Instruction Manual

© Sealevel Systems, Inc.
- 9 -
DIO-104.OPTO User Manual
Input Pin Assignments (P2)
Port A Bit P2 DB-37 Port B Bit P2 DB-37
36 18 20 29
0
35 37
0
19 10
34 17 18 28
1
33 36
1
17 9
32 16 16 27
2
31 35
2
15 8
30 15 14 26
3
29 34
3
13 7
28 14 12 25
4
27 33
4
11 6
26 13 10 24
5
25 32
5
9 5
24 12 8 23
6
23 31
6
7 4
22 11 6 22
7
21 30
7
5 3
4 21
3 2
Ground
2 20
+ 12 Volts 1 1
+ 5 Volts 37 19
Reading the Inputs
The inputs are active Low. If no voltage is applied across one of the differential
inputs it returns a one on that bit. If an AC or DC voltage (of sufficient magnitude,
covered above) is applied it returns a zero on that bit.
Function Available Port Address Hex
R A Base + 0
R B Base + 1
R = Read