WARNINGLack of equipotential bondingDanger of explosion through compensating currents or ignition currents through lack ofequipotential bonding.For devices of intrinsic safety "db", "ec", "tb" or "tc" which are operated in a non-intrinsically safecircuit, observe the following:• Connect the device to the system via the equipotential bonding terminal.Note: For devices of the intrinsic safety "ia", "ib" and "ic" type of protection, which are operatedin an intrinsically safe circuit, connection to the system via the equipotential bonding terminalis not required.WARNINGImproper laying of shielded cablesRisk of explosion through compensating currents between hazardous area and thenon‑hazardous area.• Shielded cables that cross into hazardous areas should be grounded only at one end.• If grounding is required at both ends, use an equipotential bonding conductor.WARNINGConnecting or disconnecting device in energized stateRisk of explosion in hazardous areas.• Connect or disconnect devices in hazardous areas only in a de-energized state.Exceptions:• Devices having the type of protection "Intrinsic safety Ex i" may also be connected inenergized state in hazardous areas.WARNINGIncorrect selection of type of protectionRisk of explosion in hazardous areas.This device is approved for various types of protection.1. Select an intrinsic safety type of protection "ia", "ib", "ic" or non-intrinsic safety "db", "tb", "tc","ec".2. Connect the device according to the selected type of protection.3. When operating with non-intrinsically safe power supplies, make the intrinsically safe typesof protection permanently unrecognizable as in the nameplate example.Connecting5.1 Basic safety instructionsSITRANS P320/P42038 Compact Operating Instructions, 09/2021, A5E38874562-AD