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2 Design
High-function General-purpose Inverter RX2 Series User’s Manual
2-3 W
irin
g
2
2-
3-5 Wiring for
Contro
l Circuit
Ter
m
inals
Precautions for Correct Use
To separate the control circuit power supply (Ro, To) from the main circuit power supply (R, S,
T), observe the following instructions:
• For wiring between terminals Ro and To (terminal screw size: M4), use a cable of 1.25
mm
2
or heavier.
• Connect a 3 A fuse to the control circuit power supply cable.
• If the control circuit power supply (Ro, To) is turned on before the main circuit power supply
(R, S, T), ground fault detection at power-on is disabled.
• If you supply direct current power supply to the control circuit power supply (R0, T0), set
the output terminal NO/NC selection [CC-11] – [CC-17] to “00.” Otherwise when the direct
current is shut off, output signal may chatter.
• For the terminals Ro and To, the tightening torque should be as follows.
M4: 1.2 N·m (1.4 N·m max.)
The terminals L, COM and CM2 are insulated from each other via the input and output signal common
terminals. Do NOT short-circuit or ground terminals. Do NOT ground terminals via external equipment,
either. When finished wiring, check the external equipment ground conditions.
For wiring to the control circuit terminals, use twisted-pair shielded wires. Connect the shielded wire to
each common terminal.
Twist a cable connected to the terminal TH (thermistor input) with a cable of the terminal SC individu-
ally, and separate them from other SC common cables. Since the current flowing through the thermistor
is weak, separate the thermistor cable from main circuit wiring (power lines). The thermistor connection
cable should be 20 m or shorter.
Connect diodes to output terminals and relay output terminals for the countermeasure of reverse elec-
tric power.
The control circuit terminal block has two rows of terminals. Start wiring from the lower terminals. Wiring
from the upper terminals makes it difficult to wire the lower terminals.
Precautions for Correct Use
• Wiring the I/O signal lines for more than one inverter results in creating a sneak path in the
circuit. Connect a diode for sneak current prevention.
• The control circuit connection cables should be 20 m or shorter. Otherwise the inverter may
not perform specified characteristics due to voltage reduction or other reasons. When it is
inevitable to use a connecting wire shorter than 20 meters, apply analog insulating signal
converter and confirm it performs correctly.
• Separate the cables for control circuit terminal connection from the main circuit cable (power
lines) and the relay control circuit cable. If you cannot avoid crossing cables each other, try to
keep them at right angles to each other. Not doing so may result in the inverter malfunction.
Separate signal lines from power supply lines when wiring.
• Do not short-circuit the analog power supply terminals FS and FC and/or the interface power
supply terminals P24 and SC. Doing so may result in failure of the inverter.
• After wiring, pull the wire slightly to confirm that it is connected properly.
2-3-5
Wiring for Control Circuit Terminals
Wiring for Control Circuit Terminals
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: ......
