Note1: RS-232: RXD, TXD, GND
Signal lines are RXD, TXD and GND
Program download port
Note2: RS-485: Data+, Data-; Self-tuner inside
Note3: RS RS-232: RXD, TXD, CTS, RTS, GND
or RS-485: Data+, Data-; Self-tuner inside
Note4: RS-232: RXD, TXD, CTS, RTS, DSR, DTR, DCD, RI, GND
Note5: iP-8441 & iP-8841 have COM2(RS-485) and dual Ethernet (10/100 Base T)
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