Extron electronics MVC 121 Plus User Manual page 14

Sound System
Tip
NO GROUND HERE.
Sleeve(s)
Tip
NO GROUND HERE.
Unbalanced Stereo Output
CAUTION
For unbalanced audio, connect the sleeve(s)
to the center contact ground. DO NOT
the sleeve(s) to the negative (-) contacts.
ATTENTION:
Connect the sleeve to ground. Connecting the sleeve to a negative ( –) terminal
•
will damage the audio output circuits.
• Connectez le manchon à la borne de terre (Gnd). Connecter le manchon à une
borne négative (-) endommagera les circuits de la sortie audio.
Figure 7. Output Devices Cabled with Two RCA Male Outputs
Fixed output left (L) and right (R) — The balanced/unbalanced stereo output from
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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
variable output connector, for an example application diagram with cabling instructions
and a caution.
RS-232 — Connect an RS-232 device (control system or PC) to the 6-pole 3.5 mm
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captive screw connector for two-way RS-232 communication. Software for
RS-232 control is included with the MVC. See
page 28) for information on how to install and use the control software and SIS
commands.
Transmit (Tx)
Receive (Rx)
Ground (Gnd, )
Figure 8. RS-232
Digital input (DIGI IN) — A 6-pole 3.5 mm captive screw connector provides three
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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.
Tip
Left
Ring
Sleeve(s)
Tip
Right
Ring
Balanced Stereo Output
connect
SIS Programming and Control
MVC 121 Plus • Installation
CSR 6 RCA Adapter
Left
Right
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(see
,
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