PIO-D48 Series Card
48-channel OPTO-22 Compatible DIO Board
User Manual/Ver. 3.4/Aug. 2015/PMH-006-34/Page: 51
V+
V-
AC or DC Signal
0 V to 24 V
Opto-Isolated
50-pin Cable
PIO-D48 Series Card
A4. DB-24P and DB-24PD Isolated Input Board
The DB-24P is a 24-channel isolated digital input
daughter board. The optically isolated inputs of
the DB-24P consist of a bi-directional optocoupler
with a resistor for current sensing. You can use the
DB-24P to sense DC signals from TTL levels up to
24 V or use the DB-24P to sense a wide range of
AC signals. You can also use this board to isolate the computer from large common-mode voltage, ground
loops and transient voltage spikes that often occur in industrial environments, as shown in Figure A4-1. Table
A4-1 is the comparison of DB-24P and DB-24PD.
Table A4-1:
DB-24P
DB-24PD
50-pin Flat-Cable Header
Yes
Yes
D-sub 37-pin Header
No
Yes
Other Specifications
Same
DB-24PD
DB-24P
Figure A4-1
PIO-D48 Series Card