Motorola SURFboard SBV5322 Installationsanleitung PDF herunterladen (Seite 15)

Chapter 1: Introduction 7

M-eMTA Component Overview Descriptions

This section provides an overview of the M-eMTA components.

Power Supply

The chassis can accept a nominal input of 90 VAC (70 VAC lower limit) from the

HFC network, +12VDC UPS power, or up to 120 VAC from facility power:

• HFC Network Power – Power source is derived from the normal HFC

90 VAC power on the cable plant and is extracted for M-eMTA use

with a readily available power tap with a Siamese twisted pair power

output. This power input is routed to internal supplies that convert

the AC input to +12 VDC output for the M-eMTA blades and chassis.

• UPS Power – Power is supplied by a local UPS battery backup system

that supplies +12 VDC to the M-eMTA. Note that no power supply

modules are installed for this powering option.

• AC Facility – Power is derived from a standard 120 VAC at the installa-

tion location. This power input is routed to internal supplies that con-

vert the AC input to +12 VDC output for the M-eMTA blades and

chassis.

The following illustration provides an overview of the power supply.

WARNING: Although different power configurations are available, only one

powering option can be used at a time.

When servicing requires the equipment to be powered down, make sure

all power sources have been disconnected.

Power Supply Component Name

1. Power supply module

(Not used for UPS-powering of

the M-eMTA.)

2. AC OK LED – When the LED is

solid green, the AC input volt-

age to the power supply is

within specification.

3. DC OK LED – When the LED is

solid green, the DC output volt-

age from the power supply is

within specification.

4. T10 Torx screws

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Motorola SURFboard SBV5322 Installationsanleitung Seite 15