Metrohm 874 - Page 48

7.1 Remote interface
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40
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874 Oven Sample Processor
Inputs
+5 V
approx. 50 kΩ Pull-up
t
p
t
p
> 20 ms
active = low, inactive = high
The input lines can be scanned with the SCAN command.
Outputs
Open Collector
t
p
t
p
> 200 ms
active = low, inactive = high
I
C
= 20 mA, V
CEO
= 40 V
+5 V: maximum load = 20 mA
The output lines can be set with the CTRL command.
Table 1
Inputs and outputs of the remote interface
Assignment Pin no. Assignment Pin no.
Input 0 21 Output 0 5
Input 1 9 Output 1 18
Input 2 22 Output 2 4
Input 3 10 Output 3 17
Input 4 23 Output 4 3
Input 5 11 Output 5 16
Input 6 24 Output 6 1
Input 7 12 Output 7 2
0 volts / GND 14 Output 8 6
+5 volt 15 Output 9 7
0 volts / GND 25 Output 10 8
Output 11 13
Output 12 19
Output 13 20