TCX1000-RDM20 Cooling System Description
The cooling system in a TCX1000-RDM20 consists of two fan modules installed in the field-replaceable unit (FRU) panel and each power supply has a dual rotor counter-rotating fan in them.
In the TCX1000-RDM20’s cooling system, cool air enters through the vents in the front panel and hot air exhausts through the fans in the FRU panel. This type of airflow is known as airflow out or front-to-back airflow. When installed, the chassis must be positioned so that the FRUs are next to the hot air exhaust.
Under normal operating conditions, the fan modules operate at a moderate speed. Temperature sensors in the chassis monitor the temperature within the chassis. The system raises an alarm if a fan module fails or if the ambient temperature inside the chassis rises above the acceptable range.
The fan modules in a TCX1000-RDM20 are hot-removable and hot-pluggable
FRUs. These fan modules can be hot-swapped—you do not need to
power off the TCX1000-RDM20 or disrupt the TCX1000-RDM20 function
to replace a fan module. The TCX1000-RDM20 continues to operate for
a limited period of time (two minutes) during the replacement of the
fan module without thermal shutdowns. Fan module slots are numbered
1 from left to right when
viewing chassis from the FRU panel side (see Figure 1). Figure 2 shows the fan module for the TCX1000-RDM20.
Both fan modules must be installed for optimal operation of the TCX1000-RDM20, if there is only one fan than there will be no redundancy.
Table 1: TCX1000-RDM20 Fan LED
Fan LED (located left side of fan)
Fan is operating normally.
Fan module has failed.
Airflow Through the Chassis
In the TCX1000-RDM-20 cooling system, cool air enters through the vents in the port panel and hot air exhausts through the FRU panel. This type of airflow is known as airflow out or port-to-FRU airflow. When the chassis is installed, it must be positioned so that the FRUs are next to the hot aisle. Figure 2 shows the airflow through the chassis.