JMB4 user’s manual
20
3.3 Serial port pin assignment
Note: Serial port pr5V max current 500mAh
Note: Serial port is available on T4 model
Pin
Printer side
1
N/C
2
TXD
3
RXD
4
DSR
5
GND
6
DTR
7
CTS
8
RTS
9
+5V
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