American Dynamics Excalibur 168, Installation And Service Manual

Page: 38 / 90

MP168 Video Switcher/Controller System
INSTALLATION
Redundant Power Supply
Connections
Connections for the redundant power supply are made
to a dedicated terminal on the Power Supply Module
above the primary power inlet (see Figure 2-2B).
1. Remove the primary power to the system by
disconnecting the power supply line cord from its
source.
2. Remove the front half of each module from the
front of the MP168 Bay.
3. Connect the output of the redundant power supply
to the connector terminal provided with the PSM
rear panel using 14 AWG (2.0mm square)
conductors for both powers and grounds (refer also
to Table 2-3).
4. Verify that all connections have been properly
completed. Severe and permanent damage may
occur to the entire system if improperly connected.
5. Insert the pre-wired connector into the receptacle on
the rear panel of the Power Supply Module.
6. Apply power to the redundant power supply and use
a suitable voltmeter to m8VDC and -8VDC
at the point of entry to the bay. Verify that the
voltages match the pin numbers listed in Table 2-3.
Remove the power from the redundant unit.
7. Re-install all front-half modules back into the
MP168 Bay, except for the Power Supply Module.
Again, apply power to the redundant supply and re-
verify the proper voltages. The voltages should
measure b7.75 VDC (±0.25%) and -7.75
VDC (±0.25%) when fully loaded. DO NOT
continue if the voltages do not meet the above
specifications.
8. Using a suitable DC ammeter, measure the current
associated with each +8 and -8VDC input. The
current should not exceed the values specified in
Table 2-2.
9. Remove the power to the redundant supply again.
10. Add the Power Supply Module back into the
MP168 Bay and connect the power supply line
cord. The unit should now be operating normally.
11. Apply power to the redundant unit. The system is
now ready to switch to the redundant supply should
the primary supply fail.
EXT
SYNC
OUT
DATALINE
IN
OUT
IN
CL
ASS 2
W
IR
IN
G O
NL
Y
REDUNDANT
SUPPLY
PRINTER
PORT
ARCNET
LOOP
THROUGH
OUT
1
5
10
Figure 2-2B - Primary and Redundant Power Source Connections
Primary Power
Line Cord
Redundant Power
Supply
Redundant Power Supply
Connector Block
Use 14 AWG Wire
2-6