7. SAFETY FEATURES
Enhanced SmartDrive40 incorporates some safety features which make it robust and reliable
motor driver. Below are the detailed descriptions for each feature.
a.
Input Error (Error LED blinks 2 times)
Every time Enhanced SmartDrive40 is power up, the input data must be ‘stop’ (for
RC, Analog, PWM input mode). This feature prevent the driver from sudden run,
especially when the driver accidently reset.
b.
Under Voltage Warning (Error LED blinks 3 times)
Upon power on, Enhanced SmartDrive40 will automatically detect the number of
cells for the battery. If it is set to LiPo, when the input voltage falls below 3.0V per
cell during operation, the error LED will blink to warn the user. However, the power
to the motor will be maintained and will not be cut out. Thus, it is user’s responsibility
to stop the motor driving and replace battery to avoid further damage to the battery. If
other types of battery is used to power the board (e.g NiMH, NiCD, SLA), the under
voltage warning will still be shown. In this case, user may ignore the warning and
he/she needs to estimate when to replace the battery by him/herself.
c.
Over Voltage Protection (Error LED blinks 4 times)
If over voltage is detected (> 45V), Enhanced SmartDrive40 will not operate.
d.
Over Temperature Protection (Error LED blinks 5 times)
Enhanced SmartDrive40 is equipped with a temperature sensor to monitor its
operating temperature. It will gradually lower down the duty cycle percentage base on
the temperature as shown below:
Temperature Range (
o
C)
Current (A)
< 50
80
50 – 70
50
70 – 100
45
100 – 110
40
> 110
35
Note:
MDS40B does not come with polarity protection, please double check the
connection before powering up.
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