Connecting
5
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.
● Only use cables that have been designed for an ambient temperature of at least 20 K
higher.
● Close cable openings for electrical connections that are unused.
● When replacing cable glands, only use ones of the same type.
● After installation check that the cables are seated firmly.
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 be found in the certificates, in Technical specifications
(Page 27) or on the nameplate.
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.
● The pressure transmitter must be connected to the equipotential bonding system of the
plant via the metal housing (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".
SITRANS P220
Compact Operating Instructions, 02/2019, A5E03304437-AB
17
