Remote Control
e
Remote input connector — This 3‑pin, captive screw port allows
an audio controller to control volume and mute levels remotely. See
Remote Control Options on page 11 if using a MediaLink controller.
Wiring for remote control
Options for remote control include the Extron VC50, VCM100AAP, VCM100MAAP,
VCM200 series, and MLAVC10 Plus. Third party 10k potentiometer volume controllers can
also be connected to this port.
Figure 5 and the instructions below show the wiring for the VCM 100 MAAP. Wiring other
remote control connectors is similar.
VCG
10V 50mA
REMOTE
olume Pot
s
2k ohms
Vol/Mute
(Pin 2)
10 V (Pin 1)
Mute
Switch
Figure 5. Remote Control Wiring
• Pin 1 is for 10 VDC reference voltage output.
• Pin 2 (C) has two functions:
• Volume control: it can be used as a variable voltage input between 0 and 10 VDC,
with 0 V giving full attenuation and 10 V giving maximum volume.
• Mute: it can be used for remote control muting. Sound is muted while this pin is
shorted to ground.
• Pin 3 is for the ground connection.
NOTE: All nominal levels are at ±10%.
Controlling multiple amplifiers with one volume controller
Several MPA 152 Plus units can be daisy‑chained so that one volume controller can
simultaneously regulate the volume of all the amplifiers.
NOTES:
• As additional amplifiers are added to the daisy chain, the sensitivity of the
volume potentiometer changes. The maximum volume level (fully clockwise)
is not affected. However the effectiveness of the minimum volume level (fully
counterclockwise) in reducing the volume to inaudible levels decreases as
more amplifiers are added to the daisy chain.
• When more than two amplifiers are attached to the chain, sound may begin
to be heard even if the levels have been set to their lowest. The muting of
the output however can be remedied with a contact closure button attached
between the C (volume or mute) and G (ground) pins of the first amplifier in the
chain.
VCG
10V50mA
MPA 152 Plus • Panels and Cabling 7
