Platinum Z5 CD, Руководство пользователя

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WARNING: Disconnect primary power prior to servicing.
Overall System Theory
4.7.4.3 Crossover (XOVER) Protection
Each PA Controller has what is called a Watchdog Timer. The outputs of the
watchdog timers are each monitored by the other PA Controller. If the pulses from
the watchdog timer are interrupted, due to either hardware or software problem, the
other PA Controller will initiate what is called a Crossover (or XOVER). Basically,
the operational PA Controller will apply a mute to all of the PAs associated with the
defective PA Controller, and switch them out of circuit before releasing the mute on
its own PAs. Maximum power output with one PA Controller out is approximately
33% of nominal.
NOTE:
The Power Supplies, PS1 and PS2, each power the PAs associated with the
same number PA Controller. This means that the loss of one power supply
will create the same scenario as loss of one PA Controller (the loss of 2 PA
per foursome).
4.7.4.4 PA Controller Faults
For a complete listing of the faults associated with the PA Controllers refer to
Section VI, Troubleshooting.
4.7.5 Power Supply Controller
There is only one PS Controller Board in the standard Z5 transmitter. It is capable of
controlling both of the Z5 power supplies completely independent one from another.
This allows one of the supplies to have a critical failure and be shut off without
interrupting the operation of the second supply. However, a second PS Controller
can be added as an option, to increase redundancy by having one controller board
for each supply.
The PS Controller functions include the following:
•
Control of the tap switching which is used to coarsely regulate the power supply
voltage to 52Vdc.
•
Control of the Soft-Start and PA Power Supply Discharge functions.
•
All power supply monitoring and fault detection. These include voltage, current,
temperature and status.