User's Manual

Mobile WiMAX RAS SPI-2213 System Description/Ed.00
© SAMSUNG Electronics Co., Ltd. 3-13
3.2.4 Cooling Structure
DU
The DU of the SPI-2213 maintains the inside temperature of the shelf at an appropriate
range using a set of system cooling fans (FAN-FD48), so that the system can operate
normally when the outside temperature of the DU shelf changes.
Figure 3.7 Fan Configuration
Board Name Quantity Function
FAN-FD48 1 FAN Module-Flexible Digital unit -48 VDC
DU cooling fan
The cooling structure of the DU in the SPI-2213 is as follows.
Figure 3.8 Cooling Structure of the DU
The FAN-FD48 has a built-in temperature sensor.
RRH
The RRH of the SPI-2213 is designed with a natural cooling system that supports an outdoor
environment with no additional fan or heater.
FAN-FD48