Mitsubishi FX3U-32DP, User Manual

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FX
3U
-32DP PROFIBUS-DP Interface Block
User’s Manual
4 Wiring
4.2 PROFIBUS-DP Wiring
4.2 PROFIBUS-DP Wiring
To connect the 32DP to a PROFIBUS-DP network, use the PROFIBUS connector and shielded twisted-pair
PROFIBUS cable complying with EN50170.
4.3 Grounding
Ground the cable as stated below.
• Use a grounding resistor of 100
Ω
or less.
• Ground the cables indepently for best results.
When independent grounding is not used, use "shared grounding" as follows.
• The grounding wire size should be AWG 14 (2 mm
2
) or larger.
• The grounding point should be as close to the PLC as possible, and all grounding wire should be as short
as possible.
4.4 Bus Terminator
To avoid signal reflections, connect a self-terminating DP-Connector/Device at each end of the PROFIBUS-
DP Network.
Note
The FX
3U
-32DP is not self-terminated.
Shielded twisted-pair
PROFIBUS cable
complying with EN50170
to PROFIBUS-DP network
Grounding plate
Grounding resistance of 100
Ω
or less (Class D)
For noise prevention, please attach
at least 50mm (1.97") of the
twisted-pair PROFIBUS cable
along the grounding plate to which
the ground terminal is connected.
Shielded twisted-pair
PROFIBUS cable to
PROFIBUS-DP
network
PROFIBUS connector
FX
3U
-32DP
PROFIBUS-DP Interface Block
FX
3U
-32DP
PROFIBUS-DP
Interface Block
FX
3G
/FX
3GC
/
FX
3U
/FX
3UC
/
FX5U/FX5UC PLC
PLC
Other
equipment
PLC
Other
equipment
PLC
Other
equipment
Shared grounding
Good condition
Common grounding
Not allowed
Independent grounding
Best condition