Remote control – Extron Electronics MPA 152 User Guide User Manual
Page 13
Remote Control
e
Remote input connector — This 3-pin, captive screw connector
allows a wall-mounted audio controller or MediaLink product to
control volume and mute levels remotely.
Wiring for remote control
Options for remote control include the Extron VC 50, VCM 100 AAP, VCM 100 MAAP,
VCM 200 series, and MLA VC10 Plus. For information about part numbers, see the list of
on page 12. 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.
GND (Pin 3)
Volume Pot
10K Ohms
2K
Vol/Mute
(Pin 2)
10 V (Pin 1)
Mute
Switch
REMOTE
Figure 5.
Remote Control Wiring
•
Pin 1 is 10 VDC reference voltage.
•
Pin 2 (Vol/Mute) has two functions:
a.
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.
b.
It can be used for remote control muting. Sound is muted while the mute pin is
shorted to ground.
•
Pin 3 is ground.
NOTE: All nominal levels are at ± 10%.
Controlling multiple amplifiers with one volume controller
Several MPA 152 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 will change. The maximum volume level (fully clockwise)
will not be 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 MPAs 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 Vol/Mute and Ground pin of the first MPA in the chain.
REMOTE
VOL/MUTE
10V
50mA
MPA 152 • Panels and Cabling
7