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Cable management
The cable management tray and cable pillars provide easy access to the 2109
Model M12 cables and allow you to organize and maintain the cables easily. Up to
128 pairs of fibre optic cables can be maintained on a single chassis. The cable
management system is designed to allow any switch module to be replaced without
disrupting service on any adjacent blade assemblies.
Worldwide name LED card
The WWN LED card is the neutral location to accommodate the worldwide unique
serial ID for each logical switch on the 2109 Model M12. It is an integral part of the
chassis. The serial EEPROM device contains multiple serial numbers for identifying
the chassis, back plane, and the WWN card itself.
As an alternative system status indicator, this card consolidates the status of all
modular components in the system on the cable side and presents the status to you
in the form of LEDs on the noncable side. The arrangement of the LEDs on this
card resembles the look of status LEDs on the other side of the switch.
The LEDs provide the summary of cable-side system status on the switch as
follows:
v Two LEDs per blade assembly on the cable side of the cabinet
v Two LEDs per power supply. Both LEDs are in the same location.
Power distribution system
The power subsystem is a redundant +48 V dc power distribution system with a
provision for up to four 1000-watt, 48 V dc bulk power supplies. Bulk power
supplies produce the intermediate distribution voltage in the distributed power
system. See Table 2 for the power distribution system specifications.
– Green indicates that the power is OK.
– Amber indicates that the blade needs attention.
– Green indicates that the power is OK.
– Amber indicates that the power supply needs attention.
Table 2. Power distribution system specifications
Specification
Input voltage
Supported power range
Input frequency range
Power supplies (each)
ac inrush current
Ride through
Value
A fully loaded switch requires a maximum of 2200 Volt-Amps.
This results in a mains current of 9 amps at 240 V ac line
voltage or 10 amps at 208 V ac line voltage.
The rated ac input range is 180 - 264 V ac.
Nominal: 200 - 240 V ac, single phase
47 - 63 Hz
Output voltages: 48 V at 20 amps; 12 V at 4 amps
Maximum output power: 1000 watts
40 amps maximum, peak
The power supply outputs remain within specified regulation
for a minimum of 20 msec after the ac mains are
disconnected.
7
Introduction
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