Positron Teleline 751109/15, Описание и установка

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8-card Shelf CCC model 751109/15
3.6.1 Internal Power Supplies Configurations
When using the internal power supplies, multiple configurations can be used
depending on the installation and reliability desired.
1. Where reliability and down time are not a concern or shelf circuits are not
critical, a single Power Supply can be used.
If powered from 48 V station batteries a 751316 will be used to provide -24
Vdc to the shelf or a 751319MC to provide -48 Vdc to the shelf.
If powered from 120 Vac or 130 Vdc, then a 751313MC or 751318MC will be
used depending on the cards to be powered.
If no battery backup is required (when running off 130 V batteries), then a
751318MC is recommended to provide -48 Vdc to the cards.
For installations that have a mix of cards that operate from both voltages, the
same shelf can hold either a 751313MC and a 751318MC or a 751316 and a
751319MC.
The alarm circuit from the power supplies can be used to generate an alarm in
case of an input power down or a power supply failure.
2. Where reliability is very important or circuits are critical and 48 Vdc or 130 Vdc
batteries are available, the shelf should be powered using the station batteries
to provide an uninterruptible power source. In this case two 751316,
751313MC or 751318MC should be used for redundancy. Both power
supplies would share the load and if one of them was to fail, the second would
take over the full load. The power supply that failed would generate an alarm
even if the system was still running, letting the technician know that a power
supply needs servicing or replacement.
3. Where reliability is very important or circuits are critical but there is only
120 Vac available, the shelf should use a 751313MC power supply with a
751312 battery back-up module to provide an uninterruptible power source. In
case of a power outage or a power supply failure, the battery back-up module
will take over and the power supply will generate an alarm to let the technician