Mitsubishi Electric FR-D720-070 Instruction Manual page 39

Control circuit specifications
(4) Signal inputs by contactless switches
The contacted input terminals of the inverter (STF, STR,
RH, RM, RL) can be controlled using a transistor +24V
instead of a contacted switch as shown on the right.
STF, etc.
Inverter
SD
External signal input using transistor
2
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