3 Wiring
E-26
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.
• 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.
• 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.
WARNING
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.
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
Terminal Name
Specification
L1C and L2C
Control power supply
terminals
270 VDC to 324 VDC, -15% to +10%
B1/
+
Main circuit power
supply input termi-
nals for DC power
supply input
270 VDC to 324 VDC, -15% to +10%
2
0 VDC
L1, L2, L3,
B2, B3,
1,
and
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
terminal.
U, V, and W
Servomotor terminals
These are the
-7S connection terminals
for the Servomotor Main Circuit Cable
(power line).
Continued on next page.
