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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).
Three-phase AC
power supply
MCCB
MC
Connection example with the FR-BU2 (GRZG type discharging resistor)
T
MC
Motor
U
R/L1
External thermal
relay
S/L2
V
M
W
T/L3
Inverter
PR
P/+
PX
N/-
10 m or less
3
OCR
contact
ON
OFF
MC
GRZG type
discharging
OCR
resistor
R
R
FR-BU2
PR
A
P/+
B
N/-
C
BUE
SD
BCN-C22005-969
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