LSIS Master-K K200S - Page 6

Chapter 1 Instruction MASTER-K
1-4
Terms Definition Remark
Sink input
Current flows in from the input switch to the input terminal of
PLC when an input signal is turned on.
Z: Input
impedance
Source input
Current flows out from the input terminal of PLC to the input
switch when an input signal is turned on.
Sink output
Current flows in from the external load to the output terminal of
PLC when an output signal is turned on.
Source output
Current flows out from the output terminal of PLC to the
external load when an output signal is turned on.
Z
Common
+
Power
–
Switch
Current
PLC
Input
terminal
Z
Common
–
Power
+
Switch
Current
PLC
Input
terminal
Common
+
Power
–
Output
rela
y
Current
PLC
Output
terminal
Z
Common
–
Power
+
Output
rela
y
Current
PLC
Output
terminal
Z