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Connection of stand-alone option units
(2) FR-BR-(H) connection example with resistor unit
Three phase AC
power supply
*1
Connect the inverter terminals (P/+, N/-) and brake unit (FR-BU2) terminals so that their terminal names match with each other.
(Incorrect connection will damage the inverter and brake unit.)
*2
When the power supply is 400V class, install a step-down transformer.
*3
The wiring distance between the inverter, brake unit (FR-BU) and resistor unit (FR-BR) should be within 5m. Even when the
wiring is twisted, the cable length must not exceed 10m.
*4
Normal: across TH1-TH2...close, Alarm: across TH1-TH2...open
CAUTION
Do not remove a jumper across terminal P/+ and P1 except when connecting a DC reactor.
(3) Connection example with MT-BR5 type resistor unit
Three phase AC
power supply
*1
Connect the inverter terminals (P/+, N/-) and brake unit (FR-BU2) terminals so that their terminal names match with each other.
(Incorrect connection will damage the inverter and brake unit.)
*2
When the power supply is 400V class, install a step-down transformer.
*3
The wiring distance between the inverter, brake unit (FR-BU2) and resistor unit (MT-BR5) should be within 5m. If twisted wires
are used, the distance should be within 10m.
*4
Normal: across TH1-TH2...open, Alarm: across TH1-TH2...close
*5
CN8 connector used with the MT-BU5 type brake unit is not used.
CAUTION
Set "2" in Pr. 0 Brake mode selection of the FR-BU2 to use MT-BR5 type resistor unit.
32
MCCB
MC
R/L1
S/L2
T/L3
Inverter
T
MCCB
MC
R/L1
U
V
S/L2
T/L3
W
P/+
N/-
Inverter
*5
T
*2
MC
FR-BR
Motor
U
P
V
IM
PR
W
*3
FR-BU2
PR
P/+
P/+
*1
N/-
N/-
BUE
PC
*3
5m or less
*2
ON
OFF
CR1
Motor
IM
MC
*3
5m
or less
*1
P
N
P
*3
PR
BUE
PC
Brake unit
Resistor unit
FR-BU2
ON
OFF
MC
TH1
*4
TH2
A
B
C
MC
CR1
*4
TH1
P
PR
TH2
MT-BR5

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