Manual

Issue 1, September 2015 Model 43D User Guide
Page 10 Studio Technologies, Inc.
Mounting a Model 43D to a dual-unit rack-
mount panel follows the same procedure
but will apply to two units. Store both of
the removed standard front panels and the
eight “bump on” protectors for possible
later use. Note that on the rack-panel’s
graphics the unit on the left is designated
as A while the unit on the right is desig-
nated as B. This is provided so that each
can be easily identified during installation,
troubleshooting, and operation.
Once the desired one or two Model 43D
units have been installed in a rack-mount
front panel, the assembly can be mounted
into the designated equipment rack.
One space (“1U” or 1.75 vertical inches)
in a standard 19-inch equipment rack
is required. Secure the front panel into
the equipment rack using two mounting
screws per side.
Ethernet Connection
An Ethernet connection that supports
100BASE-TX (100 Mb/s over twisted-pair)
is required for the Model 43D’s Dante
Audio-over-Ethernet connectivity. A
10BASE-T connection is not sufficient
for Model 43D operation. A 1000BASE-
T (“GigE”) connection is not supported
unless it can automatically “fall back” to
100BASE-TX operation. An Ethernet con-
nection that supports Power-over-Ethernet
(PoE) is preferred as it will provide operat-
ing power for the Model 43D. To support
power management functionality on an
associated PoE switch (PSE) the Model
43D will enumerate itself as a PoE class 3
(mid power) device. If PoE is not available
an external 12 volt DC power source can
be connected. This will be discussed later
in this section of the guide.
The 100BASE-TX Ethernet connection
is made by way of a Neutrik etherCON
protected RJ45 connector that is located
on the back panel of the Model 43D. This
allows connection by way of a cable-
mounted etherCON plug or a standard
RJ45 plug. The Model 43D’s Ethernet
interface supports auto MDI/MDI-X so that
using a crossover or “reversing” cable will
not be required.
External 12 Volt DC Input
An external source of 12 volts DC can be
connected to the Model 43D by way of a
4-pin male XLR connector which is located
on the back panel. While the requirement
for the external source is to be nominally
12 volts, correct operation will take place
over a 10 to 18 volt range. The Model
43D requires 1.0 amperes maximum at
12 volts DC for correct operation. The DC
source should be terminated to a 4-pin
female XLR connector with pin 1 negative
(–) and pin 4 positive (+). Purchased as
an option, the PS-DC-02 power supply is
available from Studio Technologies. Its AC
mains input allows connection to 100-240
volts, 50/60 Hz and its 12 volt DC, 1.5
amperes maximum output is terminated
on a 4-pin female connector.
As previously discussed in this guide, an
Ethernet connection that provides Power-
over-Ethernet (PoE) can serve as the
Model 43D’s power source. Alternately,
an external 12 volt DC source can be con-
nected. For redundancy, both PoE and an
external 12 volt DC source can be con-
nected at the same time. If both PoE and
an external 12 volt DC source are connect-
ed, power will be drawn only from the PoE
supply. If the PoE source becomes inoper-
ative the 12 volt DC source will provide the