Siemens SITRANS TH Notice De Service page 12

WARNING
Improper laying of shielded cables
Danger of explosion through compensating currents between hazardous area and the non-hazardous area.
● Only ground shielded cables that run into the hazardous area at one end.
● If grounding is required at both ends, use an equipotential bonding conductor.
WARNING
Connecting device in energized state
Danger of explosion in hazardous areas.
● Connect devices in hazardous areas only in a de-energized state.
Exceptions:
● Circuits of limited energy may also be connected in the energized state in hazardous areas.
● Exceptions for type of protection "Non-sparking nA" (Zone 2) are regulated in the relevant certificate
WARNING
Incorrect selection of type of protection
Danger of explosion in areas subject to explosion hazard.
This device is approved for several types of protection.
1. Decide in favor of one type of protection.
2. Connect the device in accordance with the selected type of protection.
3. In order to avoid incorrect use at a later point, make the types of protection that are not used permanently
unrecognizable on the nameplate.
Note
Improvement of interference immunity
● Lay signal cables separate from cables with voltages > 60 V.
● Use cables with twisted wires.
● Keep device and cables in distance to strong electromagnetic fields.
● Use shielded cables to guarantee the full specification according to HART.
● Refer to HART communication information in Chapter "Technical data (Page 26)".
Note
Limited range of use
If the device has been operated outside the ambient conditions specified for potentially explosive atmospheres, you may no
longer operate the device in potentially explosive atmospheres. Make sure to permanently mask all Ex markings on the
nameplate.
WARNING
Risk of explosion when using unsuitable HART device
Only intrinsically safe HART modems or HART communicators are allowed to be operated in the intrinsically safe area or
on intrinsically safe circuits.
Note
Electrical data and T
amb
Electrical data and T are dependent on Ex-protection class, see Certificates
amb
(http://www.siemens.com/processinstrumentation/certificates)
12
SITRANS TH/TR/TF
A5E32363963-02, 09/2021