American Dynamics Excalibur 168, Installation And Service Manual

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DESCRIPTION
MP168 Matrix Switcher/Control System
POWER SUPPLY MODULE
The Power Supply Module (PSM) features an on-
board switching power supply that converts 90-240 volt
(47-63Hz) AC input power to ±8 volt DC power for
internal use by all system modules.
In the event of a loss of AC power, the Power Supply
Module has provisions to accept an ±8 Volt DC
redundant power source (not provided). An internal
monitoring circuit senses the loss of primary voltage
and automatically switches to the redundant power
supply, effectively eliminating any disturbance to
system functions.
The Power Supply module also provides a 0-5VDC
square wave “Line-Sync” signal that is in-phase and
synchronized to the primary power source to
automatically synchronize internal switching functions.
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The Power Supply Module always resides in
slot R (determined by the lettered slot
designation screening on the front and rear bay
surface). See Figure 1-4A.
The front and rear sections of the Power
Supply Module are identified with a RED
color code dot affixed to the respective
section.
The Power Supply Module includes the following
components:
PSM Circuit Card
PSM Rear Panel Assembly consisting of:
Rear Panel and Rear Panel Circuit Card
Power Supply Module Features
A.
Printer Port
The Rear Panel of the PSM provides a parallel port
(labeled A in Figure 1-4D) to connect to a system
printer for outputting operating events and setups.
B.
Data Line BNC Connectors
The PSM provides high-speed data line BNC
terminals (labeled B in Figure 1-4D). The IN/OUT
terminals are for looping to external system bays.
The second data line OUT terminal provides
MP168 data line outputs to external devices such
as Control Code distributors and receivers.
Front View
A B C D E F G H I J K L M N O P Q R
Rear View
A B C D E F G H I J K L M N O P Q
R
Figure 1-4A - MP168 PSM Slot Designations (Front & Rear)
PSM Installation Slot (R)
Figure 1-4B - PSM Circuit Card In Bay
PSM Circuit
Card
1-4