ABB TTF300 Note De Mise En Exploitation page 61

4.5.4 Zone 1 (20)
Transmitter design: II 2 G (1D) EEx [iaD] ib IIC T6
Zone 0, Zone 1,
Fig. 13
A Sensor
B Transmitter TTF300
The input for the repeater power supply must be designed to "EEx ib" as a minimum.
The user must ensure that sensor instrumentation meets the requirements of applicable Ex
standards. It can be installed in Zone 0, Zone 1, or Zone 20. For Zone 0 and Zone 20, the circuit
must be designed to "ia".
4.5.5 Zone 2
Transmitter design: II 3G EEx nA II T6
Fig. 14
A Sensor
B Transmitter TTF300
In the event of a disturbance, it must be ensured that the supply voltage cannot exceed the
normal voltage by more than 40 %.
CI/TTF300-X1
Zone 20
ia
J
A
Ex Zone 2
J
A
Ex Zone 1
D
ia
B
C Power supply [EEx ib]
D Interface for LC display
D
B
C Supply isolator
D Interface for LC display
TTF300
Electrical connections
Safe area
ib
ib
C
A00128
Safe area
C
A00129
EN - 25