ABB TTH200 Operating Instruction page 8

8 TTH200 HEAD-MOUNT TEMPERATURE TRANSMITTER | OI/TTH200-EN REV. B
... 2 Use in potentially explosive atmospheres in accordance with
ATEX and IECEx
... Installation instructions
ATEX - Zone 0
Designation: II 1 G Ex ia IIC T6 Ga
Ex-area Zone 0
A Sensor
B Transmitter in housing with IP
rating IP 20
Figure 2: Hookup in ATEX - Zone 0
When using the transmitter in Zone 0, it must be installed in a
suitable housing with IP -rating IP 20.
The input for the supply isolator must be designed with 'Ex ia'
type of protection.
When using the transmitter in Zone 0, make sure that
impermissible electrostatic charging of the transmitter is
avoided (observe the warnings on the device).
As the user, it is your responsibility to ensure that the sensor
instrumentation meets the requirements of applicable explosion
protection standards.
Note
When operating the transmitter in Zone 0 (EPL 'Ga'), the
compatibility of the device materials with the surrounding
atmosphere must be guaranteed.
Encapsulation material used for the transmitter:
Polyurethane (PUR), WEVO PU-417
Safe area
C Supply isolator [Ex ia]
D Interface for LCD indicator
ATEX - Zone 1 (0)
Marking: II 2 (1) G Ex [ia IIC Ga] ib IIC T6 Gb
Zone 0 or 1 Ex-area Zone 1
A Sensor
B Transmitter in housing with
IP-rating IP 20
Figure 3: Hookup in ATEX - Zone 1 (0)
When using the transmitter in Zone 1, it must be installed in a
suited housing with IP rating IP 20.
The input of the supply isolator must be designed with 'Ex ib'
type of protection.
As the user, it is your responsibility to ensure that the sensor
instrumentation meets the requirements of applicable explosion
protection standards. The sensor can be installed in Zone 1 or
Zone 0.
When using the transmitter in Zone 1, make sure that
impermissible electrostatic charging of the temperature
transmitter is avoided (observe the warnings on the device).
Safe area
C Supply isolator [Ex ib]
D Interface for LCD indicator