ABB TTF300 Note De Mise En Exploitation page 45

2 Use in potentially explosive atmospheres
Special regulations must be observed in potentially explosive areas for the power supply, signal
inputs/outputs and ground connection. The information relating specifically to explosion
protection that appears within the individual sections must be observed.
Notice - Potential damage to parts!
All parts must be installed in accordance with the manufacturer's specifications, as well as
relevant standards and regulations.
Commissioning and operation must comply with EN 60079-14 (Installation of equipment in
potentially explosive atmospheres).
2.1 Approvals
The approvals for use of the TTF300 temperature transmitter in potentially explosive
atmospheres can be found in the section of the operating instructions titled "Ex relevant
specifications".
2.2 Grounding
If, for functional reasons, the intrinsically safe circuit needs to be grounded by means of
connection to the equipotential bonding, it may only be grounded at one point.
2.3 Interconnection
If transmitters are operated in an intrinsically safe circuit, proof that the interconnection is
intrinsically safe must be provided in accordance with DIN VDE 0165/Part 1 (EN 60079-25/2004
and IEC 60079-25/2003). An interconnection certificate must always be provided for intrinsically
safe circuits.
2.4 Configuration
The TTF300 transmitter can be configured in the potentially explosive atmosphere in
compliance with the interconnection certificate, both directly in the potentially explosive
atmosphere using approved handheld HART terminals and by coupling an Ex modem into the
circuit outside the potentially explosive atmosphere.
2.5 Ex relevant specifications
See chapter 5, "Ex relevant specifications" page 30.
CI/TTF300-X1
Use in potentially explosive atmospheres
TTF300 EN - 9