Operating Instructions - VEGADIS 62 -

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5 Connecting to power supply5 Connecting to power supply5.1 Preparing the connectionSafety instructionsAlways keep in mind the following safety instructions:l Connect only in the complete absence of line voltagel If overvoltages are expected, install overvoltage arrestersVoltage supplyPower supply and current signal are carried on the same two-wirecable. The voltage supply range can differ depending on the sensor.The data for power supply are specified in chapter "Technical data".Provide a reliable separation between the supply circuit and the mainscircuits according to DIN VDE 0106 part 101.Keep in mind the following additional influences on the operatingvoltage:l Output voltage of the power supply unit can be lower undernominal load (with a sensor current of 20.5 mA or 22 mA in case offault message)l Influence of additional instruments in the circuit (see load values inchapter "Technical data")Operation of VEGADIS 62 in a HART multidrop system with the signalconditioning instruments VEGAMET 625 or VEGASCAN 693 is notsupported.Connection cableThe instrument is connected with standard two-wire cable withoutscreen. If electromagnetic interference is expected which is above thetest values of EN 61326 for industrial areas, screened cable should beused.Use cable with round cross-section. A cable outer diameter of 5 … 9 mm(0.2 … 0.35 in) ensures the seal effect of the cable gland. If you areusing cable with a different diameter or cross-section, exchange theseal or use a suitable cable gland.We generally recommend the use of screened cable for HARTmultidrop mode.Cable gland ½ NPTWith plastic housing, the NPT cable gland or the Conduit steel tubemust be screwed without grease into the threaded insert.Max. torque for all housings see chapter "Technical data"12 VEGADIS 6236469-EN-100514
5 Connecting to power supplyCable screening andgroundingIf screened cable is necessary, connect the cable screen on both endsto ground potential. In the sensor, the screen must be connecteddirectly to the internal ground terminal. The ground terminal on theoutside of the housing must be connected to the potential equalisation(low impedance).If potential equalisation currents are expected, the connection on theprocessing side must be made via a ceramic capacitor (e. g. 1 nF,1500 V). The low frequency potential equalisation currents are thussuppressed, but the protective effect against high frequency interferencesignals remains.Warning:Within galvanic plants as well as vessels with cathodic corrosionprotection there are considerable potential differences. Considerablyequalisation currents can be caused via the cable scrren when thescreen is earthed on both ends. To avoid this, the cable screen mustonly connected to ground potential on one side of the switchingcabinet in such applications. The cable screen must not be connectedto the internal ground terminal in the sensor and the outer groundterminal on the housing not to the potential equalisation!Information:The metal parts of the instrument (antenna, transmitter, concentrictube, etc.) are conductive connected with the inner and outer groundterminal on the housing. This connection exists either directly metallicor with instruments with external electronics via the screen of thespecial connection cable. You can find specifications to the potentialconnections within the instrument in chapter "Technical data".5.2 Connection technology and stepsConnection technologyConnection procedureThe connection of the signal cable is carried out via spring-loadedterminals in the housing.The indicating and adjustment module is connected via a cable withcoupling to the housing.Proceed as follows:1 Unscrew the housing cover36469-EN-100514VEGADIS 62 13
Page 1: Operating InstructionsVEGADIS 62Doc
Page 5 and 6: 2 For your safety2 For your safety2
Page 7 and 8: 3 Product description3 Product desc
Page 9 and 10: 3 Product descriptionHART multidrop
Page 11: 4 MountingTube mountingVEGADIS 62 f
Page 15 and 16: 5 Connecting to power supply5 Inser
Page 17 and 18: 5 Connecting to power supplyConnect
Page 19 and 20: 5 Connecting to power supplyConnect
Page 21 and 22: 6 Set upStart parameter adjustmentE
Page 23 and 24: 6 Set upl Temperature: °C, °F, Kl
Page 25 and 26: 6 Set upMeasurement/AddressAdjustme
Page 27 and 28: 6 Set upIndication/Min. alarmAdjust
Page 29 and 30: 6 Set upConfiguration/ResetIn a res
Page 31 and 32: 6 Set upConfiguration/FirmwareThe n
Page 33 and 34: 7 Diagnosis and serviceChecking the
Page 35 and 36: 8 Dismounting8 Dismounting8.1 Dismo
Page 37 and 38: 9 SupplementAdjustment elements4 ke
Page 39 and 40: 9 Supplement9.3 DimensionsVEGADIS 6
Page 41 and 42: 9 Supplement9.4 Industrial property
Page 43 and 44: Index36469-EN-100514VEGADIS 62 43

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