Smart Machine Smart Decision
Table 2: The consumption in sleep mode
T900 @5V @12V @15V
Sleep current
14.5mA 7.75mA 5.02mA
The following chapter introduces the power line that SIMCom provides to customers, customer can power the
terminal by connect the terminal to the DC source via this line.
The power line includes four lines as the following figure shows, and table 3 gives a detailed description.
Table 3: The power line assignment
PIN Number Colour Item
1 white NC
2 Red Power
3 Yellow NC
4 Black Ground
Figure 8: dimensions of power line
（Unit: mm）
Figure 9: Power interface
When a valid power appears the terminal will power up automatic, for the MCU that inside the terminal processed
the power up part, MCU also acts as a Watch Dog, when the terminal runs wrong, MCU will cut off the power
and recover it immediately to restart the terminal.
T900_User Guide_V1.02 14 2013-05-22
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