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2.4 Serial port installation
FES91W supports three sets of RS232 or two sets of RS485 (option) or two sets of
RS422 (option).
COM2
●The port (COM2) provided 5-wire RS232 on D_SUB9-male connector.
●The connector D_SUB9 is shared with the signals of RS485/422.
●Due to a terminating resistor 120 Ohm has been installed inside. COM2 has
to enable as master or the last slave device while COM2 be dedicated to work
with mode RS485/422.
●Both working mode of RS232 and RS485/422 can not be enabled in simultaneously.
COM2
D_SUB9/male
COM2
PC or equivalent
PC_Rx
TX1
RX1
RTS1
CTS1
A1/Y1
B1/Z1
PC_Tx
PC_CTS
PC_RTS
PC_A/Y
PC_B/Z
GND
GND
