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How to use the control circuit terminals
1.3.3 Changing the control logic
1) Sink logic type and source logic type
y 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.
y 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.
The input signals are set to sink
logic.
To change the control logic, the
jumper connector under the setting
dial must be moved to the other
position.
Change the jumper connector in
the sink logic position to source
logic position using tweezers, a pair
of long-nose pliers etc.
Change the jumper connector
position before switching power on.
CAUTION
•Make sure that the front cover is installed securely.
•The front cover is fitted with the capacity plate and the inverter unit with the
rating plate. Since these plates have the same serial numbers, always replace
the removed cover onto the original inverter.
•The sink-source logic change-over jumper connector must be fitted in only
one of those positions. If it is fitted in both positions at the same time, the
inverter may be damaged.
z Current flow concerning the input/output
signal when sink logic is selected
z Current flow concerning the input/output
signal when source logic is selected
Current
PC
STF
R
STR
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
R