Connection Of Stand-Alone Option Units - Mitsubishi Electric FR-F500 Series Instruction Manual

2.2.5 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 ) Connection of the FR-BU brake unit (option)
Connect the optional FR-BU brake unit as shown below to improve the braking capability during deceleration.
Note: 1. Connect the inverter terminals (P, N) 〈+, −〉 and FR-BU brake unit terminals so that their terminal
signals match with each other. (Incorrect connection will damage the inverter.)
2. The wiring distance between the inverter, brake unit and resistor unit should be within 5m
(16.40feet). If twisted wires are used, the distance should be within 10m (32.81feet).
3. When the transistor in the brake unit fails, the brake transistor becomes extremely hot and it has
a chance to get fire. Therefore, install a magnetic contactor on the inverter's power supply side to
shut off a current in case of failure.
4. For the power supply of 400V class, install a voltage-reducing transformer.
T (Note 4)
MC
R 〈L 〉
Motor
U
1
S 〈L 〉
V
2
T 〈L 〉
W
3
Inverter
〈+〉 P
〈–〉 N
INSTALLATION AND WIRING
ON
IM
MC
PR
PR
HA
P/+
HB
N/-
HC
Resistor unit
FR-BR-(H)
Brake unit
FR-BU-(H)
25
MC
OFF
P
TH1
THS TH2