Connecting
5
5.1
Basic safety notes
WARNING
Hazardous contact voltage
Risk of electric shock in case of incorrect connection.
● For the electrical connection specifications, refer to the information in Technical data
(Page 37).
● At the mounting location of the device observe the applicable directives and laws for
installation of electrical power installations with rated voltages below 1000 V.
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 data (Page 37) or on
the nameplate.
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.
WARNING
Improper laying of shielded cables
Risk of explosion through compensating currents between hazardous area and the
non‑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.
SITRANS I300 Isolating power supply with EIA-485 interface
Operating Instructions, 01/2019, A5E45099319-AA
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