C-more micro EA1-S6ML Hardware User Manual page 125

RS-422A/RS-485A Multi-Drop Wiring Diagram Examples(cont' d )
Shielded Cable
15-pin
HD D-sub
(male)
8 = do not use 15 = CTS–
7 = Sig GND 14 = CTS+
15
6 = RXD– 13 = RXD+
5 = do not use 12 = RTS-
4 = do not use 11 = RTS+
3 = do not use 10 = TXD–
1 6
2 = do not use 9 = TXD+
1 = do not use
HD = High Density
TXD+ / RXD+
TXD / RXD
Signal GND
Typical RS-485 Multi-Drop Wiring Diagram (cont'd)
®
DirectLOGIC
DL06 PLC
Port 2
Note: We recommend Belden 88102 shielded cable or equivalent.
To DL06 PLC port 2
7 6 10 13 9 11 14 12 15
shield
EA1-MG6-USER-M Hardware User Manual, 1st Ed. Rev C, 09/10
Chapter 6: PLC Communications
C-more
6" Micro-Graphic
Panel
Shielded Cable
15-pin
D-sub
8 = do not use
15 = do not use
(male)
7 = do not use
14 = do not use
15
6 = do not use 13 = Termination
5 = Logic GND 12 = SD– (RS485)
4 = do not use 11 = SD+ (RS485)
3 = do not use 10 = RD– (RS485)
2 = do not use 9 = RD+ (RS485)
1
1 = Frame GND
TXD+ / RXD+
TXD / RXD
Signal GND
Termination resistors required at both ends of the
*
network receive data signals to match the impedance
of the cable (between 100 and 500 ohms). Jumper pin
13 to 9 on the C-more 6" Micro-Graphic Serial Port2
15-pin connector to place the 120
into the network. If the cable impedance is different,
then use an external resistor matched to the cable
impedance.
Port2
(Master)
To C-more Micro-Graphic
Serial Port2
*
5 10 12 9 11 13 1
shield
internal resistor
6–37
6