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phn-4750_003v006
Chapter 6
Power Supply Notes
When selecting a power source, the following must be considered:
•
Voltage range: -40 VDC to -60 VDC.
•
Recommended: Availability of a UPS (Uninterrupted Power Source), battery backup, and
emergency power generator.
•
The power source must be grounded.
•
The unit has more than one supply connection - Remove all power from the unit for servicing.
Note
Make sure to use a circuit breaker to protect the circuit from damage by short or overload.
In a building installation, the circuit breaker shall be readily accessible and incorporated
external to the equipment. The maximum rating of the overcurrent protection shall be 10
Amp, while the maximum current rating is 6.5A (@40V in) when operating with five
carriers, and 7.5A when operating with five carriers and an STM-1 module (optional,
planned for future release).
