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2 Design
Multi-function Compact Inverter 3G3MX2-V1 User’s Manual (I585-E1)
2-3
W
irin
g
2
2-
3-4 Wiring for
Main C
irc
uit T
erminals
When driving a load with a large inertia or a vertical axis, regenerated energy is fed back to the inverter
when it is decelerating or generating downward movement.
If the amount of regenerative energy exceeds the amount allowable for the inverter, an overvoltage is
detected. Use braking resistors or regenerative braking units to prevent this.
z
Using built-in regenerative braking circuit
All models of the 3G3MX2-V1 Series Inverter have built-in regenerative braking circuit.
To improve the braking capacity, connect the optional external braking resistor to these terminals
(P/
+
2, RB).
Precautions for Safe Use
• Be sure to install a circuit that detects overheating of the braking resistor via alarm contacts
(thermal relay output terminals) and shuts off the input power supply of the inverter.
• Do not connect a resistor whose resistance is lower than the minimum connection resistance
value specified in the standard specifications table. Doing so may result in damage to the
regenerative braking circuit.
• When using the Braking Resistor (Model: 3G3AX-RBA/RBB/RBC) with a 400-V class
inverter, be sure to connect two braking resistors of the same model in series. Using the
Regenerative Braking Unit with only one braking resistor connected may cause damage to
the braking resistor.
• Wiring diagram
z
Using regenerative braking unit (Optional)
If a large braking torque is required and the built-in regenerative braking circuit cannot allow it, use
the Regenerative Braking Unit (optional).
In this case, connect the terminals (P/
+
2, N/
−
) of the regenerative braking unit to the inverter’s termi-
nals (P, N).
Precautions for Safe Use
• Be sure to install a circuit that detects overheating of the regenerative braking unit(s) and
braking resistor(s) via alarm contacts (thermal relay output terminals) and shuts off the input
power supply of the inverter.
• Do not connect a resistor whose resistance is lower than the connection resistance value
specified in the specifications table for that regenerative braking unit. Doing so may result in
damage to the regenerative braking unit.
• When using the Braking Resistor (Model: 3G3AX-RBA/RBB/RBC) with a 400-V class Regen-
erative Braking Unit (Model: 3G3AX-RBU41/RBU42/RBU43), be sure to connect two braking
resistors of the same model in series. Using the Regenerative Braking Unit with only one
braking resistor connected may cause burnout of the braking resistor.
External Braking Resistor Connection Terminal (P/+2, RB)/
Regenerative Braking Unit Connection Terminal (P/+2, N/–)
+
1
P/
+
2
RB
N/
−
Braking resistor
Summary of Contents for SYSDRIVE MX2 SERIES
Page 1: ...Multi function Compact Inverter MX2 Series Type V1 User s Manual I585 E1 01 3G3MX2 A V1 ...
Page 32: ...CONTENTS 29 Multi function Compact Inverter 3G3MX2 V1 User s Manual I585 E1 ...
Page 108: ...2 Design 2 48 Multi function Compact Inverter 3G3MX2 V1 User s Manual I585 E1 ...
Page 176: ...4 Parameter List 4 42 Multi function Compact Inverter 3G3MX2 V1 User s Manual I585 E1 ...
Page 538: ...10 Troubleshooting 10 22 Multi function Compact Inverter 3G3MX2 V1 User s Manual I585 E1 ...
Page 598: ...12 Options 12 50 Multi function Compact Inverter 3G3MX2 V1 User s Manual I585 E1 ...
Page 614: ...Appendices A 16 Multi function Compact Inverter 3G3MX2 V1 User s Manual I585 E1 ...
Page 615: ...I 1 Multi function Compact Inverter 3G3MX2 V1 User s Manual I585 E1 I Index ...