Connection Of Stand-Alone Option Units; Connection Of The Brake Unit (Fr-Bu) - Mitsubishi Electric F700 Instruction Manual

Connection of stand-alone option units

1.5 Connection of stand-alone option units

The inverter accepts a variety of stand-alone option units as required.
Incorrect connection will cause inverter damage or accident. Connect and operate the option unit carefully in
accordance with the corresponding option unit manual.
1.5.1

Connection of the brake unit (FR-BU)

When connecting the brake unit (FR-BU(H)) to improve the brake capability at deceleration, make connection as
shown below.
3-phase AC
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.
CAUTION
⋅ 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.
⋅ 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 inverterís input side to configure a circuit so that a current is shut off in case of fault.
18
MCCB
T
*2
MC
Motor
R/L1 U
S/L2 V IM
T/L3 W
Inverter
*1
N/−
ON
OFF
MC
FR-BR
TH1
P
PR
TH2
FR-BU
PR
HA
P
HB
N HC