Vega VEGAPULS 63 Operating Instructions Manual

Also see for VEGAPULS 61: Operating instructions Quick setup guide Operating instructions Operating instructions Operating instructions

Contents

Vega VEGAPULS 63 Operating Instructions Manual Manual pdf 30 page image

305 Connecting to power supplyVEGAPULS 63 • Two-wire 4 … 20 mA/HART36511-EN-1811275 Connecting to power supply5.1 Preparing the connectionAlways keep in mind the following safety instructions:• Carry out electrical connection by trained, qualified personnelauthorised by the plant operator• If overvoltage surges are expected, overvoltage arresters shouldbe installedWarning:Connect only in the complete absence of line voltage.Power supply and current signal are carried on the same two-wirecable. The operating voltage can differ depending on the instrumentversion.The data for power supply are specified in chapter "Technical data".Provide a reliable separation between the supply circuit and themains circuits according to DIN EN 61140 VDE 0140-1.Power the instrument via an energy-limited circuit acc. to IEC 61010-1, e.g. via Class 2 power supply unit.Keep in mind the following additional factors that influence the operat-ing voltage:• Lower output voltage of the power supply unit under nominal load(e.g. with a sensor current of 20.5 mA or 22 mA in case of fault)• Influence of additional instruments in the circuit (see load values inchapter "Technical data")The instrument is connected with standard two-wire cable withoutscreen. If electromagnetic interference is expected which is above thetest values of EN 61326-1 for industrial areas, screened cable shouldbe used.Make sure that the cable used has the required temperature resist-ance and fire safety for max. occurring ambient temperatureUse cable with round cross section for instruments with housing andcable gland. Use a cable gland suitable for the cable diameter toensure the seal effect of the cable gland (IP protection rating).We generally recommend the use of screened cable for HARTmultidrop mode.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.NPT threadIn the case of instrument housings with self-sealing NPT threads, it isnot possible to have the cable entries screwed in at the factory. TheSafety instructionsVoltage supplyConnection cableCable glands