8
Rear View
Power Connector
Power Switch
Grounding
Power LED
Fan
Second Power Supply
B
screw
screw
Grounding
Intelligent
A
Captive retainer screws
Alarm Relay
(with dual AC Power Supply Modules installed)
Power Supply Module
The MCR9100 Chassis has two Bays for Power Supply Modules
located at the rear of the Chassis. Each Power Supply Module has a
cooling fan that draws air out of the Chassis through front air vents
on all face plates. The Perle MCR1900 Chassis also comes with an
Intelligent Alarm Relay feature that will monitor the Chassis, Fans
and Power Supply Modules for error conditions. The Chassis and the
Media Converter Modules power requirements can be met with one
Power Supply, however a second Power Supply can be added for
power redundancy and load- sharing. If the Chassis has two Power
Supply Modules, the modules will use a load-sharing arrangement in
which they both supply power to the Media Converter Modules and
Chassis. If either Power Supply Module should fail, the other Power
Supply Module will assume responsibility for powering the entire
Chassis, therefore preventing any interruption of service. The
backplane of the Chassis will continue to power both fans even if a
power supply is in a failed state or the power switch is in the Off
position. If either of the Power Supply Modules fail, both alarm
relays will be activated.
Once the alarm has been set, the backplane
will continue to monitor the Power Supply Module to see if the
problem has been corrected and if so the alarms will be reset.
