Toshiba VF-S15 Instruction Manual page 56

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.
Sink/source logic can be switched by slide switch SW1.
<Examples of connections when the inverter's internal power supply is used>
Slide switch SW1 : Sink side
Sink (Negative) logic
Output
Common
Common
Input
Programmable
controller
Slide switch SW1 : Source side
24V
DC
Input
F
CC
24V
DC
Output
P24
OUT
NO
CC
Inverter Programmable
controller
B-11
Source (Positive) logic
24V
DC
Common P24
Output F
24V
DC
Output
P24
OUT
Input
NO
CC
Common
Inverter
E6581611
2
Input