Crestron
QM-MD4x2
QuickMedia Distribution System
QM POWER
G
24
The MD4x2 contains two 2-position terminal block connectors that provide 24VDC
power to the Cresnet ports on each of the QM ports. Power to the QM power ports
can be supplied by the Crestron C2N-SPWS300 External 300 Watt Power Supply or
the Crestron CN-PWS75 External 75 Watt Power Supply. For more information,
refer to “Hardware Hookup” on page 16.
NET
24
G
Z
Y
This 4-position terminal block connector is used to connect the MD4x2 to the
Cresnet system. Data and power for the MD4x2 are provided via the connection.
Refer to “Network Wiring” on page 9.
Indicators & Pushbuttons
The MD4x2s indicators and pushbuttons are described in the following paragraphs.
PWR (Power)
This LED, located on the front panel, illuminates when 24 VDC is supplied to the
MD4x2 via the NET port.
NET
This LED, located on the front panel, illuminates when communication between the
control system and the MD4x2 is established (the unit is polled on the network).
Illumination indicates that the SIMPL Windows program currently loaded has a
network device defined at the same Net ID as the MD4x2. The LED flashes when
communication with the processor occurs.
AUDIO BREAK
When operating in the local mode, press this button to enable separate switching of a
QM signal’s audio and video portions. Push again to disable this feature and enable
simultaneous switching. When the accompanying LED is illuminated, a QM signal’s
audio and video portions can be switched separately. When the LED is not
illuminated, the QM signals audio and video portions are switched simultaneously.
For more information on the MD4x2’s operating modes, refer to “Operating Modes”
on page 28.
A
Press this button to switch the audio portion of QM signals when operating in the
local mode. When the accompanying LED is illuminated, only the audio portion of a
QM signal will be switched. Audio can be switched separately from video only when
the
AUDIO BREAK
LED is illuminated.
While in the system mode, pressing
A
will indicate where the audio portion of a
signal is routed. For more information on the MD4x2’s operating modes, refer to
“Operating Modes” on page 28.
V
Press this button to switch the video portion of a QM signal when in the local mode.
When the accompanying LED is illuminated, only the video portion of a QM signal
will be switched. Video can be switched separately from audio only when the
AUDIO BREAK
LED is illuminated.
Operations Guide - DOC. 6278
QuickMedia Distribution System: QM-MD4x2
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