PISO-1730U Card
32-ch Optically Isolated DIO Board (Sink, NPN)
User Manual/ Ver. 1.2/ Jan. 2015/ PMH-0025-11/ Page: 10
2.4.2 Isolated D/O Architecture
Isolated D/O Architecture. (Current Sinking)
R=10K
D out
Vcc
390 R
O.C.
Out
D out (External)
(+) External Power
(-) GND External Power
D
PISO-1730U
R=6.8K
Typical Application of D/O. (Current Sinking)
R=6.8K
D out
Vcc
390 R
O.C.
Out
External
Device
External
Power
(+)
(-) GND
R1
I1
D1
PISO-1730U
DC
10V~30V
+
-
R=10K
Note!!
1.
The I1~I32 must be < 100 mA.
2.
The R1, R2, … R32 are current-limit resistors. They must be designed to let I1,
I2, …I32 < 100 mA.
3.
If the internal resistance of the external device is large enough, the R can be
omitted.
4.
D1, D2, … D31 are common-cathode diodes for switching inductive loads. They can
be used as relay drivers, hammer drivers, lamp drivers, display drivers, line drivers
& logic buffers.
