ABB TTF350 Operating Instructions Manual page 32

Electrical connection
5.5.2.8 Hermetically sealed zone 0
Housing design: ATEX II 2G EEx d IIC T6
Transmitter design: ATEX II 1G EEx ia IIC T6
Explosion-protection zone
Fig. 20
A Sensor
B TTF350 transmitter in Ex d housing
To achieve the "hermetically sealed" protection class, proper mounting of a specially certified
cable gland that complies with the standards and relevant Ex designation is required.
The input for the repeater power supply must be in EEx ia design.
The sensor must be used by the user in accordance with applicable ignition-protection
standards. It can be installed in zone 1 or zone 0. For zone 0, the circuit must be in "ia" design.
32
0
J
A
Explosion-protection zone 1
D
i
a
i
a
B
C Repeater power supply
D HMI interface for LCD display
TTF350
Safety area
i
a
C
A00133
OI/TTF350-EN