Connection Of The Brake Unit (Fr-Bu) - Mitsubishi Electric FR-V500 Instruction Manual

Model ..... FR-V520-11K to 15K, FR-V540-7.5K to 15K
1) Connect the brake resistor across terminals P and PR.
1.3.2

Connection of the brake unit (FR-BU)

Connect the optional FR-BU brake unit as shown below to improve the braking capability during deceleration.
Power
supply
*1 Connect the inverter terminals (P, N) and brake unit (FR-BU (H)) terminals so that their terminal signals match with each other.
(Incorrect connection will damage the inverter.)
*2 When the power supply is 400V class, install a step-down transformer.
*3 Be sure to remove a jumper across terminal PR-PX when using the FR-BU with the inverter of 5.5K or less.
*4 The wiring distance between the inverter, brake unit (FR-BU) and resistor unit (FR-BR) should be within 5m. If twisted wires
are used, the distance should be within 10m.
CAUTION
• If the transistors in the brake unit should become faulty, the resistor can be unusually hot, causing a
fire. Therefore, install a magnetic contactor on the inverter's input side to configure a circuit so that a
current is shut off in case of fault.
• Do not remove a jumper across terminal P and P1 except when connecting a DC reactor.
PR
R S T U V
Dedicated brake resistor
T *2
MC
R U
S V
T W
Inverter
*3
PR P
Remove
*1
jumper.
PX N
*4
Connection of stand-alone option units
R1 S1
Power supply terminal
block for control circuit
W N P1 P
(FR-ABR)
ON
Motor
IM
MC
PR
PR
P HA
HB
N
HC
Resistor unit
FR-BR
Brake unit
FR-BU
5
MC
OFF
P
TH1
THS TH2
1