MLA VC10 Plus

Volume Control Module
Key Features
  • Converts RS-232 commands to contact closure, voltage, and impedance changes for remote amplifier volume control
  • Volume and mute control for the MPA Series and select XTRA™ Series amplifiers, and a wide range of commercial amplifiers
  • For MediaLink® Controllers with RS-232, TouchLink®-based systems, and other control systems
  • Ground isolated, digital circuitry prevents noise in signal path
  • Soft Start volume ramping gently restores volume levels during power cycles and unmuting
  • Selectable volume taper provides a consistent linear or natural logarithmic feel to volume changes
The Extron MLA VC10 Plus
Model Version Description Part #
MLA VC10 Plus Volume Control Module 60-1090-01

The Extron MLA VC10 Plus Volume Control Module converts RS-232 commands from a control system into voltage or impedance changes to control audio amplifiers with volume and mute control ports. The MLA VC10 Plus is used to mute or make level changes on an MPA Series or half rack XTRA™ Series amplifier from a TouchLink® Touchpanel system, an RS-232-capable MediaLink® Controller, or other control system. The control module also supports third-party amplifiers that use either voltage or 10k ohm pot control. The MLA VC10 Plus is housed in a 1U, one-eighth rack width metal enclosure for numerous installation options. The MLA VC 10 Plus can be powered by an optional power supply, or from the power supply used for a MediaLink Controller or IPL Series Ethernet Control Interface.

Commercial power amplifiers with volume and mute control capability often are not equipped for RS-232 or Ethernet control. The MLA VC10 Plus bridges the gap between these amplifiers and MediaLink and TouchLink control systems by providing a convenient means to adjust volume and muting. It offers variable voltage and resistance outputs to control volume, plus a dual mode relay port that provides contact closure for muting the amplifier.

The MLA VC10 Plus features Soft Start volume ramping which slowly increases the amplifier’s volume to the previous level when powering up or when the module is unmuted. Soft Start prevents sudden, loud bursts of sound that can damage equipment or harm the listener’s hearing. A mini USB port on the front panel provides convenient access for device configuration. LEDs on the front panel indicate power and mute status, plus relay activity to facilitate setup and troubleshooting. The MLA VC10 Plus also includes an Inverse Mode for amplifiers that require a decrease in control voltage or resistance in order to increase volume. For integration convenience, the control module can be configured using the included Data Viewer software.


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  MBB 100 Back of Rack Mounting Kit


MLA VC10 Plus
Control/remote — MLA volume controller
   Serial control port 1 RS-232, 3.5 mm captive screw connector, 3 pole
   Baud rate and protocol 9600 baud, 8 data bits, 1 stop bit, no parity
   Serial control pin configuration 1 = Tx, 2 = Rx, 3 = GND
   USB control ports 1 front panel female mini USB B
   USB standards USB 2.0, low speed
    NOTE     The USB connector provides 5 VDC for configuration purposes only.  This port cannot be used to supply power during operation.
   Program control Extron Simple Instruction Set (SIS)
Control — voltage — amplifier
   Number/type 1 control voltage
   Connectors (1) 3.5 mm captive screw connector, 2 pole
   Pin configuration 1 = +, 2 = GND
   Control voltage output range 0 - 10 VDC (typical tolerance ±0.2 volts), adjustable
Control — resistance — amplifier
   Number/type 1 control resistance
   Connector (1) 3.5 mm captive screw connector, 3 pole
   Pin configuration 1 = +, 2 = wiper, 3 = GND
   Range 0 - 10 kilohms (typical tolerance ±0.2 kilohms), adjustable
   Max. input voltage 25 VDC
   Max. current/power rating 5 mA/25 mW across the + and wiper or GND and wiper pins
Control — relay — amplifier
   Number/type 1 momentary or latching
   Connector (1) 3.5 mm captive screw connector, 3 pole
   Connector configuration 1 = 1 normally open relay, 2 = common, 3 = 1 normally closed relay
   Contact rating 24 V, 1 A
   Power Supplied by a 12 VDC, 1 A external power supply (sold separately) or a MediaLink® or IP Link® controller
   Power input requirements 12 VDC, 0.3 A (max.)
   Temperature/humidity Storage: -40 to +158 °F (-40 to +70 °C) / 10% to 90%, noncondensing
Operating: +32 to +122 °F (0 to +50 °C) / 10% to 90%, noncondensing
   Cooling Convection, no vents
      Rack mount Yes, with optional 1U rack shelf or back of the rack mounting kit
      Furniture mount Yes, with optional mini under-desk mounting kit, or set on tabletop
   Enclosure type Metal
   Enclosure dimensions 1.7" H x 2.2" W x 3.0" D (1U high, one-eighth rack wide)
(4.3 cm H x 5.6 cm W x 7.6 cm D)
(Depth excludes connectors.)
   Product weight 0.2 lbs (0.1 kg)
   Shipping weight 1 lb (0.5 kg)
   Vibration ISTA 1A in carton (International Safe Transit Association)
   Regulatory compliance 
      Safety CE, c-UL, UL
      EMI/EMC CE, C-tick, FCC Class A, ICES, VCCI
      Environmental Complies with the appropriate requirements of RoHS, WEEE.
   Product warranty 3 years parts and labor
    NOTE     All nominal levels are at ±10%.
    NOTE     Specifications are subject to change without notice.
Shipping Dimensions and Weights
    Part # Height Width Depth Weight
    60-1090-01 2.69" (6.8 cm) 9.5" (24.1 cm) 7.3" (18.5 cm) 1.03 lbs (0.47 kg)


Application Diagram

Panel Drawing

Panel Drawing
© 2020 Extron. Specifications are subject to change without notice.