Toshiba VF-S11 - Manual (Page 18)

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Q SINK (Negative) logic/SOURCE (Positive) logic (When an external power supply
is used)
The PLC terminal is used to connect to an external power supply or to insulate a terminal from other input
or output terminals. As for input terminals, turn the SW1 slide switch to the PLC position.
＜ Examples of connections when an external power supply is used＞
Sink (Negative) logic
Inverter
PLC
F
Programmable
controller
Common
Output
Input
24V
DC
Output
F Output
Input
24V
DC
Output
OUT
NO
24V
DC
Input
Common
Inverter
Programmable
controller
Slide switch SW1:PLC Slide switch SW1:PLC
PLC Common
24V
DC
OUT Common
NO Input
Source (Positive) logic
Q Selecting the functions of the VIA and VIB terminals between analog input and
contact input
The functions of the VIA and VIB terminals can be selected between analog input and contact input by
changing parameter settings (H). (Factory default setting: Analog input)
When using these terminals as contact input terminals in a sink logic circuit, be sure to insert a resistor
between the P24 and VIA terminals or between the P24 and VIB terminals. (Recommended resistance:
4.7K
Ω-1/2W)
When using the VIA terminal as a contact input terminal, be sure to turn the VIA switch to the V position. If
no resistor is inserted or the VIA slide switch is not turned to the V position, contact input will be left always
ON, which is very dangerous.
Switch between analog input and contact input before connecting the terminals to the control circuit
terminals. Otherwise the inverter or devices connected to it may be damaged.