Connection Diagram For Rs-485 And Rs-422 - Mitsubishi FX3U-USB-BD User Manual

FX Series PLC User's Manual - Data Communication Edition
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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 -485-BD, FX
3G 3U
*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, 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 -485-BD, FX
3G 3U
*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, FX
3U
Set the terminal resistor selector switch accordingly.
The FX -485ADP, FX
0N
FX -485ADP
0N
SDA
SDB
RDA
RDB
LINK
SG
*2
FG
(resistance: 100 Ω or less)
-485-ADP or FX -485ADP(-MB).
2NC 3U
FG
terminal to the (grounding) terminal in the PLC requiring Class-D grounding.
-485-BD and FX -485ADP(-MB) have a built-in terminal resistor.
3G 3U
-485ADP, FX -485-BD and FX
2NC 2N
FX -485ADP
0N
SDA
SDB
RDA
RDB
LINK
SG
*2
FG
(resistance: 100 Ω or less)
-485-ADP or FX -485ADP(-MB).
2NC 3U
FG
terminal to the (grounding) terminal in the PLC requiring Class-D grounding.
-485-BD and FX -485ADP(-MB) have a built-in terminal resistor.
3G 3U
-485ADP, FX -485-BD and FX
2NC 2N
4.5 Connection Diagram for RS-485 and RS-422
FX -485-BD
3U
FX -485-BD
3G
FX -485-BD
2N
FX -485-BD
1N
FX -485ADP(-MB)
3U
SDA
SDB
RDA
RDB
SG
Class-D grounding Class-D grounding
(resistance: 100 Ω or less)
*1
-485-BD are supplied together with terminal resistors.
1N
FX -485-BD
3U
FX -485-BD
3G
FX -485-BD
2N
FX -485-BD
1N
FX -485ADP(-MB)
3U
SDA
SDB
RDA
RDB
SG
Class-D grounding Class-D grounding
(resistance: 100 Ω or less)
*1
-485-BD are supplied together with terminal resistors.
1N
4 Wiring
FX -485ADP
2NC
SDA
Terminal
SDB
resistor:
110 Ω
RDA
RDB
SG
*1
-485-BD, FX -485-BD,
2N 1N
FX -485ADP
2NC
SDA
SDB
RDA
RDB
Terminal
resistor:
330 Ω
× 2
SG
*1
-485-BD, FX -485-BD,
2N 1N
D-35
A
B
C
*3
D
E
F
G
*3
H
*3
I
Apx.