ABB TTF200 Operating Instruction page 11

TTF200 FIELD-MOUNT TEMPERATURE TRANSMITTER | OI/TTF200-EN REV. A
ATEX - Zone 1 (0)
Marking: II 2 (1) G Ex [ia] ib IIC T6 Gb (Ga)
Zone 0 Ex area Zone 1
or 1
D
ia
ia
J
A
B
Fig. 5
A Sensor B Transmitter TTF200 C Supply isolator [Ex ib]
D Interface for LCD display
The input for the supply isolator must have an [Ex ib]
design. As the user, it is your responsibility to ensure that
the sensor instrumentation meets the requirements of
applicable explosion protection standards. The sensor can
be installed in Zone 1 or Zone 0.
When using the transmitter in Zone 1, you must ensure that
impermissible electrostatic charging of the temperature
transmitter is prevented (observe the warnings on the
device).
ATEX - Zone 1 (20)
Marking: II 2 G (1D) Ex [iaD] ib IIC T6 Gb (Da)
Zone 20 Ex area Zone 1
or 21
D
ia
ia
J
A
B
Fig. 6
A Sensor B Transmitter TTF200 C Supply isolator [Ex ib]
D Interface for LCD display
The input for the supply isolator must have an [Ex ib]
design. As the user, it is your responsibility to ensure that
the sensor instrumentation meets the requirements of
applicable explosion protection standards. The sensor can
be installed in Zone 20 or Zone 21.
When using the transmitter in Zone 1, make sure that
impermissible electrostatic charging of the temperature
transmitter is avoided (observe the warnings on the device).
Flameproof enclosure - Zone 1
Housing design: ATEX II 2G Ex d IIC T6 Gb
Transmitter design: without explosion protection
Safe area
ib
C
A10127
Fig. 7
A Sensor B Transmitter in Ex d-housing C Supply isolator
D Fuse, 32 mA E Interface for LCD display
The power supply circuit of the transmitter must be limited
by an upstream fuse with a fuse current rating of 32 mA.
This is not required if the power supply unit is intrinsically
safe with an [Ex ia] design.
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 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
Safe area
structure type is prohibited.
Close unused openings 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.
ib
If the temperature on the entry parts is over 70° C,
ib
connection leads with sufficient temperature resistance
must be used.
The transmitter must be integrated into the local potential
C equalization of the potentially explosive area.
A10128
Ex area Zone 1
E
J
A
B
11
Safe area
D
C
A10130