Mitsubishi Electric FR-A700 Technical Manual page 530

4.3 Motor equipped with brake
MCCB
Power
supply
Ready
"OFF"
"ON"
PB1
PB2
MC
Stop
PB5
MC
*1 When stopping the motor equipped with electromagnetic brake, use the output stop terminal signal(MRS) of the inverter. A
failure to do so causes a lock current to flow in the motor when the brake is applied, and OCT may occur.
*2 The above caution must also be taken when using any other mechanical brake.
*3 When the motor equipped with a brake is run at or less than 30Hz continuously, the brake disc may rattle but the motor may be
used without any problem if it is run at low speed for a short period, for example. in orientation. Also, as there is a limit to the
braking capacity, run the motor at no more than 60Hz.
*4 In this circuit, pressing the stop button stops the motor with the electromagnetic brake. For operation of the electromagnetic
brake after the motor is decelerated by the inverter, refer to page 576.
*5 When the power supply is 400V class, install a step-down transformer.
*6 When using an external brake resistor or brake unit, remove the jumper from across PR-PX.
( 7.5K or less only. Not available for
A700
Do not use PR and PX terminals for the
MC
T *5
F
Brake
Resistor
unit
unit
FR-BR
FR-BU2
M
C
B C TH1 TH2
Forward
rotation
PB3 R
F
F
Reverse
rotation
F
PB4
R
R
*4
F
B
R
R
Hz
Frequency meter
Moving-coil type 1mA
F
R
Frequency setting
potentiometer
2W1k
E700
. Do not remove the jumper connected to terminal PR and PX.)
F700
common
(common)
BR
Inverter
R U
S V
T W
C Ground
B
P
N
When regenerative brake duty is large
(22K or less)
(0.4K to 15K)
P
PX
R
FM
PR
SD
Reset
STF RES
STR SD
*1 BR
10 MRS
2
5
.
D700
564
PRACTICAL CIRCUITS
*3
Brake
B
IM Motor
When FR-BU2 brake unit is used
PR PR
P
A
B
N
C
Resistor unit
Brake unit
FR-BR
FR-BU2
A700
D700
E700
External discharge resistor
for regenerative brake
PB6
P
TH1
TH2
THS