Welding System User Manual

E6581301
B-14
2
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■ Sink logic/source logic (When inverter's internal power supply is used)
Current flowing out turns control input terminals on. These are called sink logic terminals.
The method generally used in Europe is source logic in which current flowing into the input terminal turns it on.
Sink logic terminals and source logic terminals are sometimes referred to as negative logic terminals and positive
logic terminals, respectively.
Each logic is supplied with power from either the inverter's internal power supply or an external power supply, and its
connections vary depending on the power supply used.
<Examples of connections when the inverter's internal power supply is used>
Source logic
Sink logic
CC
OUT1
P24/PLC
F
!
Common
!
Common
!
Output
!
Input
!
Input
24V
DC
!
Output
F
CC
Common
!
Output
!
Input
24V
DC
!
Output
NO
24V
DC
!
CC
NO
OUT1
P24/PLC
24V
DC
!
Input
Common
!
Inverter
Programmable
controller
!
Inverter
Programmable
controller
!
P24/PLC
F
R
ST
CC
OUT1
OUT2
NO
CC
RY
RY
Inverter
P24/PLC
F
R
ST
CC
OUT1
OUT2
NO
RY
RY
Inverter
SW1
!
INT
!
SW1
!
INT/P
LC
!
SINK
!
SOURCE
!
P24/PLC
*1
*1:Be sure to short across NO-CC