ABB TTR200 Operating Instructions Manual page 21

5.5.4 Zone 1 (20)
Transmitter design: II 2G (1D) EEx [iaD] ib IIC T6
Zone 0, Zone 1,
Fig. 10
A Sensor
B Transmitter in housing with IP 20 level of
protection
For instruments in zone 1, the input for the repeater must be at minimum in [EEx ib] design.
The sensor must be used by the user in accordance with applicable ignition-protection
standards. It can be installed in zone 0, zone 1 or zone 20.
OI/TTR200-EN
Zone 20
J
A
Explosion-protection zone 1
ia
B
C Power supply [EEx ib]
TTR200
Electrical connection
Safety area
ib
ib
C
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