BARTEC Ex p control unit, "continuous purging"

The APEX 2003.SI control unit controls and monitors the prepurging and operating phases of gas analyzers with containment systems in hazardous zones 1 and 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 Ex-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 flameproof enclosure is shut down.

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