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MeiG Smart product technical information
SLM500 Hardware Design Guide Page 30
If it is a DC power supply device, the DC input voltage is 5V-12V. The recommended circuit
that can be powered by DC-DC is shown below:
Figure 4.2：DC-DC power supply circuit
Note：If the user does not use battery power, please note that a 47K resistor is connected to the
134 pin (BAT_THERM) of the module and pulled down to GND to prevent the software from
judging the abnormal battery temperature after the module is turned on, resulting in shutdown.
The connection diagram is as follows:
Figure 4.3：Connection diagram when not powered by battery
47K