Integrator's Manual

18
3.2 COM200 Rear View
Figure 3 – COM200 Rear View
Figure 3 above shows the rear of the COM200 chassis.
The two AC input connections shown at the bottom right provide power to the COM200 chassis.
Only a single AC input connection is required in order for the system to operate. However,
utilizing both AC input connections creates a DMR (Dual Modular Redundant) system. In other
words, the second power unit acts as a backup in case the first power module fails, providing a
seamless transition to a functioning power supply. In the case of such an event, the rear
mounting bracket just below the power supply fans must be removed in order to replace the
failed module. It should be noted that the power supplies are hot-swappable.
The COM200 chassis also contains two 5-inch exhaust fans to provide cooling to the system.
Airflow is pulled through the ventilation grate on the front of the COM200 chassis across the
COM24 cards and out the back. In the case of an equipment failure, the COM200 chassis can
run with just one fan without overheating, but it is recommended that the broken fan is serviced
and/or replaced as soon as possible.
The COM200 chassis also contains an integrated Gigabit Ethernet (GbE) port. This port provides
the means of routing all COM200 traffic an external edge QAM. If a QAM24 card is installed
the external GbE port will NOT available for use as that port will be used to route traffic to the
QAM24 card.
Exhaust Fan 1
Rear Mounting
Bracket
Gigabit
Ethernet
Port
AC Input 1
AC Input 2
Power
Supply Fans
Exhaust Fan 2