LS ELECTRIC L7NHF Series, User Manual

Page: 32 / 409

2. Wiring and Connection
2-10

Power Supply Wiring Diagram (L7NHFA050U to L7NHFA075U)
U
V
W
L1
L2
L3
C1
C2
B+
B
BI
9
11
I/O
RA
M
E
Alarm-
Alarm+
1Ry
RA
1SK
1Ry 1MC
+24
V
NF
1MC
R S T
Servo drive
AC 200~230[V]
Main
OFF Main
ON
Encoder
External
regenerati
ve resistor
NOTE 1)
NOTE 2)
PO PI
DC reactor
N
NOTE 3)
Note 1) It takes approximately 1 to 2 seconds until an alarm signal is output after you turn on the main power.
Press and hold the main power ON switch for at least 2 seconds.
Note 2) 5 [kW] and 7.5 [kW] drives have built-
in regeneration brake resistors of (120 W, 6.8 Ω) and (240 W,
6.8 Ω), respectively. Check the connection of internal regeneration brake resistor to the B+ and B
terminals before using them. If the regenerative capacity is large due to frequent
acceleration/deceleration, connect the internal regeneration brake resistor wire to the internal resistor
fixing hole “NC” of the case and connect the external regeneration brake resistor to the B+ and B
terminals.
Note 3) Use N terminals to connect the external capacitor. The product may burn if a commercial power
supply is connected to N terminals.
Always contact the customer center or agency when it is necessary to connect the external capacitor.