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165 Connecting to power supplyVEGACAL 62 • For connection to a signal conditioning instrument30317-EN-170503If 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 interfer-ence signals remains.Take note of the corresponding installation regulations for Ex applica-tions. In particular, make sure that no potential equalisation currentsflow over the cable screen. In case of grounding on both sides thiscan be achieved by the use of a capacitor or a separate potentialequalisation.5.2 Connection procedureProceed as follows:1. Unscrew the housing lid2. Loosen compression nut of the cable gland and remove blindplug3. Remove approx. 10 cm (4 in) of the cable mantle, strip approx.1 cm (0.4 in) of insulation from the ends of the individual wires4. Insert the cable into the sensor through the cable entry5. Lift the opening levers of the terminals with a screwdriver (seefollowing illustration)6. Insert the wire ends into the open terminals according to the wir-ing plan7. Press down the opening levers of the terminals, you will hear theterminal spring closing8. Check the hold of the wires in the terminals by lightly pulling onthem9. Connect the screen to the internal ground terminal, connect theexternal ground terminal to potential equalisation10. Tighten the compression nut of the cable entry gland. The sealring must completely encircle the cable11. Screw the housing lid back onThe electrical connection is finished.Connection cablefor Ex applications