USB-OI16
Seite 5
3.4
Digital Channels
The digital lines are attached to the 37-pin D-Sub female
(see Figure 1, p. 4). Electrical isolation to the PC is
guaranteed by optocouplers on the USB-OI16.
The digital lines are addressed via two 16-bit ports A and B
by software. The 16 digital inputs (port A: I1..I16) and the 16
digital outputs (port B: O1..O16) are hard-wired at the D-
Sub 37.
•
Please carefully observe the polarity! Only apply voltages
within the adjusted range!
•
IOGND must never be connected to PC-GND (USB), as
this would override the galvanic isolation!
3.4.1
Digital Inputs
Up to 16 digital inputs are provided for digital sensors or other digital signal sources in the 3..32V
range at the connections I1..I16.
The following table and figure shows the pin assignment of the digital inputs at the 37-pin D-Sub
female and the related port assignment:
Digital IN
D-Sub37
Port/Bit
Digital IN
D-Sub37
Port / Bit
I1
11
A/0
I9
15
A/8
I2
30
A/1
I10
34
A/9
I3
12
A/2
I11
16
A/10
I4
31
A/3
I12
35
A/11
I5
13
A/4
I13
17
A/12
I6
32
A/5
I14
36
A/13
I7
14
A/6
I15
18
A/14
I8
33
A/7
I16
37
A/15
3.4.2
Digital Outputs
To control machines, switch a relay, etc. with 5V or 7..32V (see chapter 3.3), the 16 digital outputs
O1..O16 can be used.
counter :
Digital OUT
D-Sub37
Port/Bit
Digital OUT
D-Sub37
Port/Bit
O1
1
B/0
O9
5
B/8
O2
20
B/1
O10
24
B/9
O3
2
B/2
O11
6
B/10
O4
21
B/3
O12
25
B/11
O5
3
B/4
O13
7
B/12
O6
22
B/5
O14
26
B/13
O7
4
B/6
O15
8
B/14
O8
23
B/7
O16
27
B/15
