Grass Valley NV5256 v.1.8 - Manual (Page 27)

NV5256 Machine Control Router • User’s Guide 19
3. Detail
Power
Connectors
At the middle right portion of the rear of the NV5256 frame are 2 AC connectors:
The NV5256 frame has one (IEC) 3-conductor power connection for each of its 2 power supplies.
These should be connected to a 90–130VAC or 180–250VAC 15A grounded circuit wired in accor-
dance with local electrical codes.
Fuses for both AC power inputs are located on their respective power supplies. Ensure that the fuse
ratings comply with specific requirements in your area. A 7.5A fuse is required for 110/120VAC
applications. For 220/240VAC operation, a 3.75A fuse is required.
For increased protection against loss of power, we suggest that each power supply be connected to
a separate branch circuit. A wire bail can be used to grip the power cable and hold it in place to
reduce the possibility of accidental loss of power.
The power cords represent the only means of disconnecting main power from the NV5256. Make
sure to clearly mark the line side power connection with its function so that in the event of an emer-
gency, power can be disconnected quickly. Make sure to disconnect both power cords before ser-
vicing any internal frame components.
Power Supply
The PS6100
1
power supply accepts a wide range of AC input voltages and produces five +48 VDC
outputs. Each of the five circuits producing the +48 volt outputs is identical. The power supply
automatically senses the AC input voltage (90–130VAC or 180–250VAC) and adjusts itself to
maintain a relatively constant DC output. You do not have to select the voltage. The five regulated
outputs are directed to the various regulators that produce the DC voltages required by the local cir-
cuits.
Each +48VDC output powers one of the five green LEDs and output test points on the front of the
power supply. Under normal operation, all five LEDs should be on. If any is not, it is likely that the
corresponding branch circuit has failed. When the power supply output voltages are measured at
the test points, the voltage should be approximately +48 VDC under a full load. If modules have
been removed from the frame or options are not installed, some or all of the test point voltages
could be somewhat higher than +48VDC.
PLEASE READ
INSTRUCTION
MANUAL BEFORE
CONNECTING
EQUIPMENT TO
THE MAINS
PS 1
LEFT
PS 2
RIGHT
REF
OUT
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9-12
AC connector
for PS 1
AC connector
for PS 2
1. Older master control frames in the field might still use PS6000 power supplies.