Dosing Pump Interface
Dosing pumps are often used as stand-alone units with little communication with the rest of the world. In the many cases where an integration into a system is required, as for most treatment plants, communication with a PLC and/or SCADA system is critical.
Often, the timing cycle of these external devices does not 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 co-ordinated 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.