Mitsubishi Electric FR-F740 EC Instruction Manual page 72

Connection of stand-alone option units
Example
As shown below, always use the start signal (ON or OFF across terminals STF or STR-PC)
to make a start or stop. (Refer to section 6.9.4.)
Fig. 3-25: Start and stop of the inverter
When the power supply is 400V class, install a step-down transformer.
Connect the power supply terminals R1/L11, S1/L21 of the control circuit to the primary side
of the MC to hold an alarm signal when the inverter's protective circuit is activated. At this
time, remove jumpers across terminals R/L1-R1/L11 and S/L2-S1/L21. (Refer to section
3.4.3.)
Handling of the inverter output side magnetic contactor
Switch the magnetic contactor between the inverter and motor only when both the inverter and
motor are at a stop. When the magnetic contactor is turned on while the inverter is operating,
overcurrent protection of the inverter and such will activate. When an MC is provided to switch
to a commercial power supply, for example, it is recommended to use commercial power supply-
inverter switch over operation Pr. 135 to Pr. 139.
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Power
supply
Operation preparation
OFF ON
Start-/Stop-
Operation
Stop
Inverter
To the
motor
Wiring
I001035E