Extron Electronics MVC 121 - Manual (Page 39)

MVC 121 • Remote Control
Contact Closure Mute
For contact closure mute, connect a contact closure remote
control device to the rear panel’s female 6-pole captive screw
connector. The pin assignments for the MVC’s contact closure
mute connector are shown in the following table.
Pin Contact closure Description
1 Connect pin 1 to Gnd Mute input Mic 1
2 Connect pin 2 to Gnd Mute input Mic 2
3 Connect pin 3 to Gnd Mute input Main 3
Gnd Signal ground
Contact closure mute has higher priority over both SIS
commands and front panel operations and is not affected
by either SIS commands or front panel operations.
After contact closure mute has been removed, the input
settings will return to the original settings that were in
effect prior to the mute, including input on/off status
and gain setting.
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