Harmonic NSG 9108, Установка оборудования

Страница: 61 / 83

Appendix B
Wiring the –48 VDC Power Supply
If your NSG has the optional –48 VDC power supply, follow these steps
to wire the power supply.
Getting Started
Before you begin wiring the –48 VDC power supply, make sure that you
provide the necessary overcurrent protection, wires, and power
connector.
Power Source Specifications
The DC power source feeding the NSG device must meet the following
requirements:
■
Electrically isolated from any AC power source
■
Positive ground. The Positive bus of the DC power source must be
reliably connected to the Ground bus.
Each feed-pair must provide a continuous supply of power that meets the
following specifications:
Parameter Specification
Voltage 36 to 75 VDC
Max. operating current 4 amps
Max. input surge current 35 amps