Extron Electronics MVC 121 Plus User Guide User Manual
Page 13
Sound System
CSR 6 RCA Adapter
VARIABLE
LR
Unbalanced Stereo Output
Tip
NO GROUND HERE.
Sleeve(s)
Tip
NO GROUND HERE.
Balanced Stereo Output
Tip
Ring
Sleeve(s)
Tip
Ring
LR
LR
Left
Right
Left
Right
Do not tin the wires!
CAUTION: Connect the sleeve to ground. Connecting the sleeve to a negative
( –) terminal will damage the audio output circuits.
f
Fixed output left (L) and right (R) — The balanced/unbalanced stereo output from
the 5-pole 3.5 mm captive screw connector is output at a fixed volume adjustable gain
level for input to a recording device. Level can be adjusted at the recording device, or
using output gain control with a range of -24 to +12 dB.
NOTE: The main volume control knob on the front panel operates independently
of the fixed output. Both the fixed and variable output connectors will
output audio simultaneously.
The fixed output connector is wired the same as the variable output connector. See
e
, variable output connector, for an example application diagram with cabling
instructions and a caution.
g
RS-232 — Connect an RS-232 device (control system or PC) to the 6-pole 3.5 mm
captive screw connector for two-way RS-232 communication. Software for
RS-232 control is included with the MVC. See
information on how to install and use the control software and SIS commands.
Transmit (Tx)
Receive (Rx)
Ground (Gnd, )
RS-232
2
1
Tx
Rx
DIGI IN
3
h
Digital input (DIGI IN) — A 6-pole 3.5 mm captive screw connector provides three
configurable ports designed to connect to various devices such as motion detectors,
alarms, buttons, photo (light) sensors, temperature sensors, or other devices. This
connector shares a common ground with the RS-232 connector (g). The wiring
diagram is shown below.
Do not tin the wires!
1
2
3
_
Digital I/O Wiring
MVC 121 Plus • Installation
7