Cisco RFGW-10, Руководство по установке оборудования

Страница: 24 / 182

1-10
Cisco RF Gateway 10 Hardware Installation Guide
OL-16264-04
Chapter 1 Overview
Cisco RFGW-10 Components
DC PEMs
The Cisco RFGW-10 system is powered by redundant DC PEMs. An individual PEM is capable of
providing 4536 watts of total output. The redundant modules work as a 1:1 redundancy configuration
and support OIR (hot swapping). These modules do not support current sharing as they are non-isolated
PEMs, which are diode OR'd into two separate load zones.
Each PEM includes two 60A input lines that operate between –40VDC and –60VDC input voltages.
Proper configuration and operation requires that both DC inputs are properly wired. The PEM also
includes an earth ground connection (this is not power return) for grounding the chassis.
Note
Each DC PEM has an earth ground connection and two DC power input connections (Input 1 and Input
2). Both external DC inputs (Input 1 and Input 2) must be connected as shown in
Figure 1-7 . Input 1 and
Input 2 are individual power inputs. Both power inputs on the PEM must be wired to external power for
the Cisco RFGW-10 UEQAM to operate properly. If both inputs are not connected to external power, the
Cisco RFGW-10 UEQAM will not power on.
DC PEM features:
•
Closed frame, NEBS-compliant module design
•
Front-to-back airflow (exhaust air exits out of the rear of the chassis)
•
Power input range:
–
48VDC to
–
60VDC
•
4536W power capacity
•
Supports OIR (hot swap)
•
Supports 1:1 redundancy (system can run with a single PEM)
•
CLI interface support for status and configuration
•
Remote shutdown feature
•
Front panel LED status and alarm indicators
Note
When both the DC PEMs are installed, both need to operate with the breaker switches and the OUTPUT
OK LED on. If one PEM is not operational, it is recommended that the PEM either be removed from the
system or the power input cables be removed to limit the power supply Conductive Emissions (FCC
conductive Emission Requirements).