5
Power Connection
Use the 2-pole, 3.5 mm captive screw power connector to connect a power supply (not
provided). The MLA VC10 Plus can share a power supply with an Extron control processor. If
you are using a third-party controller, the MLA VC10 Plus must be connected to the Extron
external 12 VDC, 1 A power supply (part number
70-775-01
), which must be purchased
separately.
CAUTIONS:
•
For proper start up, the MLA VC10 Plus must be completely powered
off before connecting it to the 12 VDC power supply.
•
Read the caution in the “Power Connections” section of the
MLA VC10 Plus User Guide
for important information about power
supplies and sharing a power supply between the MLA VC10 Plus and
the MLC 104 IP Plus.
Additional Setup and Configuration
Connecting the Relay (Optional)
By default, the relay is used for the auto mute
function. The relay automatically triggers on
whenever the volume level on the MLA is 0 (see the
MLA VC10 Plus User Guide
for more information
about this function). For a third-party amplifier that
has contact closure terminals, the relay can be used
to mute the audio.
This example shows how to set up the relay with
a TOA 900 Series amplifier. Connections to other
amplifiers are similar but see the user guide for your
amplifier for details.
1.
Connect the ground (Gnd) of the TOA 900 Series
amplifier to the common (C) pin of the MLA VC10 Plus.
2.
Connect the Mute 1 and Mute 2 terminals of the TOA 900 to the Normally Open (NO)
pin of the MLA VC10 Plus.
The relay can be used for other, general purpose control once the auto mute function has
been disabled. One example is to place the amplifier in standby mode to conserve power
when it is idle. See the
MLA VC10 Plus User Guide
for examples and instructions.
C Common
REMT
VO
L
MUTE
1
MUTE
2
GN
D
RELAY
NO
NC
C
Extron MLA VC10 Plus
TOA 900 Series
Amplifier
