User's Manual

Mobile WiMAX Indoor RAS SPI-2210 System Description/Ed.07

The indoor SPI-2210 keeps the internal temperature of the rack to ensure the normal

operation of the system as shown in the figure below:

Figure 3.7 Radiation Structure of Indoor SPI-2210

The FCM as a fan controller of the indoor SPI-2210 detects the internal temperature of the

system via the temperature sensor attached inside the system and controls the speed of the

fan rotation. The FCM collects the fan status as Open (fault)/Close (Normal) and reports to

the upper layer.

DMB cooling fan (FAN-PID) and RFB cooling fans (FAN-PIR) controlled by the FCM

operates in low speed when the system internal temperature is low and in high speed when

high.

Hot Air Exhaust

Cool Air Intake

Dust Filter

Top Space

FAN

MRU

Air Baffle

MCU

MRU

Air Baffle

AICU

DMB Cooling Fan

MRU-2 Cooling Fan

DMB

Air Baffle

FAN