Mitsubishi Electric FR-E800-HVC Series Instruction Manual page 54

• When using an external power supply for transistor output
Sink logic
Use terminal PC as a common terminal, and perform wiring as
follows. (Do not connect terminal SD on the inverter with the
terminal of 0 V for the external power supply. When using
terminals PC and SD as a 24 VDC power supply, do not install
an external power supply in parallel with the inverter. Doing so
may cause a malfunction in the inverter due to undesirable
currents.)
QY40P type transistor
output unit
TB1
TB2
TB17
Constant
voltage
circuit
TB18
24 VDC SD
Inverter
STF
24 VDC
(SD)
STR
PC
Current flow
Source logic
Use terminal SD as a common terminal, and perform wiring as
follows. (Do not connect terminal PC on the inverter with the
terminal of +24 V for the external power supply. When using
terminals PC and SD as a 24 VDC power supply, do not install
an external power supply in parallel with the inverter. Doing so
may cause a malfunction in the inverter due to undesirable
currents.)
QY80 type transistor
output unit
TB1
TB2
Constant
voltage
TB17
Fuse
circuit
TB18
Current flow
Inverter
PC
STF
24 VDC
(SD)
STR
SD
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2. Installation and Wiring
2.6 Control circuit
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