Changing The Control Logic - Mitsubishi Electric FR-D720S SC EC Instruction Manual

Wiring
3.4.4

Changing the control logic

FR-D700 SC frequency inverters offer the possibility of choosing between two types of control
logic. Depending on the direction of the flowing current, one distinguishes between:
● In 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 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
Fig. 3-17: Changing the control logic
The input signals are set to source logic (SOURCE) when shipped from the factory. To change
the control logic, the jumper connector above the control circuit terminal block must be moved
to the other position.
(The output signals may be used in either the sink or source logic independently of the jumper
connector position.)
FR-D700 SC EC
signals when sink logic is selected
Current
FR-D700 SC
RUN
Current
Current flow concerning the input/output
signals when source logic is selected
Current
SINK
+
–
DC input (sink type),
for example: AX40
Fig. 3-18:
Changing the control logic
Control circuit specifications
FR-D700 SC
DC input (source type),
for example: AX80
RUN
Current
+
SOURCE
I001029E
I001989E
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