Connection Of Rs485 Communication Cable - Toshiba RS4002Z-0 Instruction Manual

Connection of RS485 communication cable

4.3.1.
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.
■
Removable terminal block
Claw side
RXA
Maker : Phoenix Contact
Type : TMSTBP 2.5/6-ST-5.08
■ Connection example for 4-wire system
Host computer
Recommended
TXA
terminating
resistor
TXB
120 Ω -1/2W
RXA
RXB
SG
FG
Grade 3 ground (Ground resistance 100 Ω )
■ Connection example for 2-wire system
+: Transmitting and receiving data
− : Transmitting and receiving data
Host computer
＋
−
Recommended
terminating
SG
resistor
120 Ω -1/2W
FG
Grade 3 ground (Ground resistance 100 Ω )
* Terminal numbers of host computer differ with models.
Read the instruction manual of host computer before wiring.
Upper and lower wire inlets
are connected inside.
SHIELD
SG
TXB
TXA
RXB
Shielded twist cable
RS485
converter unit
RXA
RXB
TXA
TXB
SG
SHIELD
SW2-1 ∼ SW2-4=OFF
Shielded twist cable
(Positive)
RS485
converter unit
(Negative)
RXA
RXB
TXA
TXB
SG
SHIELD
SW2-1 、 SW2-2=ON
SW2-3 、 SW2-4=OFF
Signal name
RXA
RXB
TXA
TXB
SG
SHIELD
RS485
converter unit
RXA
RXB
TXA
TXB
SG
SHIELD
SW2-1 ∼ SW2-4=OFF
RS485
converter unit
RXA
RXB
TXA
TXB
SG
SHIELD
SW2-1 、 SW2-2=ON
SW2-3 、 SW2-4=OFF
−10−
E6580938
Name
Receiving data (+)
Receiving data ( − )
Transmitting data (+)
Transmitting data ( − )
Signal ground
Shield
RS485
converter unit
RXA
SW2-3=ON
RXB
TXA
SW2-4=ON
TXB
SG
SHIELD
SW2-1 、 SW2-2=OFF
SW2-3 、 SW2-4=ON
(Terminating resistor setting)
RS485
converter unit
RXA
RXB
TXA
SW2-4=ON
TXB
SG
SHIELD
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)