Mitsubishi Electric FR-A802-E Instruction Manual page 51

• 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
Inverter
• 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
Constant
voltage
circuit
50
2. INSTALLATION AND WIRING
2.6 Control circuit
STF
R
STR
R
SD
DC input (sink type)
<Example: QX40>
RUN
TB1
R
-
+ TB17
SE
24 VDC
Current flow
Inverter
TB1 STF
TB2 STR
TB17
PC
TB18
24 VDC SD
Current flow
Current flow concerning the input/output signal
when source logic is selected
Source logic
Sink
Current
connector
R
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
24 VDC
(SD)
Constant
voltage
PC
STF
R
STR
R
Inverter
DC input (source type)
<Example: QX80>
TB1
RUN
R
- TB18
+
SE
24 VDC
Current flow
PC
TB1
STF
TB2
STR
TB17
Fuse
circuit
TB18 SD
Current flow
Source
connector
R
Inverter
24 VDC
(SD)