Toshiba VF-NC3C Instruction Manual page 11

FOR REFERENCES ONLY
 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.
Setting of sink/source logic varies depending on the setup menu setting. (Refer to section 11.5)
2
Sink/source logic can be switched by parameter .
<Examples of connections when the inverter's internal power supply is used>
VFNC3C ENGLISH MANUAL
f 1 2 7 = 0
Sink (Negative) logic
24V
DC
Input
Output
F
Common
CC
24V
D
Output
Common P24
Input OUT
NO
CC
Programmable
Inverter
controller
B-10
NOT SUBJECTED FOR RESALE
f 1 2 7 = 1 0 0
Source (Positive) logic
24V
DC
Input
Common P24
Output
F
24V
DC
Output
P24
OUT
Input NO
CC
Common
Programmable
Inverter
controller
2