Mitsubishi Electric FR-A820-00046 Instruction Manual page 80

Control circuit
Sink logic and source logic
● 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.
● 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.
Current flow concerning the input/output
signals when source logic is selected
Fig. 2-27:
2 - 50
Current
Inverter
DC input (source type)
<Example: QX80>
TB1
RUN
TB18
Current flow
Changing the control logic
Current flow concerning the input/output
signals when sink logic is selected
Current
Source
connector
Inverter
RUN
Current flow
Installation and wiring
Sink
connector
DC input (sink type)
<Example: QX40>
TB1
TB17
I001029E_G