ATEX II 2G/3G control unit, continuous purging Siemens

Обзор



BARTEC EEx p control unit "Continuous purging"

The APEX 2003.SI/A4 control unit controls and monitors the prepurging and operating phases of gas analyzers with containment systems in Ex zone 1 and Ex zone 2.

The control unit redundantly monitors the continuous flow of protective gas through the connected analyzer and thereby dilutes any escaping sample gas to below the lower explosive limit (max. purging gas pressure 25 hPa).

At the same time, a higher pressure is maintained inside the EEx-p enclosure than in the surrounding atmosphere. If the flow of purging gas or the internal pressure falls below a determined minimum value, the supply voltage to the equipment in the pressurized enclosure is shut down.

4 programmable relay inputs (8 relay contacts) are available to separate the data lines.

Чертеж



BARTEC control unit, dimensions in mm

Схема подключения



BARTEC control unit, continuous purging, gas connection diagram

BARTEC control unit, continuous purging, electric connection diagram

Технические данные



Control unit ATEX II 2G, continuous purging

 

Guidelines

EC EMC directive 89/336/EEC, EC low voltage, RL 73/23/EEC, Ex directive 94/9/EC

Design

Explosion-protected enclosure (EEx e) with viewing window in the cover

Degree of protection

IP65

Terminals

2.5 mm, finely stranded

Pressure sensors

MIN A = 0 … 25 hPa,
MIN B = 0 … 25 hPa,
MAX = 0 … 25 hPa,
MAX 1 = 0 … 25 hPa,
DIFF A = 0 … 25 hPa,
DIFF B = 0 … 25 hPa

Prepurging time

0 … 99 min; 5 sec dropout delayed

Weight

10 kg

Electrical data

 

Supply voltage

230 V AC (115 V AC) ± 10%, 48 … 62 Hz

Power consumption

21 W /230 V

NO contacts

K2/3; max. 250 V, 5 A with cos φ = 1,

K4/K5; supply voltage or floating, max. 250 V, 5 A with cos φ = 1

Communication

RS 485 interface

Temperature switching value (option)

0 … +40 °C

Explosion protection

 

Marking

EEx e d ib [ia p] IIC T4/T6

Test certification

DMT 99 ATEX E 082

Ambient temperature

-20 … +40 °C