User’s Manual MLA-VC10 MediaLink Accessory www.extron.com Extron Electronics, USA Extron Electronics, Europe Extron Electronics, Asia Extron Electronics, Japan 1230 South Lewis Street Anaheim, CA 92805 USA 714.491.1500 Fax 714.491.1517 Beeldschermweg 6C 3821 AH Amersfoort The Netherlands +31.33.453.4040 Fax +31.33.453.4050 135 Joo Seng Road, #04-01 PM Industrial Building Singapore 368363 +65.6383.4400 Fax +65.6383.4664 Daisan DMJ Building 6F 3-9-1 Kudan Minami Chiyoda-ku, Tokyo 102-0074 Japan +81.
Precautions Safety Instructions • English This symbol is intended to alert the user of important operating and maintenance (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's enclosure that may present a risk of electric shock. Caution Read Instructions • Read and understand all safety and operating instructions before using the equipment.
Quick Start Guide — MLA-VC10 Setting Up the MLA-VC10 To install and set up the MLA-VC10, follow these steps and see the appropriate section of this manual for details: Step 1 Determine the control voltage required by the amplifier or mixer. See “Determining the Control Voltage” on pages 2-3 to 2-6 of this manual. Step 2 Set the MLA-VC10’s DIP switches to match the voltage determined in 1. See “Setting the Configuration DIP Switches” on page 2-7, and the reference tables on pages 2-8 and 2-9.
Quick Start Guide — MLA-VC10, cont’d MLC/RS-232 POWER POWER/ STATUS MLA-VC10 Chapter 1 • Introduction .......................................................... 1-1 NOTE The external power supply provides power to both the MLA-VC10 and the MLC. An external power supply (12VDC, 1A max.
Table of Contents, cont’d MLA-VC10 1 Chapter One Introduction About the MLA-VC10 ii MLA-VC10 • Table of Contents
Introduction About the MLA-VC10 (part #60-502-01) Along with an RS-232 host device, the Extron MediaLink™ Accessory Volume Control 10 (MLA-VC10) can be used to remotely control the volume output of an audio mixer or amplifier that has a 0VDC to 10VDC variable voltage remote control port for volume control.
Installation Front and Rear Panel Features Front MLA-VC10 MLC/RS-232 POWER POWER/ STATUS The MLA-VC10 drives the amplifier’s or mixer’s remote control port. Each model or line of amplifier or mixer may require a different voltage for controlling the audio volume. You need to know the specific voltage your equipment requires before you can set up the MLA-VC10 to control it.
Installation and Setup, cont’d Measuring voltage for a TOA A-903MK2 amplifier Control terminals for several TOA amplifiers are two screw terminals labeled “REMT VOL”. They do not indicate which terminal is for control voltage and which is for the ground. Use a voltmeter (set to VDC) to measure the voltage as shown here. In the picture below the measured voltage is positive, so the upper terminal is the signal voltage terminal, and the lower terminal is for the ground connection.
Installation and Setup, cont’d Measuring voltage for a Biamp Precedence CMA 60 amplifier Several Biamp amplifiers have three screw terminals labeled “remote level”. The control voltage may be indicated (by a “C” in the following picture) on the panel over the corresponding screw terminal, and the ground terminal is indicated with a . Even if the voltage is indicated, use a voltmeter (set to VDC) to measure the voltage as shown in the picture below.
Installation and Setup, cont’d MLA-VC10 DIP Switch Settings for Approximate Amplifier/Mixer Measured Control Voltages (cont'd) MLA-VC10 DIP Switch Settings for Approximate Amplifier/Mixer Measured Control Voltages Voltage Closed = up, Closed = up, Closed = up, Voltage Voltage Open = down, Open = down, Open = down, 1 2 3 4 5 6 7 8 1 2 3 4 5 6 7 8 1 2 3 4 5 6 7 8 10.00 9.96 9.92 9.88 9.84 9.80 9.76 9.73 9.69 9.65 9.61 9.57 9.53 9.49 9.45 8.04 8.00 7.96 7.92 7.88 7.84 7.80 7.76 7.73 7.69 7.65 7.61 7.57 7.
Installation and Setup, cont’d Wiring the MLC/Power connector MLC/RS-232 POWER AB The 12VDC, 1 amp power supply kit (part #70-055-01) is not included with the MLA-VC10.
Installation and Setup, cont’d Error response Operation To control audio volume when using an MLA-VC10, turn a connected MediaLink Controller’s Volume knob, or send commands via an RS-232 remote control device such as a computer or third party control system. If you are using an MLC with the MLA-VC10, use the Controller (MLC) Config portion of the MediaLink control software (included with the MLC) to set the MLC’s volume control to “Switcher” instead of “Projector” .
Installation and Setup, cont’d Troubleshooting Show the firmware version. Show the MLA’s part #. Mute all audio outputs. Unmute all audio outputs. Show the status of audio mute. Additional description Specify the % of maximum audio volume output. Example: set volume to 82% of maximum. Increment audio volume. Decrement audio volume. Show the % of maximum audio level. If the MLA-VC10’s LED doesn’t light: • The MLA-VC10 is not receiving power.
Installation and Setup, cont’d • The amplifier accepts a higher control voltage than the MLA-VC10 provides, so the amplifier will not reach its highest volume level. Try another amplifier with a lower control voltage requirement. If audio output does not reach the amplifier’s maximum volume • If you use an MLA-VC10 with an amplifier/mixer that has a control voltage requirement above 10VDC, the maximum volume may not be reached.
Specifications, Part Numbers, and Accessories Specifications MLA-VC10 Functional Block Diagram Control — amplifier Maximum voltage output .......... 10VDC ± 5% 3.5 mm, 5-pole captive screw connector 10-319-10 MLA-VC10 user’s manual 68-690-01 Cables Plenum Comm-link cable 50 feet, 100 feet, 200 feet 300 feet, 400 feet A-2 Part number Digital Pot. DC Voltage Controller Relay Power Up Amp Protection Low Z +V Microcontroller - Amp/Mixer must support remote volume capabilities.
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