Mitsubishi Electric FR-A700 Series, Техническое руководство

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558
PRACTICAL CIRCUITS
4.1 Standard connection diagram
(common)
The circuit diagram shown in this chapter are reference circuit diagrams used to activate functions.
When designing actual circuits, examine the operations of the machine and system and the rating, safety interlocks and other
devices such as the contactors, relays and other equipment.
4.1.1 The inverter equipped with magnetic contactor on primary side (FR-AX manual
controller used)
(common)
*1 This magnetic contactor is provided to prevent an automatic restart when power is restored after a power failure. Use the start
signal (ON or OFF of STF, STR) to make a start or stop.
*2 The inverter stops when both terminals STF and STR are closed simultaneously.
*3 When the power supply is 400V class, install a step-down transformer.
*4 When the motor shaft inertia is small, for example, this circuit may be omitted by utilizing the current limit function of the inverter.
common
common
IM
U
V
W
R
S
T
FM
SD
STF
STR
MCCB
F
"OFF"
PB2 T
T
MC
Hz
10
2
5
FM
VRN
SD2
SD1
STF
STR
MC
10
2
5
VRS
"FWD"
"REV"
"ON"
PB1
MC
B
C
Power
supply
*1
T*3
(Coasting interlock timer)
Ready
*4
FR-AX manual controller
"SPEED"
Frequency
meter
Calibration
resistor
Inverter
Motor
Ground
"SPEED SET"
Frequency setting
potentiometer