Cisco Systems ONS 15200 manual Power Distribution Panel, Fan Unit, Status Cause

Chapter 3 Product Hardware

Modularity and Ancillary Equipment

Figure 3-3 A functional view of the ONS 15201 SCU

TO AND FROM THE CLIENT LAYER

(EXTERNAL TO THE ONS 15200 SYSTEM)

A-SIDE

OPTICAL

TO AND FROM	IN
THE DWDM LAYER	OUT

Tx
A	B
	CLIP
	CFM
	B-SIDE
	OPTICAL
	OUT	TO AND FROM
	IN	THE DWDM LAYER

LEGEND
A - A side	54636
B - B side

CFM - Collector Filter Module

DWDM - dense wavelength division multiplexing

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 3-1lists the LED status and cause of alarm.

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
	Cisco ONS 15200 Product Description
3-4			78-13766-01