Use in potentially explosive atmospheres
CI/TTH200-EN
TTH200
EN - 9
2 Use in potentially explosive atmospheres
Special regulations must be observed in potentially explosive atmospheres 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 TTH200-E1H temperature transmitter in potentially explosive
atmospheres can be found in the section of the operating instructions titled "Ex relevant
specifications".
2.2
Housing degree of protection
The connection parts of the TTH200-E1H temperature transmitter and the HMI type AS LCD
display must be installed so that a housing degree of protection type of at least IP 20 as per
IEC 60529:1989 is achieved.
2.3
Electrostatic charging
When using the transmitter in Zone 0, please ensure that impermissible electrostatic charging of
the TTH200-E1H temperature transmitter and the LCD display is prevented (observe the
warnings on the device).
2.4
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.
2.5
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.
2.6
Configuration
The TTH200-E1H 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.
2.7
Ex relevant specifications
See chapter „Ex relevant specifications“ in the operating instructions.
