PWS-to PLC (FX2N/FX0N)
HMI-COM port PLC-prot RS422
25-PIN female---------------CABLE------------8-PIN male
TXD+ 14--------------------------------------2 RXD+
TXD- 15--------------------------------------1 RXD-
RXD+ 16--------------------------------------7 TXD+
RXD- 17--------------------------------------4 TXD-
21--和上方的17短接 3 SG
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