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5-4 Smartio CP-168U User’s Manual
DB-25/F Pin Assignment (Opt8F/Z)
DB-25/F Pin Assignment (Opt8K)
MODE
PIN
RS-422
2 RxD+(B)
3 TxD+(B)
7 GND
14 RxD-(A)
16 TxD-(A)
MODE
PIN
RS-422/4-wire RS-485
2-wire RS-485
2 RxD+(B) Data+(B)
3 TxD+(B) ---
7 GND GND
14 RxD-(A) Data-(A)
16 TxD-(A) ---