Chapter - chapter 1, Title - overview, Head1 - powerblade pbc18 chassis – Allied Telesis AT-PBC18 User Manual
Page 19: Chapter 1, Overview, Powerblade pbc18 chassis

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Chapter 1
Overview
PowerBlade PBC18 Chassis
The PowerBlade PBC18 is an 18-slot chassis that is designed to hold up
to 18 PowerBlade Media Converter modules and Switch modules. The
chassis can be used on a desktop or in a 19-, 23- or 25-inch rack.
The front of the chassis has 18-slots for the PowerBlade modules along
with six LEDs to notify you of power and management status. The
chassis also has a Reset button that allows you to reset the optional
management module. (See Figure 1.) The back of the chassis features a
PWR 1 expansion slot for the main power supply, a PWR 2 expansion slot
for an optional redundant power supply module, and an optional
management module expansion slot. (See Figure 2.)
Figure 1 PowerBlade PBC18 Front View
PBC18
PWR 1
PWR 2
STATUS
LINK
100M
FDX
RESET
Status LEDs
Reset Button