Endress+Hauser Proline Promag 300 - Page 45

Proline Promag 300 HART Appendix
Endress+Hauser 45
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A0015443
 4 System components
1 Pump
2 Measuring device
3 Valve
4 Automation system
An analog signal (4–20 mA) proportional to the volume flow is generated in the transmitter.
This is sent to a downstream automation system where it is monitored to determine whether
it falls below or exceeds a specified limit value. The safety function (volume flow monitoring)
is implemented in this way.
For fault monitoring, the logic unit must recognize both HI alarms (≥ 21 mA) and LO alarms
(≤ 3.6 mA).