3
BCN-C22005-969
Connection of stand-alone option units
When the brake unit (FR-BU2, FR-BU, BU), power regeneration common converter (FR-CV), power regeneration
converter (MT-RC), high power factor converter (FR-HC2), multifunction regeneration converter (FR-XC), or DC
power supply (under DC feeding mode) is connected, use terminal P/+ of the inverter. (Do not use terminal P3.)
The following diagram shows the connection example with the FR-BU2 (GRZG type discharging resistor).
U
V
W
P/+
N/-
R/L1
S/L2
T/L3
Motor
M
Inverter
PR
N/-
BUE
SD
P/+
A
B
C
FR-BU2
GRZG type
discharging
resistor
R
R
Three-phase AC
power supply
MCCB
MC
OFF
ON
MC
T
10 m or less
OCR
contact
MC
External thermal
relay
OCR
PR
PX
Connection example with the FR-BU2 (GRZG type discharging resistor)
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