Operation
−37−
8.8 Sink logic/Source logic selection
With the basic function switch (SW1-No.3), the input circuit of the
driver can be switched between sink logic and source logic.
The output circuit of the driver can be switched between sink logic
and source logic by changing the wiring connection.
In the sink logic input circuit, a signal will be turned ON when the
current ows out of the input terminal.
In the source logic input circuit, a signal will be turned ON when the
current ows into the input terminal.
This switch is set to sink logic (OFF) at the time of shipment.
Set to sink logic or source logic based on the output circuit of the
external control device (programmable controller).
Basic function switch
SW1-No.3
ON: Source logic
OFF: Sink logic
Example of connection with I/O signal circuit
•
Sink logic circuit
15 VDC
100 mA or less→
100 mA or less→
0 V
0 V
0 V
1
2
3
4
9
10
5
3.3 kΩ
3.3 kΩ
3.3 kΩ
3.3 kΩ
3.3 kΩ
3.3 kΩ
15
R∗
R∗
14
8
7
Programmable controller Driver
BLV510, BLV620:
30 VDC or less, 100 mA or less
BLV640:
53 VDC or less, 100 mA or less
∗*
Be sure to suppress the current value to 100 mA or less. Connect a current-limiting resistor if the current exceeds this specied value.