Unipulse F371, Руководство по эксплуатации

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15.RS-485 COMMUNICATION INTERFACE(OPTION)
97
- One-to-One Connection
- One-to-more Connection
Use a twisted pair cable for connection. (The noise margin will increase.) However, a
twin cable is sufficient for short-distance connection. Couple a terminal resistor of 100 -
200
Ω
to the receiving end.
(The terminus resistance by the side of F371 can be switched by setup.120 ohms is
conncted when terminus resistance is set as ON.)
A
B
SD
A
B
RD
A
B
RD
A
B
SD
A
B
A
B
F371
PLC
Host Computer etc.
end reg
end reg
（ Master ） （ Slave ）
A
B
RD
A
B
SD
A B A B
SD RD
A B A B
SD RD
A B A B
SD RD
A B A B
SD RD
end
Twisted pair cable
F371 F371 F371 F371
end