Siemens SITRANS P220 Bedienungsanleitung Seite 10

5 Connecting
5.1 Basic safety instructions
WARNING
Unsuitable cables, cable glands and / plug-in connectors
Danger of explosion in hazardous areas.
Only use cable glands/plug-in connectors that fulfill the requirements of the relevant type of protection.
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Only use cables that have been designed for an ambient temperature of at least 20 K higher.
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Close cable openings for electrical connections that are unused.
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When replacing cable glands, only use ones of the same type.
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After installation check that the cables are seated firmly.
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WARNING
Improper power supply
Risk of explosion in hazardous areas as result of incorrect power supply, e.g. using direct current instead of alternating
current.
Connect the device in accordance with the specified power supply and signal circuits. The relevant specifications can
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be found in the certificates, in Technical specifications (Page 14) or on the nameplate.
WARNING
Unsafe extra-low voltage
Risk of explosion in hazardous areas due to voltage flashover.
Connect the device to an extra-low voltage with safe isolation (SELV).
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5.1.1 Grounding for Ex (explosion protection) devices
WARNING
Lack of equipotential bonding
Danger of explosion through compensating currents or ignition currents through lack of equipotential bonding.
Make sure that equipotential bonding exists for the device.
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The pressure transmitter must be connected to the equipotential bonding system of the plant via the metal housing
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(process connection) or the ground conductor of the plug.
Exception: It may be permissible to omit connection of the equipotential bonding for devices with type of protection
"Intrinsic safety Ex i".
WARNING
Unprotected cable ends
Risk of explosion through unprotected cable ends in hazardous areas.
Protect unused cable ends in accordance with IEC/EN 60079-14.
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SITRANS P220 (7MF1567)
A5E03304437-AA, 09/2017