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COM3
● The port (COM3) provided 3-wire RS232 on D_SUB9-male connector.
● The connector D_SUB9 is shared with RS485/422 format.
● Due to a terminating resistor 120 Ohm has been installed inside. COM3 has
to enable as master or the last slave device while COM3 be dedicated to work
in mode RS485/422.
● Working mode RS232 and RS485/422 can not be enable in simultaneously.
COM4
●The port (COM4) provided 3-wire RS232 on two pin headers of extension port2.
PC_Rx
PC_Tx
RX3
TX3
GND
GND
COM3
D_SUB9/male
COM3
PC or equivalent
Header 2x7pin, pitch 2.0mm
Extension Port2
COM4
COM4
PC or equivalent
PC_Rx
TX2
RX2
A2/Y2
B2/Z2
PC_Tx
PC_A/Y
PC_B/Z
GND
GND