Vega VEGAFLEX 82 Operating Instructions Manual

Also see for VEGAFLEX 82: Safety manual Supplementary instructions Quick setup guide Operating instructions Operating instructions

Vega VEGAFLEX 82 Operating Instructions Manual Manual pdf 19 page image

195 Connecting to power supplyVEGAFLEX 82 • 4 … 20 mA/HART - four-wire41830-EN-1710025 Connecting to power supply5.1 Preparing the connectionAlways keep in mind the following safety instructions:Warning:Connect only in the complete absence of line voltage.• The electrical connection must only be carried out by trainedpersonnel authorised by the plant operator.• If overvoltage surges are expected, overvoltage arresters shouldbe installed.Note:Install a separating facility for the instrument which is easy to access.The separating facility must be marked for the instrument (IEC/EN 61010).In this case, the instrument is designed in protection class I. To main-tain this protection class, it is absolutely necessary that the groundconductor be connected to the internal ground terminal. Take note ofthe national installation regulations.Supply voltage and current signal are carried on separate connectioncables if reliable separation is required. The supply voltage range candiffer depending on the instrument version.The data for power supply are specified in chapter "Technical data".In this case, the instrument is designed in protection class II. Gener-ally connect the instrument to vessel ground (potential equalization)or with plastic vessels to the next ground potential. For this purpose, aground terminal is located laterally on the instrument housing.An approved, three-wire installation cable with PE conductor isrequired for voltage supply with mains voltage.The 4 … 20 mA current output is connected with standard two-wirecable without screen. If electromagnetic interference is expectedwhich is above the test values of EN 61326-1 for industrial areas,screened cable should be used.Make sure that the cable used has the required temperature resist-ance and fire safety for max. occurring ambient temperatureUse a cable gland suitable for the cable diameter to ensure the sealeffect of the cable gland (IP protection).Metric threadsIn the case of instrument housings with metric thread, the cableglands are screwed in at the factory. They are sealed with plasticplugs as transport protection.You have to remove these plugs before electrical connection.Safety instructionsVoltage supply via mainsvoltageVoltage supply via lowvoltageConnection cableCable glands