BECKWITH ELECTRIC BlueJay M-2911 Manual - Halaman 7

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RS-422 is a dual shielded, twisted pair (four wires plus two shields), from M-2911 to one IED.
M-2911
RS-422
SGND
D -
RX
D+
D -
TX
D+
SGND
RS-422 network is a dual shielded twisted pair (four wires plus two shields), from M-2911 to IEDs in parallel.
M-2911
RS-422
SGND
1
2
D -
RX
3
D+
4
D -
TX
5
D+
6
SGND
200
1
2
3
4
5
6
Figure 3 RS-422 Example IED
IED's In Parallel
200
Figure 4 RS-422 Network Example IED's in Parallel
M-2911 BlueJay Universal Data Transceiver
200
IED
–7–
IED
IED
200