Power Interface Modules (Pims); Location And Physical Description Of The Pims; Pim Faceplate - Nortel Passport 15000 Hardware Description

Power interface modules (PIMs)

Location and physical description of the PIMs

PIM faceplate

The power interface modules (PIMs) pass power from the breaker interface
panel (BIP) into the shelf assembly. This section provides the following
information about the PIMs:
• "Location and physical description of the PIMs" (page 107)
• "PIM faceplate" (page 107)
• "PIM cable assembly" (page 110)
• "Power LED status indicators for PIMs" (page 110)
• "PIM cable assembly" (page 110)
Four power interface modules (PIMs) are located along the left side of the
rear of the shelf assembly. See the figure "A shelf assembly of a
Passport 15000 without fabrics, rear view" (page 90).
Each PIM provides a point at which power cables from the BIP are connected.
Each shelf assembly contains four PIMs: two for A power feeds and two for
B feeds. See "Function of the BIP backplane power input connections"
(page 74) for more information about how input power feeds from the BIP are
routed to each shelf. Each PIM provides separate power filtering for the
portions of the shelf it supports. The PIMs also provide termination for the
shelf clocks and for the secondary control bus.
The PIM is a field-replaceable unit; however, the shelf must be powered down
from the appropriate BIP circuit breakers and the PIM power cables
unplugged before the module can be removed.
The side of a power interface module (PIM) where the power cables from the
BIP are connected. The faceplate is designed such that you cannot remove
PIM unless the power cable is removed first. This protects the backplane pins
from arcing if the PIM is pulled with the power left on. The figure "Faceplate
of a PIM on a Passport 15000" (page 109) shows the opening for the
connection point.
Passport 15000, 20000 Hardware Description
Chapter 3 Shelf assembly 107
5.2S2