Toshiba VFNC3-2001P Instruction Manual page 44

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SINK (Negative) logic/SOURCE (Positive) logic (When the
inverter's internal power supply is used)
Current flowing out turns control input terminals on. These are called sink logic terminals.
The general used method in Europe is source logic in which current flowing into the input terminal turns it
on .
Sink logic is sometimes referred to as negative logic, and source logic is referred to as positive logic.
Each logic is supplied with electricity 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>
Programmable
controller
f127=0
Sink (Negative) logic
24V
DC
Input
Output
F
Common
CC
24V
D
Output
Common P24
Input OUT
NO
CC
Inverter
B-9
f127=100
Source (Positive) logic
24V
DC
Common P24
Output
F
24V
DC
P24
OUT
NO
Input
CC
Common
Programmable
Inverter
controller
E6581595
2
Input
Output