OR8/R8
Page 3
1.4
Digital lines
1.4.1
OR8
As delivered, the OR8 is configured as follows:
•
port A (bit 0..7) = outputs (relays 1..8)
•
port B (bit 0..7) = inputs (optocouplers 1..8)
Pin assignment and direction of the digital lines at the D-Sub25
male connector of the OR8 can be defined by the user. This is
done by two ICs plugged on the corresponding sockets U10-U12
(for optocoupler inputs) and U14-U16 (for relay outputs).
That means that if connecting more than 8 digital lines, port C of a
USB-PIO can be used in this case for example.
A resistor array can be plugged on the input side (U10-U12) to pull
the them to low allowing for the inputs to have a defined state even
if no signal is applied (see table on page 4).
•
Of course, only use one socket each for the inputs and for the
outputs!
•
Please note, that the port direction set for the digital measuring
system must comply with the settings on the OR8, as
otherwise the board might be damaged.
The settings are specified in the following table and figure on the
right. The default setting is marked.
D-Sub25
IC on socket (Dig IN)
IC on socket (Dig OUT)
Pin
USB-PIO OR8
U10
U11
U12
U14
U15
U16
Array
1
14
2
15
3
16
4
17
A/0
A/1
A/2
A/3
A/4
A/5
A/6
A/7
channel 1
channel 2
channel 3
channel 4
channel 5
channel 6
channel 7
channel 8
IN1
IN2
IN3
IN4
IN5
IN6
IN7
IN8
OUT1
OUT2
OUT3
OUT4
OUT5
OUT6
OUT7
OUT8
U12
(pin 1-10)
5
18
6
19
7
20
8
21
B/0
B/1
B/2
B/3
B/4
B/5
B/6
B/7
channel 9
channel 10
channel 11
channel 12
channel 13
channel 14
channel 15
channel 16
IN1
IN2
IN3
IN4
IN5
IN6
IN7
IN8
OUT1
OUT2
OUT3
OUT4
OUT5
OUT6
OUT7
OUT8
U11
(pin 1-10)
9
22
10
23
11
24
12
25
C/0
C/1
C/2
C/3
C/4
C/5
C/6
C/7
channel 17
channel 18
channel 19
channel 20
channel 21
channel 22
channel 23
channel 24
IN1
IN2
IN3
IN4
IN5
IN6
IN7
IN8
OUT1
OUT2
OUT3
OUT4
OUT5
OUT6
OUT7
OUT8
U10
(pin 1-10)
13
GND
GND
