Instruction manual

3
7. PLC2Way 3-33
Serial Communications
Wiring
Two kinds of cables are available for PLC2Way connection at the MJ port. Cable
connections are explained.
Connecting method 1 (using ZM-300CC)
• To connect the PLC and the ZM-300 series at the MJ port, use the MJ to D-sub
conversion cable “ZM-300CC” (0.3 m, metric thread) and the cable for 1 : 1 connection
at CN1. For more information on the cable for 1 : 1 connection at CN1, refer to “Wiring”
in “Chapter 5 Connection to PLCs.”
• This combination of cables (ZM-300CC + 1 : 1 connection cable) can be used either for
RS-232C or RS-485 (RS-422) 2-wire connection.
• With RS-485 (2-wire connection), a maximum of 31 PLCs can be connected. For
information on connection between PLCs, refer to the instruction manual for the PLC.
Connecting method 2 (using exclusive cable)
• Use exclusive cable (3 m) when connecting the ZM-300 series to a PLC at the MJ port.
The shielded frame ground of exclusive cable must be connected to the ZM-300 series.
* Notes on Use of exclusive cable
There are six wires in the exclusive cable as
shown on the right. The wires to be used are
determined depending on the connecting
method. For the wires not used, be sure to
properly insulate with tape, etc.
<RS-232C Connection>
• Connection example with MITSUBISHI A1SJ71UC24-R2
<RS-485 Connection>
run
(RS-232C, RS-485/RS-422)
MJ2/1
F1
F2
F3
F4
F5
F6
F7
SYSTEM
POWER
ZM-300CC
1 : 1 connection cable
ZM-300
series
: 0V SG
: RXD
: TXD
: +5V
: +SD/RD
: −SD/RD
Exclusive cable
Brown
Red
Orange
Yellow
Black
Green
PLC
D-sub 9pin(Male: )
FG
SD
RD
SG
8
7
5
RD
SD
RS
CS
DR
SG
CD
1
2
3
5
6
7
8
* Use the shielded cable.
ZM-300 series
Modular jack, 8-pin
(Yellow)
(Orange)
(Red)
D-sub 9-pin (male)