Metrohm 818 IC Pump - Manual (Page 39)

5.2 Control interface
818 IC Pump / 8.818.1023 Instructions for Use
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5.2 Control interface
5.2.1 Functions
The 818 IC Pump has the following control inputs and outputs, which
are accessible via the control interface:
Inputs
Reduce flow rate via contact
Stop pump via contact
Outputs Contact open, when pump has been stopped
You will find detailed information on these functions in the following
section.
5.2.2 Control inputs and outputs
818 IC Pump external Function
Inputs
+ 5V
100k
4.7k
2
1
1n
Reduced flow rate (Reduced Flow)
with contact
Contact open: Flow rate 100%
Contact closed:
Flow rate 10%