ABB TTF300 Instrucciones Para La Puesta En Funcionamiento página 67

4.6.1.6 Dust explosion protection - Zone 0/20
Housing design: ATEX II 1D IP65 T135°C
Transmitter design: ATEX II 1G Ex ia IIC T6
Fig. 22
A Sensor
B Transmitter TTF300
If you are using the sensor in Zone 0 and the transmitter in Zone 20, the transmitter must
conform to category 1D and the circuit must be of the "ia" design.
If the transmitter is designed with intrinsic safety, the power supply must feature an intrinsically
safe circuit at all times.
4.6.1.7 Flameproof enclosure - Zone 1
Housing design: ATEX II 2G Ex d IIC T6
Transmitter design: No explosion protection
Fig. 23
A Sensor
B Transmitter in Ex d housing
C Supply isolator
The only way to achieve the "flameproof enclosure" type of protection is through the correct
installation of a specially certified cable gland with Ex d type of protection that is marked
accordingly.
CI/TTF300-X1
Ex area Zone 0
J
A
Ex area Zone 1
J
A
Ex area Zone 20
D
ia
i
a
B
C Supply isolator
D Interface for LCD indicator
E
B
D Fuse, < 32 mA
E Interface for LCD indicator
TTF300
Electrical connections
Safe area
ia
C
Safe area
D
C
A00131
A00132
EN - 29