Extron Electronics MVC 121 Plus User Guide - Manual (Page 11)

CAUTION: Always use a power supply supplied or specified by Extron. Use
of an unauthorized power supply voids all regulatory compliance
certification and may cause damage to the supply and the end
product.
Unless otherwise stated, the AC/DC adapters are not suitable for
use in air handling spaces or in wall cavities. The power supply is
to be located within the same vicinity as the Extron AV processing
equipment in an ordinary location, Pollution Degree 2, secured to the
equipment rack within the dedicated closet, podium or desk. Power
over Ethernet (PoE) is intended for indoors use only. No part of the
network that uses PoE can be routed outdoors.
The installation must always be in accordance with the applicable
provisions of National Electrical Code ANSI/NFPA 70, article 75 and the
Canadian Electrical Code part 1, section 16. The power supply shall
not be permanently fixed to building structure or similar structure.
NOTE: The length of the exposed wires in the stripping process is critical. The
ideal length is 3/16 inches (5 mm). Any longer and the exposed wires may
touch, causing a short circuit between them. Any shorter and the wires
can be easily pulled out even if tightly fastened by the captive screws.
Do not tin the wires. Tinned wire does not hold its shape and can become
loose over time.
b
Mic 1 and 2 +48 V phantom power LED indicators — The LED lights whenever the
corresponding mic phantom power is on and goes off when the phantom power is
off.
c
Mic/line inputs 1 and 2 — Up to two mono microphones or line level signals,
balanced and/or unbalanced, may be connected to the 6-pole 3.5 mm captive screw
connector. Inputs provide gain settings to accommodate consumer and pro operating
line level sources, with sufficient gain to support mic level audio.
1 2 MIC/LINE
Balanced MIC Unbalanced MIC
Jumper
NOTE: Mic inputs will be evenly mixed into both left and right outputs.
MVC 121 Plus • Installation 5