Position sensors and object recognition
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Fluid sensors and diagnostic systems Bus system AS-Interface Control systems Identification systems
 
MonitorAL-3: 2-channel analogue threshold relay for standard signals.
 
 

 
 With integrated comparator.

Functions
The monitor AL-3 is a programmable, 2-channel analogue threshold relay with two inputs for analogue standard signals 0/4...20 mA.

It picks up the current signals at separate inputs, compares them with the set limit values and switches the outputs according to the set switching functions. The input signals can be scaled suitably to the measuring range of the sensor or transmitter so that the measured values are indicated on the front display corresponding to their physical unit.

The AL-3 features an output relay with changeover contact and a transistor output per channel. The user can choose between the monitoring of values which exceed or fall below the limit values and window function.
In the “comparator” operating mode a differential pressure can for example be determined from the two input signals, monitored and provided as an analogue value.

 DL2003 - Monitor AL-3, 100...240 V AC/DC