Introduction 1 - 3
Back Panel
A power supply and DC fan unit are installed when yo u receive your
concentrator. There is an On/Off switch on the power supp ly. The power
supply should be powered down when you install or remove it. Note that
there is no need to powe r down the concentrator for installation or
removal of the media modules. Additionally, you can replace the fan unit
with an optional backup power supply to provide power redundancy.
Figure 1-2. ONline System Concentrator Rear V iew
Front Panel
The concentrator is shipped wit h 15 blank faceplates and two empty slots.
The two slots are left empty b ecause you must install the ONline Controller
Module and at least one media module for the concentrator to be
functional. As you ad d media modules to your unit, remove blank
faceplates to provide additional slots for the new modules.