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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.
LED 1
Output
LED 3
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!)
Page 8
LED 2
1
Input
1
LED 4
DIGITAL I/O
PIN INPUT
1
Input 1
2
Input 2
3
Input 3
Input 4
4
5
Input 5
6
Common Ground 1..5
7
Input 6
8
Ground 6
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
The following diagram shows one input.
Figure 2-7: Digital Input
PIN
OUTPUT
1
Common 24V 4..6
2
Output 6
3
Output 5
4
Output 4
5
Common 24V 1..3
6
Output 3
7
Output 2
8
Output 1
Signal In
940
15V
Common
Ground
2005-12-12
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