Node Dc Powering; Figure 2-2 Bpx Switch Exterior Rear View - Cisco BPX 8620 Installation And Configuration Manual

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BPX Switch Physical Overview

Node DC Powering

The primary power for a BPX switch node is -48 VDC, which is bused across the backplane for use by

all card slots. DC-to-DC converters on each card convert the -48V to lower voltages for use by the card.

The -48 VDC input connects directly to the DC Power Entry Module (PEM). The DC Power Entry

Module (see Figure 2-3) provides a circuit breaker and line filter for the DC input.

Nodes may be equipped with either a single PEM or dual PEMs for redundancy. PEMs are mounted at

the back of the node below the backplane. A conduit hookup box or an insulated cover plate is provided

for terminating conduit or wire at the DC power input. It is recommended that the source of DC for the

node be redundant and separately fused.

Release 9.3.30, Part Number 78-12907-01 Rev. E0, May 2005

BPX Switch Exterior Rear View

Cisco BPX 8600 Series Installation and Configuration

BPX Switch Enclosure

Bpx 8650 Bpx 8680 Bpx 8680-ip