Installation In Ignition Protection Areas; Zone 1 (0); Zone 1 (20) - ABB TTH300 Instructions Manual

4.3.2

Installation in ignition protection areas

Transmitters can be installed in a wide variety of industrial sectors. Systems that require ignition
protection are divided into zones. As a result, different instruments are also required. For
additional information, refer to the section "Explosion-protection relevant information" or the data
sheet.
4.3.2.1 Zone 0
Transmitter design: II 1G EEx ia IIC T6
Fig. 12
A Sensor
B Transmitter in housing with IP20 level of
protection
For instruments in zone 0, the transmitter must be installed in its own housing with IP20 level of
protection. The input for the power supply must be in [EEx ia] design.
When using the transmitter in zone 0, make sure you prevent electrostatic charging of the
temperature transmitter (observe warnings on equipment).
The sensor must be used by the user in accordance with applicable ignition-protection
standards.
CI/TTH300-EN
Zone 0 Explosion-protection zone 0
J
A
D
i
a
ia
B
C Power supply [EEx ia]
D HMI interface for LCD displays (activation
is possible as an option only when
ordering)
TTH300
Electrical connection
Safety area
ia
C
A00145
EN - 17