Mitsubishi Electric 800 Series Instruction Manual page 52

(The output signals may be used in either the sink or source logic independently of the switch setting.)
NOTE
• Never change the control logic while power is ON.
 Sink logic and source logic
• In the sink logic, a signal turns ON when a current exits 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 turns ON when a current enters 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
STF/
DI0
R
STR/
DI1
R
SD
Inverter
RUN
SE
Sink
connector
DC input (sink type)
<Example: QX40>
TB1
R
R
-
+ TB17
24 VDC
Current flow
For sink logic
SINK
SOURCE
Current flow concerning the input/output signal
when source logic is selected
Source logic
PC
Current
STF/
DI0
R
STR/
DI1
R
Inverter
RUN
+
SE
24 VDC
Current flow
Source
connector
DC input (source type)
<Example: QX80>
TB1
R
R
TB18
-
2. Installation and Wiring
2.6 Control circuit
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