Fisher Manuals & Guides: Fisher 646 Electro-Pneumatic Transducer-ATEX Approval Information Manuals & Guides

Instruction Manual Supplement

D104201X012

646 Transducer

May 2017

ATEX Hazardous Area Approvals

™

Fisher

Hazardous Area Classifications and Special Instructions for “Safe Use” and
Installation in Hazardous Locations

Certain nameplates may carry more than one approval, and each approval may have unique installation/wiring
requirements and/or conditions of “safe use”. These special instructions for “safe use” are in addition to, and may
override, the standard installation procedures. Special instructions are listed by approval.

Note

This information supplements the nameplate markings affixed to the product and the 646 instruction manual (D101351X012
available from your Emerson sales office or Local Business Partner, or at Fisher.com

Always refer to the nameplate itself to identify the appropriate certification.

646 Electro‐Pneumatic Transducer

),

.

WARNING

Failure to follow these conditions of “safe use” could result in personal injury or property damage from fire or explosion
and area re‐classification.

Standards Used for Certification

EN 60079-0: 2012 EN 60079-15: 2010 EN 61241-1: 2004

EN 60079-1: 2007 EN 60079-31: 2009 EN 61241-11: 2006

EN 60079-11: 2012 EN 61241-0: 2006

Special Conditions for Safe Use

Intrinsically Safe

This equipment is intrinsically safe and can be used in potentially explosive atmospheres.

The electrical parameters of certified equipment which can be connected to the device must not exceed the following
values: U

Ambient temperature: T5, at Tamb = 40_C ; T4, at Tamb = 71_C

≤ 30 VDC ; I0 ≤ 150 mA ; P0 ≤ 1 W

0

www.Fisher.com

646 Transducer

May 2017

Instruction Manual Supplement

D104201X012

Flameproof

The flame path is other than required by EN 60079‐1. Contact the manufacturer for information on the dimensions of
the flameproof joints.

Electrical connections are typically made using either cable or conduit.

D If using a cable connection, the cable entry device shall be certified in type of explosion protection flameproof

enclosure “d”, suitable for the conditions of use and correctly installed.

For ambient temperatures over 70_C, cables and cable glands suitable for at least 90_C shall be used.

D If using a rigid conduit connection, an Ex d certified sealing device such as a conduit seal with setting compound

shall be provided immediately to the entrance of the enclosure.

For ambient temperatures over 70_C, the wiring and setting compound in the conduit seal shall be suitable for at least
90_C.

Type n

No special conditions for safe use.

Refer to table 1 for additional information.

Table 1. Approval Information

Certificate Certification Obtained Entity Rating Temperature Code

II 1 G & D

Intrinsically Safe
Gas
Ex ia IIC T4/T5 Ga

Dust
Ex ia IIIC Da T155 °C (Tamb

Flameproof

ATEX

Neither Emerson, Emerson Automation Solutions, nor any of their affiliated entities assumes responsibility for the selection, use or maintenance
of any product. Responsibility for proper selection, use, and maintenance of any product remains solely with the purchaser and end user.

Fisher is a mark owned by one of the companies in the Emerson Automation Solutions business unit of Emerson Electric Co. Emerson Automation Solutions,
Emerson, and the Emerson logo are trademarks and service marks of Emerson Electric Co. All other marks are the property of their respective owners.

The contents of this publication are presented for informational purposes only, and while every effort has been made to ensure their accuracy, they are not
to be construed as warranties or guarantees, express or implied, regarding the products or services described herein or their use or applicability. All sales are
governed by our terms and conditions, which are available upon request. We reserve the right to modify or improve the designs or specifications of such
products at any time without notice.

Emerson Automation Solutions

Marshalltown, Iowa 50158 USA
Sorocaba, 18087 Brazil
Cernay, 68700 France
Dubai, United Arab Emirates
Singapore 128461 Singapore

www.Fisher.com

Gas
Ex d IIC T6 Gb

Dust
Ex tb IIIC T74 °C Db (Tamb ≤ 71°C)

Type n
Gas
Ex nA IIC T6 Gc

Dust
Ex tc IIIC T74 °C Dc (T

≤ 71°C) / T124°C (Tamb ≤ 40°C)

II 2 G & D

II 3 G & D

amb ≤ 71°C)

Ui = 30 VDC
Ii = 150 mA
Pi = 1.0 W
Ci = 0 nF
Li = 0 mH

T4 (Tamb ≤ 71°C)
T5 (Tamb ≤ 40°C)

- - -

T6 (Tamb ≤ 71°C)

- - -

- - -

T6 (Tamb ≤ 71°C)

- - -

- - -

2

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