 1 Back of Rack T R -6 1 -1 -9 -3 0 -1 2 3 -1 5 6 8 -2 9 1 12 2 21 18 15 -1 -9 -6 -3 0 -1 2 3 -1 5 6 8 -2 9 1 12 21 18 15 IM TR IM 2 1 OU TS PU IN Hz 50/60X MA 40V0.2A 100-2 Inside of Rack Figure 7. BUC 202 Rack Rail Mounting 1. Fasten the ZipClip 200 mounting clip to a convenient location on a rack rail using two rack screws. 2.
5. To remove the BUC 202 from the ZipClip 200 mounting clip, press down on the locking tab (1) while lifting up on the unit (2). 2 BU C 20 2 1 Under-Furniture Mounting 1 ZipClip 200 2 60 50/ X 0V -24 MA 100 0.2A Hz 0 3 69 -3 12 -6 1 15 0 3 6 9 -9 18 -12 -3 21 12 -15 -6 15 -18-21 -9 18 -12 21 -15 -18-21 IM TR 2 1 S UT 2 OU 1 TP BU C S UT 2 20 2 Figure 8. INP Furniture Mounted BUC 202 BUC 202 Under-Furniture Mounting NOTE: The ZipClip is shipped with a set of four wood screws. 1.
4. To secure any loose cables and to provide strain relief, attach tie wraps (“zip ties”) around the tie wrap notches on the BUC 202 and through the anchor points on the mounting clip. 10 0-2 40 V 0.2 50 A MA /60 X Hz 1 TR IM -6-3 0 -9 3 -12 6 -15 2 9 -18 -6-3 0 12 -9 3 -21 15 -12 6 2118 -15 9 -18 12 -21 15 2118 IN PU TS 1 2 BU C 20 2 OU TP UT 1 S 2 Tie Wrap ATTENTION: Connect and pull the tie wraps until they are secure. Do not overtighten. 5.
Rack Shelf Mounting 2 BU C 20 2 RSB 123 Rack Shelf 1 (2) 4-40 x 3/16" Screws Rack Mounted Figure 9. BUC 202 Rack Shelf Mounting 1. Align the threaded holes in the bottom of the BUC 202 with the holes in an Extron rack shelf (1). Fasten the unit to the shelf with two 4-40 x 3/16-inch screws. 2. Bolt the rack shelf to the rack (2).
Extron Warranty Extron Electronics warrants this product against defects in materials and workmanship for a period of three years from the date of purchase.
