Metrohm 843 Pump Station with membrane pump - Manual (Page 29)

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7 Appendix
843 Pump Station with Membrane Pumps
￭￭￭￭￭￭￭￭ 21
Table 1 Functions and connections of the remote interfaces
Remote 1 Remote 2
Pin No. Function/Connection Pin No.
1 ——— 8
2 ——— 2
3 Pump 1 -
4 Pump 2 -
5 ——— 9
6 0 Volt (GND) 6
- -
8 ——— 1
9 ——— 5
Inputs (Pin 3 and 4)
+5 V approx. 5 k Ω Pull-up
tp
t
p
> 100 ms
active = low, inactive = high