Mitsubishi FX3U-232-BD User Manual page 232

FX Series PLC User's Manual - Data Communication Edition
Computer Link
4.5 Connection Diagram for RS-485 and RS-422
4.5.1 One-pair wiring
Communication
equipment operating
in accordance with
RS-485
SDA
Terminal
SDB
resistor:
110 Ω
RDA
*3
RDB
LINK
SG
*1 Make sure to perform Class-D grounding to the shield of a twisted pair cable connected to the FX
FX -485-BD, FX
3U 2NC
*2 Make sure to connect the
If the grounding terminal is not provided in the PLC, perform Class-D grounding directly.
*3 Make sure to provide a terminal resistor at the end of each line.
The FX -485-BD and FX
3U
Set the terminal resistor selector switch accordingly.
The FX -485ADP, FX
0N
4.5.2 Two-pair wiring
Communication
equipment operating
in accordance with
RS-485/RS-422
SDA
SDB
*3
RDA
RDB
*3
Terminal
resistor:
LINK
330 Ω
× 2 SG
*1 Make sure to perform Class-D grounding to the shield of a twisted pair cable connected to the FX
FX -485-BD, FX
3U 2NC
*2 Make sure to connect the
If the grounding terminal is not provided in the PLC, perform Class-D grounding directly.
*3 Make sure to provide a terminal resistor at the end of each line.
The FX -485-BD and FX
3U
Set the terminal resistor selector switch accordingly.
The FX -485ADP, FX
0N
D-30
FX -485ADP
0N
SDA
SDB
RDA
RDB
LINK
SG
FG *2
-485-ADP or FX -485ADP(-MB).
3U
FG
terminal to the
-485ADP(-MB) have a built-in terminal resistor.
3U
-485ADP, FX -485-BD and FX
2NC 2N
FX -485ADP
0N
SDA
SDB
RDA
RDB
LINK
SG
FG *2
-485-ADP or FX -485ADP(-MB).
3U
FG
terminal to the
-485ADP(-MB) have a built-in terminal resistor.
3U
-485ADP, FX -485-BD and FX
2NC 2N
FX -485-BD
3U
FX -485-BD
2N
FX -485-BD
1N
FX -485ADP(-MB)
3U
SDA
SDB
RDA
RDB
SG
Class-D grounding
(resistance: 100 Ω or less)
*1
(grounding) terminal in the PLC requiring Class-D grounding.
-485-BD are supplied together with terminal resistors.
1N
FX -485-BD
3U
FX -485-BD
2N
FX -485-BD
1N
FX -485ADP(-MB)
3U
SDA
SDB
RDA
RDB
SG
Class-D grounding
(resistance: 100 Ω or less)
*1
(grounding) terminal in the PLC requiring Class-D grounding.
-485-BD are supplied together with terminal resistors.
1N
4.5 Connection Diagram for RS-485 and RS-422
FX
Class-D grounding
(resistance: 100 Ω or less)
*1
-485-BD, FX -485-BD,
2N 1N
FX
Class-D grounding
(resistance: 100 Ω or less)
*1
-485-BD, FX -485-BD,
2N 1N
4 Wiring
-485ADP
2NC
SDA
Terminal
SDB
resistor:
110 Ω
RDA
*3
RDB
SG
-485ADP
2NC
SDA
SDB
*3
RDA
RDB
*3
Terminal
resistor:
330 Ω
× 2
SG