E6580938
−
10
−
4.3.1.
Connection of RS485 communication cable
Signal name
Name
RXA
Receiving data (+)
RXB
Receiving data (
−
)
TXA
Transmitting data (+)
TXB
Transmitting data (
−
)
SG
Signal ground
SHIELD
Shield
Upper and lower wire inlets
are connected inside.
■
Removable terminal block
Maker : Phoenix Contact
Type
: TMSTBP 2.5/6-ST-5.08
Claw side
RXA
RXB
TXA
TXB
SG
SHIELD
Refer to the following together with items described above as to cable connection to terminal block.
•
Do not connect the ground of shield to power ground such as that of the inverter.
•
Separate the communication cables at least 200mm from the main circuit cables.
Recommended
terminating
resistor
120
Ω
-1/2W
SW2-1
、
SW2-2=OFF
SW2-3
、
SW2-4=ON
(Terminating resistor setting)
Grade 3 ground (Ground resistance 100
Ω
)
Host computer
RS485
converter unit
TXA
TXB
RXA
RXB
SG
FG
RXA
RXB
TXA
TXB
SG
SHIELD
RXA
RXB
TXA
TXB
SG
SHIELD
RXA
RXB
TXA
TXB
SG
SHIELD
Shielded twist cable
■
Connection example for 2-wire system
Grade 3 ground (Ground resistance 100
Ω
)
Host computer
+
−
SG
FG
RXA
RXB
TXA
TXB
SG
SHIELD
RXA
RXB
TXA
TXB
SG
SHIELD
RXA
RXB
TXA
TXB
SG
SHIELD
Shielded twist cable
■
Connection example for 4-wire system
+: Transmitting and receiving data
(Positive)
−
: Transmitting and receiving data
(Negative)
SW2-1
〜
SW2-4=OFF
SW2-1
、
SW2-2=ON
SW2-3
、
SW2-4=OFF
SW2-1
、
SW2-2=ON
Either SW2-3 or SW2-4
should be set to ON.
In this example,
SW2-3 = OFF, SW2-4 = ON
(Terminating resistor setting)
SW2-1
、
SW2-2=ON
SW2-3
、
SW2-4=OFF
* Terminal numbers of host computer differ with models.
Read the instruction manual of host computer before wiring.
SW2‑4=ON
SW2‑3=ON
SW2‑4=ON
RS485
converter unit
RS485
converter unit
RS485
converter unit
RS485
converter unit
RS485
converter unit
Recommended
terminating
resistor
120
Ω
-1/2W
SW2-1
〜
SW2-4=OFF
Summary of Contents for RS4002Z-0
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