Remote Control
ERemote input connector — This
Wiring for remote control
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| T |
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| REM |
V | C | G | E |
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10V |
| 50mA |
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Options for remote control include the Extron VC 50, VCM 100 AAP, VCM 100 MAAP,
VCM 200 series, and MLA VC10 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.
10 V (Pin 1)
V | C | G | REMOTE |
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10V |
| 50mA |
|
Volume Pot 10k ohms
2k ohms | Vol/Mute |
| |
| (Pin 2) |
Mute
Switch
Ground (Pin 3)
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
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.
MPA 152 Plus • Panels and Cabling | 7 |
