Dynamic SFC332L, Operator'S Manual

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Dynamic Flow Computers SFC332L Manual Quick Start
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Date: 8/1/2019
Turbine input wiring for passive (dry contact) pulse generators
Some mass flow meters have pulse outputs that do not provide power but instead require
external power, they are referred to as passive outputs, dry outputs, open collector, etc. (For
example the Krohne UFM 3030 Mass meter).
In these cases the wiring should be as shown on the below diagram. The pull up resistor can be
adjusted to limit the current sink by the Mass meter. For Turbine Input 1 JP3 must be ON and
R11 OFF and if using Turbine Input 2 then JP2 must be ON and R3 OFF.