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TP48200A-HT15D3 Telecom Power (Russia, Megafon)
User Manual
Figure 3-14 TCUA
(1) Power input port
(4) Boolean value port
(reserved)
(7) Indicator
(10) Temperature sensor
port 1
(13) Internal circulation fan
port 2
TEC Working Principle
The TEC cools and heats air over internal and external air circulation. Table 3-13 shows the
TEC working principle. Figure 3-15 shows TEC airflow directions.
Table 3-13 TEC working principle
Function
Cooling
Issue 03 (2019-11-15)
Working Principle
The TCUA controls the TEC04C to cool the internal circulation air. The internal fan
draws the hot air inside the battery compartment into the internal heat sink. The internal
heat sink cools the air and then returns the cooled air to the battery compartment from
the air exhaust vent. At the same time, the external circulation fan draws the external
circulation air into the external heat sink to accelerate the airflow. The air absorbs the
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(2) External circulation fan
port 1
(5) Door status sensor port
(8) Communications port 1
(11) TEC port
(14) Temperature sensor
port 2
3 Components
(3) External circulation fan
port 2
(6) E-label port (reserved)
(9) Communications port 2
(12) Internal circulation fan
port 1
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