Specifications

Chapter 3: Install the High-Density Media Converter System II
LMC5207A-R3
724-746-5500 | blackbox.com
Page 21
3.3.1 DC Power Wiring, Replacing Power Supply and Fans
DC Power Supply Wiring Instructions
The following image shows the wiring configuration for a 48-VDC power supply in
a negative ground system application. For positive ground system applications
remove the chassis ground shorting jumper and connect it between the positive
terminal and the chassis ground terminal. Alternatively, the chassis grounding
jumper can be eliminated and the chassis ground connected at the power
source. The ground terminal and the negative terminal are not connected inside
the iMediaChassis/3.
NOTE
Incorrect wiring will result in chassis malfunction.
The 3-Slot Desktop Chassis is compliant with Isolated Grounding Plane practices. The
POSITIVE and NEGATIVE terminals are isolated from chassis ground and must have
a ground reference at the power-sourcing equipment.
Power Supply Modules
Power supplies in all models of the 3-Slot Desktop Chassis are fixed, and not
end-user replaceable.
Fans
The 3-Slot Desktop Chassis includes temperature-triggered fans. When the
temperature of the chassis reaches +104° F (+40° C), the two fans activate to
cool the chassis. To test the fans’ operation, hold the Alarm Reset Button down
for 4 to 5 seconds. The fans will activate and then they will turn off when the
button is released. If the fans do not activate, contact Black Box. Fans are not
end-user replaceable.