Metrohm 867 pH Module - Manual (Page 39)

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6 Appendix
867 pH Module
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Inputs
+5 V approx. 50 k Ω Pull-up
tp
t
p
> 20 ms
active = low, inactive = high
Outputs
Open Collector
tp
t
p
> 200 ms
active = low, inactive = high
I
C
= 20 mA, V
CEO
= 40 V
+5 V: maximum load = 20 mA
The following tables offer information concerning the assignment of the
individual pins and their function:
Table 1 Inputs and outputs of the remote interface
Assignment Pin No. Function *
Input 0 21 Start
Input 1 9 Stop
Input 2 22
Input 3 10 Quit
Input 4 23 –
Input 5 11
Input 6 24
Input 7 12
Output 0 5 Ready
Output 1 18 Conditioning OK
Output 2 4 Determination
Output 3 17 EOD
Output 4 3
Output 5 16 Error
Output 6 1
Output 7 2 Warning