Micro-Aide LDM-1 plug-in, Руководство пользователя

Страница: 22 / 48

LDM User Manual
16
mounting location. The standalone modem comes equipped with four vibra-
tion absorbing rubber feet. It is powered by a 24Vac wall mount transformer
(included with the LDM-1 standalone). Nearby access to 120Vac power is
required. The female connector of the transformer plugs directly into the
round, male connector located at the rear panel of the modem. Refer to
Figure 1 on page 6. The modem is always on when power is connected.
LDM-1 P
LUG
-
IN
The user may find it necessary to install the correct complement of PCBs into
the LDM-16 before the nest can be used. LDM-1 plug-in PCBs are installed
by unfastening the front cover of the nest, depressing the PCB retainer bar
and inserting the PCB into the plastic card guides. The PCB should be pushed
as far forward as possible. The retainer bar should then spring back, locking
the PCB in place. If fewer than nine modems are being installed it is recom-
mended that an empty slot be left between adjacent PCBs. It may be necessary
to remove the plastic shield that covers the rear connector cut-outs before the
PCB can be inserted. Spare plastic shields should be used to cover any vacant
cut-outs.
The nest is equipped with a 120-to-24Vac transformer. The 24Vac power
source must be connected to each PCB. Use the connector harness provided
for this purpose. It can be used to daisy-chain as many as eight PCBs together.
Additional connectors can be easily attached to the end of the standard har-
ness.
LDM-16 N
EST
The LDM-16 nest is a chassis that can be installed in any standard 19" equip-
ment rack. It includes a pair of rack mounting brackets. It is 5.75" high and
requires four rack increments of vertical space. The chassis can be secured at
N
OTE
: The ambient operating temperature of the all LDM products is -4ºF
(-20ºC) to 158ºF (70ºC).
W
ARNING
: The two-position power connector must be inserted on the top
two pins of the PCB's six-position connector. Failure to do so will result in
damage to the PCB.