Catalog excerpts
SENSORS FOR FOOD AND BIOPHARMA. Product information VNV-E, -D, -DU, -V, -S, -WEV, -WD, -WDV, ZNV-Z CONTROLS] Application / Specified Usage ■ Point level detection of aqueous, conductive media in tanks (minimum conductivity 1 pS/cm, depending on evaluation device) Application examples ■ Empty/full indication in tanks and pipes ■ Level control in tanks ■ Overfill protection in tanks ■ Dry running protection in pipes (e.g. before pumps) Special features ■ Measurement signal is absolutely free of DC voltage ■ Only one device for up to 4 point levels Application examples Level control in vessel with additional overfill protection (e.g. with VNV-WD) Medium flows into the vessel through the inlet. When the maximum level EO1 is reached, the pump is started and stops as soon as the medium level drops below the minimum level EU1. The overfill electrode EO2 prevents overflowing of the tank in the event of a malfunction. Simple level control in vessel (e.g. with VNV-E) Medium is continuously removed from the vessel at the outlet. When the medium level drops below the minimum level EU, medium is added at the inlet until the maximum level EO is reached. An after-run period can be set using the time setting.
Open the catalog to page 1Variants | Technical data Variant with 24 V DC active output, supply voltage 24 V DC Explanation as per VNV-WD * For the function, see the table on page 4: Setting the level detection switching function ** For the function, see the table on page 4: Functional principle of the level control
Open the catalog to page 2Variants | Technical data Variant with relay output, supply voltage 230 V AC (option:
Open the catalog to page 3Variants | Technical data Output is active or the relay is switched (LED is lit) Output is inactive or the relay is not switched (LED is not lit) Installation ■ If multiple device are installed next to each other (series), they must be separated by at least 5 mm. ■ Ensure that the terminals are secure before switching the device on. This is especially important for level switches with a relay output. 1. Configure the device as required for the device type on page 3. ■ Set the full/empty function ■ Set the time delay (switch-on/off) via the decode switches (only for VNV-D, VNV-DU and...
Open the catalog to page 4Views with open cover VNV-D | VNV-DU VNV-DO -* EZZI z vo11 /leer Ausg. 1 MEDt, n. c. »no m Abfall / Anzug Ausg. 1 -tail n.c. voli/ieer Ausg. 1 voll / leer Ausg. 2 Abfall / Anzug Ausg. 1 Abfall / Anzug Ausg. 2 Zeit E02 (nur vnv-du) Zeit EOI (nur vnv-du) voll / leer Ausg. 1 voll / leer Ausg. 2 n. c. n. c. Devices of type VNV-WD have no setting options. The sensitivity can be set on the front of the device.
Open the catalog to page 5Electrical connection VNV-E VNV-D | VNV-DH VNV-DO A1: zeitverzogert A2: direkt schaltend VNV-WD | VNV-WDV VNV-W
Open the catalog to page 6Electrical connection Attention In devices with a 230-V AC or 115-V AC supply voltage, the transformer must be protected on the primary side with a 1 AT (slow blow) fuse. This must be provided by the operator for each device. For devices with power supply 24 V DC: Ground wires of multiple devices may only be connected if the associated sensors are located in different tanks (or else the signals will be canceled)
Open the catalog to page 7Product information VNV-E, -D, -DU, -V, -S, -WEV, -WD, -WDV, ZNV-Z Order designation for variants with relay output (housing width 45 mm) VNV- yVNV- Function S (Sensitivity 0.1...100 kQ; 1 level control) SH (Sensitivity 0.1...1 MQ; 1 level control) SD (Sensitivity 0.1...50 kQ; 1 level control with wire break control) WEV (Sensitivity 0.1...100 kQ; 1 level control; with adjustable time delay) WEVH (Sensitivity 0,1...1 MQ; 1 level control; with adjustable time delay) WD (Sensitivity 0.1...100 kQ; 1 level control; 1 level detection) WDV (Sensitivity 0.1...100 kQ; 1...
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