Q2BYG403MD Driver User’s Manual
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(3) RS-232 communication interface
Allow connecting to PC serial port through dedicated cable, modify and
save parameters, and monitor the running status through dedicated upper
computer commissioning software.
PIN No.
Name
Symbol
Application
1 5V
power
supply
positive
terminal
+5V
The internal power supply of the
Driver is +5V, and is reserved for
external debugger
2 SCI
transmitter
terminal
TXD
Serial data transmitter terminal
3 SCI
receiver
terminal
RXD
Serial data receiver terminal
4
NC
Reserved
5 5V
power
supply
grounding
GND Power
point
(4) Driver status indicator
The green LED is power indicator. When the power supply of the Driver
is connected, this indicator is constantly on; when the power supply is
cut off, the indicator is off. The red LED is failure indicator. If there is
any failure, this indicator flashes repeatedly in a period of two seconds.
Please see the table below for the details of failure.
Alarm
No.
Flashing
times
LED status
Description
1 1
Open circuit
failure
2 2
Undervoltage
3 3
Overvoltage
4 4
Overcurrent and
short circuit
failure