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(4) Sink logic and source logic
In the sink logic, a signal switches ON when a current flows from the corresponding signal input terminal.
Terminal SD is common to the contact input signals. Terminal SE is common to the open collector output signals.
In the source logic, a signal switches ON when a current flows 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
RES R
SOF
R
SD
Converter
Inverter
RES R
RDY
X10
SE
SD
Current flow
When using an external power supply for transistor output
Sink logic type
Use terminal PC as a common terminal, and perform
wiring as shown below. (Do not connect terminal SD of the
converter with the terminal 0V of the external power
supply. When using terminals PC and SD as a 24VDC
power supply, do not install an external power supply in
parallel with the converter. 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
DC24V SD
Sink
connector
Sink
connector
R
Converter
RES
DC24V
(SD)
SOF
PC
Current flow
Wiring of control circuit
Current flow concerning the input/output signal
when source logic is selected
Source logic
PC
Current
RES R
SOF
R
Converter
Inverter
PC
RDY
X10 R
SE
RES
Current flow
Source logic type
Use terminal SD as a common terminal, and perform
wiring as shown below. (Do not connect terminal PC of the
converter with the terminal +24V of the external power
supply. When using terminals PC and SD as a 24VDC
power supply, do not install an external power supply in
parallel with the converter. Doing so may cause a
malfunction in the inverter due to undesirable currents.)
QY80 type
transistor
output unit
TB1
TB2
Constant voltage
TB17
circuit
Fuse
TB18
Source
connector
Source
connector
R
Converter
PC
RES
DC24V
(SD)
SOF
SD
Current flow
2
61
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