NM 1
NETWORK MIC PREAMP
INSTALLATION MANUAL
Connections
COBRANET PRIMARY Connector
COBRANET SECONDARY Connector
These Neutrik Ethercon connectors accept CAT 5e Ethernet
cables terminated with the standard RJ-45 plug. They are used
as the Primary and Secondary connections to a LAN carrying
CobraNet data. The Ethercon connectors also accept a Neutrik-
designed housing for RJ-45 plugs (Neutrik NE8MC series)
that is similar to the industry standard XLR connector. This
Ethercon plug is much more rugged than the standard RJ-45; a
version of the housing is available to retrofit over CAT 5e cables
that are already terminated. (Note that certain cables such as
Belden MediaTwist require special strain-reliefs to work with the
Ethercon shell.)
The cabling used to connect the NM 1 to other Ethernet
equipment must be CAT 5e minimum. CAT 6 is also accept-
able. For more information about CobraNet network design,
redundancy, and Primary and Secondary ports, please refer to
the CobraNet website
www.cobranet.info
.
Both the Primary and the Secondary ports fully support PoE
(IEEE 802.3af). For the NM 1 to operate, at least one of the two
Ethernet ports must be connected to a device that is an IEEE
802.3af compliant Power Source Equipment (PSE). Power can
be supplied to the NM 1 through either the unused pairs of the
CAT 5 cable, or in a “phantom power” scheme using the data
pairs. This allows the use of PSE devices from manufacturers
that support either scheme. The NM 1 requests the maximum
power, approximately 13W, on both ports (see data sheet for
more details on power requirements). The PSE must be chosen
carefully to ensure that it can provide full power to every port
that is connected to a NM 1.
COBRANET
PRIMARY
COBRANET
SECONDARY
SWITCHES / LIGHTS
SPEAKER
MIC INPUT
Link / Activity
In Use / Conductor
In Use / Conductor
Link / Activity
Power can be supplied to the NM 1 through either port; it
automatically switches between the ports to support fully redun-
dant system designs. If power is available on both ports, the
NM 1 chooses one as the active power port. PoE supports equip-
ment hot-plugging, so a PSE senses when a load is disconnected
and stops delivering power on that port. To allow the fastest pos-
sible switch-over from the active port, the stand-by port always
draws a minimum current from its PSE so the PSE is awake and
ready to deliver power as soon as the NM 1 needs it. This allows
seamless redundancy in the power supply to the NM 1.
Note the port the NM 1 chooses to power from is indepen-
dent from the port that is being used for CobraNet data.
In Use / Conductor LEDs
There is one yellow LED for each CobraNet port. This indica-
tor lights on the port in use and blinks if the device is also the
Conductor. (More documentation is at
www.cobranet.info
)
Link / Activity LEDs
There is one green LED for each CobraNet port. This indica-
tor lights when Link is established and blinks when CobraNet
network activity is detected.
SWITCHES / LIGHTS Connector
This female DB-15 connector allows an external switch and lamp
panel to be attached for push-to-talk, cough mute, and other
similar functions. It is provided with lugs so that any DB-15 plug
with mounting ears and spring-latches can be used (e.g. Amp
part numbers for the spring latch are 745779-3 (bulk), 745779-2
(two/bag), 745255-3 (bulk) or 745255-2 (two/bag) )
Summary of Contents for NM 1
Page 1: ...NM 1 NETWORK MIC PREAMP...
