C-more micro EA1-S6ML - Page 124

6–36
Chapter 6: PLC Communications
6
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EA1-MG6-USER-M Hardware User Manual, 1st Ed. Rev C, 09/10
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RS-422A/RS-485A Multi-Drop Wiring Diagram Examples (cont’d)
Note: We recommend Belden 88102 shielded cable or equivalent.
shield
7
RTS+
CTS–
CTS+
RTS–
RXD+
TXD+
RXD–
TXD–
GND
DirectLOGIC
DL205 PLC
DirectLOGIC
DL06 PLC
HD = High Density
6 10 13 9 11 14 12 15
15-pin
HD D-sub
(male)
8 = do not use
7 = Sig GND
6 = RXD–
5 = do not use
4 = do not use
3 = do not use
2 = do not use
1 = do not use
15 = CTS–
14 = CTS+
13 = RXD+
12 = RTS-
11 = RTS+
10 = TXD–
9 = TXD+
1
6
15
7
RTS+
CTS–
CTS+
RTS–
RXD+
TXD+
RXD–
TXD–
GND
6 10 13 9 11 14 12 15
TXD+ / RXD+
TXD / RXD
Signal GND
TXD+ / RXD+
TXD / RXD
Signal GND
Typical RS-485 Multi-Drop Wiring Diagram
Port 2
Shielded Cable
Shielded Cable
To DL06 PLC port 2
Port 2
To D2-250-1 PLC port 2
*
* Termination resistors required at both ends of
the network to match the impedance of the cable
(between 100 and 500 ohms).
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