Dosing Pump Interface

Dosing pumps are often used as stand-alone units with little outside communication. In the many cases where they are required to be integrated into a system, as it is with most treatment plants, establishing communication with a PLC and/or SCADA system is critical to proper operation.

It is common for the timing cycle of these external devices to not properly match the requirements of a pump. Osorno has developed a dosing pump interface with the following features:

• The rising flank of an incoming pulse of any length is converted into a 10 - 12 ms inverted or non-inverted pulse on the output, limited to a frequency of 2.5 Hz. This satisfies most diaphragm metering pumps on the market, and protects them from insufficiently coordinated trigger pulses.
• For verification of the execution of a trigger pulse, inductive rings are frequently used. Osorno's dosing pump interface converts these pulses into a 40 ms output pulse to assure that a connected PLC or SCADA system registers the activity.