ABB HART TTF350 Commissioning Instructions page 55

4.5.5 Zone 2
Transmitter design: II 3G EEx nA II T6
Fig. 14
A Sensor
B TTF350 transmitter
Ensure that in case of a disturbance the supply voltage cannot exceed 40 % of the normal
voltage.
CI/TTF350-X1
Explosion-protection zone 2
J
A
D
B
C Power supply
D HMI interface for LCD display
TTF350
Electrical connection
Safety area
C
A00129
EN - 23