Mitsubishi Electric 800 Series Instruction Manual page 62

• In the source logic, a signal turns ON when a current enters into the corresponding signal input terminal.
Terminal PC is common to the contact input signals. Terminal SE is common to the open collector output signals.
Current flow concerning the input/output signal
when sink logic is selected
Sink logic
Current
STF/
DI0
R
STR/
DI1
R
SD
Inverter
RUN
SE
• 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-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
Sink
connector
DC input (sink type)
<Example: QX40>
TB1
R
R
-
+ TB17
24 VDC
Current flow
Inverter
STF/
DI0
24 VDC
(SD)
STR/
DI1
PC
Current flow
Current flow concerning the input/output signal
when source logic is selected
Source logic
PC
Current
STF/
DI0
R
STR/
DI1
R
Inverter
RUN
+
SE
24 VDC
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-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
Source
connector
DC input (source type)
<Example: QX80>
TB1
R
R
- TB18
Inverter
PC
STF/DI0
24 VDC
(SD)
STRDI1
SD
2. Installation and Wiring
2.6 Control circuit
1
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3
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9
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