Iecex - ABB 266 DDS Operating Instruction

Pressure transmitters

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2 6 6 D D S H A R T | P R E S S U R E T R A N S M I T T E R S | O I/ 2 6 6 D D S - E N R E V. A

. . .10 Hazardous Area considerations

. . .Hazardous atmospheres

IECEx transmitter with the following types of protection:

"flameproof enclosure Ex db" and "dust ignition protection by

enclosure Ex tb" in accordance with IEC standards

Transmitter with 4 to 20 mA output signal and HART communication

Certificate no.

IECEx FME 16.0002X

Marking

Ex db IIC T6 Ga/Gb Ta=–50 °C to +75 °C,

Ex tb IIIC T85 °C Db Ta = –50 °C to +75 °C;

IP66, IP67.

Permissible ambient temperature versus process temperature

Type of protection

Ex db IIC T6 Ga/Gb

Ex tb IIIC T85 °C Db

Power supply and signal circuit with "flameproof enclosure Ex db

and Ex tb" type of protection, with the following maximum values

Process

Max . ambient

temperature

≤ 121° C

75° C

≤ 121° C

75° C

U = 42 Vdc

P = 2 W

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