Mitsubishi Electric FR-F720P-0.75K to 110K Instruction Manual page 46

(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 The contact between TH1 and TH2 is closed in the normal status and is open at a fault.
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
After making sure that the wiring is correct, set the following parameters:
⋅ Pr. 30 Regenerative function selection = "1"
⋅ Pr. 70 Special regenerative brake duty = "0 (initial value)"
Set Pr. 0 Brake mode selection = "2" in the brake unit FR-BU2.
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 The contact between TH1 and TH2 is open in the normal status and is closed at a fault.
*5 CN8 connector used with the MT-BU5 type brake unit is not used.
CAUTION
⋅ The stall prevention (overvoltage), oL, does not occur while Pr. 30 Regenerative function selection = "1" and Pr. 70 Special
regenerative brake duty = "0% (initial setting)."
♦ Parameters referred to ♦
Pr.30 Regenerative function selection
Pr.70 Special regenerative brake duty
MCCB MC
R/L1
S/L2
T/L3
Inverter
T
*2
MCCB MC
R/L1 U
V
S/L2
T/L3 W
P/+
N/-
Inverter
*5
Refer to page 125
Refer to page 125
Connection of stand-alone option units
ON
T
*2
MC
MC
FR-BR
Motor
U
P TH1
V M
PR
W
TH2
*3
FR-BU2
PR
P/+
P/+
*1
N/- N/-
BUE
SD
*3
10m or less
ON OFF CR1
Motor
M MC
MC
*3
10m
or less
*1
P
N P
P
*3
PR
BUE PR
SD
Brake unit Resistor unit
FR-BU2 MT-BR5
OFF
*4
A
B
C
CR1
TH1
TH2 *4
35
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