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Sigma II User's Manual
3.3.1
Names and Descriptions of Main Circuit Terminals
The following table gives the names and a description of main circuit terminals.
Terminal
Name
Symbol
L1, L2 or L1,
Main circuit AC
L2, L3
input terminal
Servomotor con-
U, V, W
nection terminal
Control power
L1C, L2C
input terminal
Ground terminal
B1, B2
External regen-
or
erative resistor
terminal
B1, B2, B3
DC reactor ter-
minal connec-
tion for power
⊕1, ⊕2
supply har-
monic wave
countermeasure
Main circuit
Negative termi-
nal
Main circuit Pos-
itive terminal
Main Circuit Names and Description
30 to 200W
Single-phase 100 to 115V
30 to 400W
Single-phase 200 to 230V
0.5 to 3.0kW
Three-phase 200 to 230V
Connects to the Servomotor.
30 to 200W
Single-phase 100 to 115V
30 to 3.0kW
Single-phase 200 to 230V
Connects to the power supply ground terminals and motor ground terminal.
Normally not connected.
Connect an external regenerative resistor (provided by cus-
30 to 400W
tomer) between B1 and B2 if the regenerative capacity is
insufficient.
Note: No B3 terminal.
Normally short B2 and B3 (for an internal regenerative resis-
tor).
Remove the wire between B2 and B3 and connect an external
0.5 to 3.0kW
regenerative resistor (provided by customer) between B1 and
B2 if the capacity of the internal regenerative resistor is insuf-
ficient.
Normally short ⊕1 and ⊕2.
If a countermeasure against power supply harmonic waves is needed, con-
nect a DC reactor between ⊕1 and ⊕2.
Normally not connected.
Normally not connected.
3-8
Description
+10%, -15%
(50/60Hz)
+10%, -15%
(50/60Hz)
+10%, -15%
(50/60Hz
+10%, -15%
(50/60Hz)
+10%, -15%
(50/60Hz)
Chapter 3: Wiring
)
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