ABB TTR200 - Page 21

Electrical connection
OI/TTR200-EN TTR200 21
5.5.4 Zone 1 (20)
Transmitter design: II 2G (1D) EEx [iaD] ib IIC T6
Zone 0, Zone 1,
Zone 20
Explosion-protection zone 1 Safety area
ib
BC
ib
A00210
ia
J
A
Fig. 10
A Sensor
B Transmitter in housing with IP 20 level of
protection
C Power supply [EEx ib]
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.