ABB TTF300 Note De Mise En Exploitation page 63

4.5.7 Dust-explosion protection Zone 0/20
Housing design: ATEX II 1D IP 65 T135 °C
Transmitter design: ATEX II 1G EEx ia IIC T6
Explosion-protection zone 0
Fig. 16
A Sensor
B Transmitter TTF300
When using the sensor in zone 0, the transmitter must be in EEx ia (category 1G) design.
If the transmitter is designed with intrinsic safety, the power supply must provide an intrinsically
safe circuit.
CI/TTF300-X1
i
a
J
A
Explosion-protection zone 20
D
ia
B
C Power supply
D Interface for LC display
TTF300
Electrical connections
Safety area
ia
C
A00131
EN - 27