Purge Gas Controller Zone 2/22 - Exepd-Explosion protection

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Purge Gas Controller Zone 2/22

Accessories > Ex p - Systemes

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  Purge Gas Controller Type A42-M2

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Application:


The Ex pz Purge Gas Controller Type A42-M2 is designed to controll a pressurized cabinet with the maximum volume of 4000 liters, installed in zone 2 or zone 22.


The Purge Gas Controller is made of an aluminium enclosure which contains the electronic units as well as the Ex i control unit.
After connecting the controller to power, the pre-purge period starts automatically, which guarantees that no explosive gases are inside the cabinet anymore. After the pre-flushing time, the controller switch on the power to the cabinet. Internal pressure sensors monitors the differential pressure between the cabinet inside and the atmosphere outside.

Together with a purge valve and a pressure switch the purge controller ensures a constant overpressure in the cabinet.
If the pressure inside the cabinet drops under the lower limit, the controller gives an alarm signal or, depending on the conditions on site, turns off the power to the cabinet. The power could be turned off outside the hazardous area by an power relay or inside zone 2 or 22 by using the Exepd Power Relay Type A22-N1-V0102.
After the overpressure inside the cabinet is reached again, the controller starts automatically the pre-flushing process and switch on the power to the cabinet. The Exi control unit A42-I1 allows to make setting of purge times, pressure values, and function modifications. After the settings the Ex i control unit could be removed to protect the systems from unautorized changes or using with other A42-M2 controllers.

Advantages:

removeable Exi control unit
adjustable time delay
free adjustable additional contact
Ex i input for cooling systems
Input for bypass switch

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TypeDesign
Order number
Delivery
Price
A42-M2 40001324 V
400013

5 - 6 working days


A42-M2 400062230 V
400062
Image: Controller with Ex i control unit

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Dimensions / Technical Data

Enclosure material:

Aluminium grey RAL 7038

Ambient temperatur:

-20°C to +60°C

Protection:
IP 65

Measurement connections:

2 x R 1/8"

Power Connectors:
2 x M20 / 2 x M 16
Pressure range:
0 - 25 mbar
Weight:
1,7 kg

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Type of protection
II 3G Ex nA [ic] [pz] IIC T4 Gc
II 3D Ex t [ic] [pD] IIIC T135°C Dc

ATEX

Zone

0

1

2

20

21

22

usable in



x x

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Documentation
Data sheet

CE declaration


operating manual


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Recommended accessories / spare parts

ImageDesignation
Order numberPrice
Ex i control unit
400020


Ex pz Valve with Pressure regulator and manometer
24 VDC
205408

Ex pz Valve with Pressure regulator and manometert
230 VAC
205409

Power relay
Zone 2/22
400010

Ex pz Pressure Control Device
A42-P1
400011

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Last change: 26.09.2019
Copyright Exepd GmbH - 2015. All rights reserved.
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