ABB TTF200, Operating Instruction, Page: 12 / 36

12 TTF200 FIELD-MOUNT TEMPERATURE TRANSMITTER | OI/TTF200-EN REV. A
Flameproof enclosure - Zone 0 / 1
Housing design: ATEX II 2G Ex d IIC T6 Gb
Transmitter design: ATEX II 1G Ex ia IIC T6 Ga
Ex-area
Zone 0
Ex area Zone 1 Safe area
Fig. 8
A Sensor B Transmitter in Ex d-housing C Supply isolator
D Interface for LCD display
The “flameproof enclosure” type of protection is only
achieved by correctly installing a specially certified cable
gland with the Ex d type of protection with the
corresponding marking.
The input for the supply isolator must have an [Ex ia] design.
As the user, it is your responsibility to ensure that sensor
instrumentation meets the requirements of applicable Ex
standards.
The sensor can be installed in Zone 1 or Zone 0. For Zone 0,
the circuit must be of the [Ex ia] design.
The transmitter must be connected using suitable cable and
cable entries or pipeline systems that satisfy the
requirements of EN 60079-1 and for which a separate
examination certificate exists. If the transmitter is
connected to pipeline systems, the relevant sealing device
must be affixed directly to the housing.
Cable entries (PG glands) and sealing plugs of simple
structure type is prohibited.
Close unused cable entry in accordance with EN 60079-1.
The connection lead must be routed securely and in such a
way as to ensure adequate protection against damage.
If the temperature on the entry parts is over 70° C,
connection leads with sufficient temperature resistance
must be used.
The transmitter must be integrated into the local potential
equalization of the potentially explosive area.
2.5 Commissioning
The commissioning and parameterization of the device may
also be carried out in potentially explosive atmospheres
using a handheld terminal that has been approved
accordingly under consideration of an intrinsic safety
installation check.
Alternatively, an Ex modem can be connected to the circuit
outside the potentially explosive atmosphere.
2.6 Operating instructions
2.6.1 Protection against electrostatic discharges
The painted surface of the housing and the plastic parts
inside the device can store electrostatic charges.
WARNING
Risk of explosion!
The device must not be used in areas in which process-
related electrostatic charging of the housing may occur.
The device must be maintained and cleaned so that any
dangerous electrostatic charge is avoided.
A10126
ia ia
J
D
ia
A
C B