Connecting
4
4.1 Basic safety notes
WARNING
Unsuitable cables, cable glands and/or plugs
Risk of explosion in hazardous areas.
● Use only cable glands/plugs that comply with the requirements for the relevant type of
protection.
● Tighten the cable glands in accordance with the torques specified in Technical
specifications (Page 65).
● Close unused cable inlets for the electrical connections.
● When replacing cable, glands use only cable glands 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 65) or on the nameplate.
NOTICE
Ambient temperature too high
Damage to cable sheath.
● At an ambient temperature ≥ 60 °C (140 °F), use heat-resistant cables suitable for an
ambient temperature at least 20 °C (36 °F) higher.
SITRANS TH320/TH420/TR320/TR420/TF320/TF420
Compact Operating Instructions, 03/2018, A5E41865021-AA 31
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