Mitsubishi Electronics FR-A701 Manuel D’Utilisation

4)Sink logic and source logic

⋅ 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.

• 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 inverter with terminal 0V of the external power
supply. When using terminals PC and SD as a 24VDC
power supply, do not install a power supply in parallel in
the outside of the inverter. Doing so may cause a
malfunction due to undesirable currents.)

⋅ Source logic type

Use terminal SD as a common terminal, and perform
wiring as shown below. (Do not connect terminal PC of
the inverter with 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 inverter. Doing so may cause a
malfunction in the inverter due to undesirable currents.)

Current

PC

STF

R

STR

R

Source logic

Source
connector

Current

SD

STF

R

STR

R

Sink
connector

Sink logic

DC input (source type)
<Example: QX80>

24VDC

RUN

SE

TB1

TB18

R

Inverter

R

Current flow

+

-

+

-

DC input (sink type)
<Example: QX40>

Inverter

24VDC

RUN

SE

TB1

TB17

R

R

Current flow

QY40P type transistor  

output unit

TB1

TB2

TB17

TB18

24VDC SD

PC

STR

STF

Inverter

24VDC
(SD)

Current flow

Constant  

voltage  

circuit

QY80 type transistor  

output unit

Constant  

voltage  

circuit

PC

TB1

TB2

TB17

Fuse

TB18

STF

STR

SD

Inverter

24VDC
(SD)

24VDC

Current flow