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3 Wiring
DC Power Supply Input
• Always specify a DC power supply input (Pn001 = n.1) before you
input DC power for the main circuit power supply.
If you input DC power without specifying a DC power supply input (i.e., with-
out setting Pn001 to n.1), the SERVOPACK's internal elements may
burn and may cause fire or damage to the equipment.
• With a DC power supply input, time is required to discharge electricity after
the main power supply is turned OFF. A high residual voltage may remain in
the SERVOPACK after the power supply is turned OFF. Be careful not to get
an electric shock. Refer to the following section for details.
10 Capacitor Discharge Time on page 66
• The Servomotor returns regenerative energy to the power supply. If you use a
SERVOPACK with a DC power supply input, regenerative energy is not pro-
cessed. Process the regenerative energy at the power supply.
• If you use a DC power supply input with any of the following SERVOPACKs,
externally connect an inrush current limiting circuit and use the power ON and
OFF sequences recommended by Yaskawa: SGD7S
-330A, -470A, -550A, -590A, or -780A.
There is a risk of equipment damage.
For information on the power ON and OFF sequences, refer to the product
manual for your SERVOPACK.
Terminal Sym-
bols
L1C and L2C
+
B1/
2
L1, L2, L3,
B2, B3,
1,
and
U, V, and W
E-26
Terminal Name
Control power supply
terminals
Main circuit power
supply input termi-
nals for DC power
supply input
Servomotor terminals
WARNING
270 VDC to 324 VDC, -15% to +10%
270 VDC to 324 VDC, -15% to +10%
0 VDC
None. (Do not connect anything to this
terminal.)
Note: 1. The SGD7S-470A to -780A do
not have a B3 terminal.
2. The SGD7S-330A to -780A do
not have a
These are the -7S connection terminals
for the Servomotor Main Circuit Cable
(power line).
Specification
terminal.
Continued on next page.
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