Extron-electronics MPA 152 User Guide Manual de usuario descargar pdf (Pagina 13)

Remote Control

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

Optional Accessories 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

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 ampliers 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

OL/MUTE

10V50mA

MPA 152 • Panels and Cabling 7

1 2 ... 8 9 10 11 12 13 14 15 16 17 18 ... 21 22

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Extron-electronics MPA 152 User Guide Manual de usuario Pagina 13

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