PIO-D64/PIO-
D64U User’s Manual ( Ver.1.
6, Mar. 2015, PMH-007-16 ) ----- 22
2.8 Daughter Boards
2.8.1 DB-16P Isolated Input Board
The DB-16P is a 16-channel isolated digital input daughter board. The
optically isolated inputs of the DB-16P consist of a bi-directional photo-coupler
with a resistor for current limiting. You can use the DB-16P to sense DC signal
from TTL levels up to 24 V or use the DB-16P to sense a wide range of AC
signals. You can use this board to isolate the computer from large common-
mode voltage, ground loops and transient voltage spike that often occur in
industrial environments. The detail function block diagram is shown as Figure
2.10.
Figure 2.10
AC or DC Signal
0 V to 24 V
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