The inputs and outputs are not protected in any way, so
care must be taken when connecting anything to these
inputs and/or outputs.
All inputs and outputs are TTL level compatible.
•
output current 0.9 mA < Ion < 18 mA, Vce max 40 volt
•
Pmax 20 mW
2.3.3 Digital
I/O
The
Digital Input and Output
connectors give the user
the possibility to connect and control a number of devices.
For that purpose 6 output and 6 input lines are available.
These output and input lines are optically isolated from the
Inca.
Input 6 differs from the other inputs in a way that it has a
special purpose. Input 6 can also be used as an interrupt
input that is either level or edge sensitive.
Page 8
2005-12-12
Figure 2-6: Digital input and output connections
Table 2-1: LED control by Rhapsody software
LED 1
green or yellow
LED 2
green or yellow
LED 3
green or yellow
LED 4
green (only!)
DIGITAL I/O
PIN
INPUT
Input 4
Input 1
Input 2
Input 6
Input 3
Ground 6
Input 5
8
7
6
5
4
3
2
1
Common Ground 1..5
PIN
OUTPUT
Output 4
Common 24V 4..6
Output 6
Output 2
Output 5
Output 1
Common 24V 1..3
8
7
6
5
4
3
2
1
Output 3
Note
:
The common 24V lines of the outputs are clustered
in two groups of three outputs. Five input common grounds
are also clustered.
2.3.3.1 Digital
Inputs
LED 1
LED 2
The following diagram shows one input.
1
Common
Ground
Signal In
15V
940
Input
Output
1
LED 3
LED 4
Figure 2-7: Digital Input
