Level monitoring relay
SIEMENS Low-Voltage Power Distribution
Overview
Level relays are used for the monitoring and control of conductive, non-combustible liquids and powders. They ensure overflow and dry run protection. Due to their sensor performance, the devices can also be used for general resistance monitoring.
LED displays:
- Green LED: lights up when operational voltage is applied
- Yellow LED: lights up if MIN output relay is activated
- Red LED: lights up if MAX output relay is activated.
Benefits
The measuring range up to 450 kΩ enables a differentiation between foam and liquid. It also increases the universal application for resistance measurements.
Due to its low-frequency, electrically isolated measuring circuit, the device has a high immunity to interference against system coupling, which enables cable lengths of up to 1500 m and suppresses the effects of electrolysis in the liquid.
* The two outputs for minimum and maximum control can also be used for the advance warning and tripping of limit values.
* 3 electrode connections for 1-step and 2-step level control
* All standard products can be used as electrodes
* High immunity to interference of the measuring circuit isolated from the system
* Programmable for open-circuit principle (with bridge X2 COM) or closed-circuit principle (without jumper)
* Separately adjustable delay times for tvmin and tvmax, 0.2to 2s
