2-22
7500 Series Instruction Manual
Section 2 — Installation
Power
Frames may be powered using either an AC power source, or a 48V DC
power source. It is also possible to cable a matrix using an AC power source
and a 48V DC power source at the same time. If a matrix has both AC and
DC power sources available it will use whichever power source can meet
its power level demand. So if the AC power source fails then the DC power
source would feed the matrix, and if the DC power starts to fall the AC
power would feed the matrix. AC and DC power sources are kept separate
with no feedback, so the AC power source will not charge batteries used in
a connected DC power source.
AC Connections
The 7500NB 256x256 and the 7500WB 128x128 come with one power
supply. The 7500WB 256x256 comes with two power supplies. Redundancy
is provided by adding additional power supplies.
48V DC Connections
WARNING
Do not apply a 48V DC power source until all 48V DC connections on the
7500 matrices are complete and secure.
7500NB 48V DC
The 7500NB 48V DC connection requires 12 AWG (3.31 mm
2
) wire and a 3-
pin female terminal block connector. See
Figure 2-19. NB 48V DC Connection
VID
REF
AES
REF1
AES
REF2
GSC
0723_00_15_r0
Tighten screws
to secure wires
Positive
Negative
3-pin Male
Terminal Block
Connector
3-pin Female
Terminal Block
Connector
Содержание 7500NB
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