Instruction manual

3
6. ZM-Link 3-23
Serial Communications
RS-485 (ZM-300 series: maximum 31 sets)
Wiring example of above (a) and (b)
CN1
CN1
CN1
MJ2/1
MJ2/1 MJ2/1
a
b
Exclusive cable
RS-232C
RS-422
RS-485
PLC
PLC
PLC
}
RS-485
}
*
}
*
}
*
Computer
ZM-300
Local
Port 1
ZM-300
Local
Port 2
ZM-300
Local
Port 31
RS-232C →
RS485
conversion
Terminal block Terminal block
Terminal block
* 0.5 m recommended (1.0 m maximum)
+
1
+
−
RS-485
−
2
+
1
−
2
+
−
+
−
a
b
SG
5
SG
5
SG
SG
SG
FG
FG
FG
FG FG
Signal Name
ZM-300
Modular jack, 8-pin
Pin No.
(Black)
(Green)
ZM-300
Modular jack, 8-pin
Signal
Name
(Black)
(Green)
Terminal Terminal
Signal Name Pin No.
Signal
Name
Signal
Name