9 - 3
9 Communications Functions
High-function General-purpose Inverter RX2 Series User’s Manual
9-
1 Co
m
m
unic
ation
Specif
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9
The RS485 communications function uses RS485 communication terminal block for terminals of the
control circuit.
Wire the RS485 communications terminal block as follows.
The wire size and tightening torque recommended for RS485 communication terminal block are as fol-
lows.
Connect the inverters parallel to each other as shown below. For termination, enable the terminating
resistor only for the terminal Inverter.
Use the terminating resistor even if you have only one Inverter connected.
Selecting a terminating resistor that matches the cable impedance improves the terminating effect.
For the 3G3RX2 Series Inverter, shorting the RP and RS terminals enables the built-in terminating
resistor (100
).
RS485 Port Specifications and Connections
Abbreviated
Terminal Name
Description
Function
SP
RS485 Sending/receiving
te side
At + side of Sending/receiving signal of RS485 communications
SN
RS485 Sending/receiving
terminal - side
At - side of Sending/receiving signal of RS485 communications
RP
Enable terminating resistor
terminal
A terminal which enables internal terminating resistor (100Ω).
The internal terminating resistor can be enabled when you con-
nect – side of RS485 communication sending/receiving terminal
(for connecting terminating resistor) to RP.
(SN)
RS485 Sending/receiving
terminal - side (for connect-
ing terminating resistors)
(CM1)
Signal ground
You can connect a signal ground of an external communication
device. (Also for FM terminal)
Screw
size
Tightening
torque [N·m]
Wire type
Wire size [mm
2
]
M2
0.22 to 0.25
Solid wire
0.14 to 1.5
(If two equal-sized wires are connected to one pole: 0.14 to
0.5)
Stranded wire
0.14 to 1.0
(If two equal-sized wires are connected to one pole: 0.14 to
0.2)
Stranded wire with
ferrule
0.25 to 0.5 (Example: PC-1.25F7 1.25=3AF from JST Mfg.
Co., Ltd.)
Connections
FM
CM1
RP
SN
SP
SN
SP
ED+
ED-
Digital output
RS485 communication
EDM output
Control circuit terminal area
Summary of Contents for RX - 2
Page 1: ...High function General purpose Inverter RX2 Series User s Manual I620 E1 01 3G3RX2...
Page 54: ...1 Overview 1 22 High function General purpose Inverter RX2 Series User s Manual...
Page 136: ...2 Design 2 82 High function General purpose Inverter RX2 Series User s Manual...
Page 592: ...8 Applied Settings 8 192 High function General purpose Inverter RX2 Series User s Manual...
Page 754: ...11 Options 11 56 High function General purpose Inverter RX2 Series User s Manual...
Page 794: ...12 Troubleshooting 12 40 High function General purpose Inverter RX2 Series User s Manual...
Page 919: ......
