Scientific Atlanta Continuum DVP eXtra Dense QAM Array, System Manual

Page: 56 / 112

Connection of Scientific-Atlanta Equipment to DC Power Sources,
Continued
-48 to -60 V dc Power Source
Some Scientific-Atlanta products can be equipped with a dc power supply, which
accommodates both -48 V dc and -60 V dc Nominal power supply systems. (Normal
Service Voltage Range not exceeding -36 V dc to -72 V dc).
For the allowable nominal voltage, refer to the Ratings/Identification label on your
product.
In this case, the device is provided with a dedicated Mate-N-Lock type connector.
A Power Cord with mating connector is provided in the accessory set of the unit.
For this category of equipment, the safety considerations for handling dangerous
voltages are applicable.
WARNING:
Use the same level of safety precautions for this equipment and power source as
for the AC power source.
For units powered by a -60 V dc Nominal power source, observe the following safety
warnings and guidelines:
•
Use a listed dc rated Branch Circuit protection in accordance with the wire size,
and with a maximum of 15 A current. The circuit protection must be placed in the
hot wire.
•
We recommend a minimum of 1.5 mm² (or AWG16) for 15 A fusing.
•
The -60 V dc power source must be electrically isolated from the Mains ac source
in accordance with the standard of the country where you are installing the
product.
•
The wire size of the cable used to connect a product to the dc distribution module
or bus bar must have the appropriate wire size to avoid overloading.
•
Always wire the protective earth terminal of the dc power supply connector or
cable.
Continued on next page
2-20 Installation 4004949 Rev C