Cisco ONS 15200 - Manual (Page 30)

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Cisco ONS 15200 Product Description
78-13766-01
Chapter 3 Product Hardware
Modularity and Ancillary Equipment
Figure 3-3 A functional view of the ONS 15201 SCU
3.1.3 Power Distribution Panel
ONS 15200 site configurations can include a power distribution panel (PDP). The PDP distributes power
to the ONS 15200 site and provides power redundancy. It uses input and output fusing to provide system
protection.
3.1.4 Fan Unit
All Release 1.0.1 (or later) ONS 15252 MCU site configurations require a fan unit mounted above the
ONS 15252 MCU in the equipment rack; Release 1.0 shelves do not use the fan unit. The fan unit
contains eight small fans that run simultaneously at constant speed. The fans push air down through the
MCU to cool the CLIP modules. The fan unit is powered by its own dual -48 VDC power inlets
independently of the MCU. If the fan unit fails, it generates an alarm to indicate multi- or single-fan
failure. Located on the front panel of the fan unit are three LEDs to indicate alarm status.
Table 3-1 lists
the LED status and cause of alarm.
A
CFM
OUT
IN IN
OUT
A-SIDE
OPTICAL
B-SIDE
OPTICAL
LEGEND
A - A side
B - B side
CFM - Collector Filter Module
DWDM - dense wavelength division multiplexing
TO AND FROM
THE DWDM LAYER
TO AND FROM
THE DWDM LAYER
54636
Tx
B
TO AND FROM THE CLIENT LAYER
(EXTERNAL TO THE ONS 15200 SYSTEM)
CLIP
Table 3-1 Fan Unit LED Status
LED Status Cause
Red Major alarm Multi-fan failure
Yellow Minor alarm Single-fan failure and/or single
48 VDC failure
Green Normal Power on