Mitsubishi Electric FR-A700 Technical Manual page 532

4.4.2 Inverters and motors are in pairs
MCCB
Power
supply
Related parameters
Terminal 2 frequency
setting gain frequency [Pr. 125]
[Ratio control operation]
Frequency setting
potentiometer
2W1k
Ratio setting
potentiometer
1/3W10k
The ratio setting potentiometer may be omitted by setting
the frequency setting gain/bias function of the inverter.
(common)
Ready
ON
OFF
M
C
MC
F
T
*3
MC
Frequency setting
potentiometer
2W1k
Multiple inverters may
be connected.
10
Inverter
2
No. 1
5
2
Inverter
5
No. 2
common
Inverter No. 1 Inverter No. 2
fault signal fault signal
B C B C
Inverter No. 1
R U
S V
T W
B
Fault signal
C
( 5V)
10 STF
2 SD
5
Ground
Inverter No. 2
R U
S V
T W
STF
SD
10 B
Fault signal
C
2
5
Ground
*4
*1 By using the frequency setting gain/bias function of the
inverter, you can make adjustment to match the output
frequencies of the three inverters corresponding to the
common voltage value from the frequency setting
potentiometer.
*2 When two or more motors are coupled mechanically,
larger load may be applied to one motor, resulting in
overload.
Use the method described on page 565.
*3 Provide a step-down transformer when the power supply
is 400V class.
*4 Multiple inverters of which total current is within the
permissible load current in terminal 10 (+5V) can be
connected.
Total of three inverters can be connected using terminal
10E (+10V) and a 1kΩ potentiometer.
566
PRACTICAL CIRCUITS
Motor
IM
closed when normal
opened when faulty
Start signal
Motor
IM