Fisher IM Supplement: ATEX Hazardous Area Approvals-Fisher 3661 Positioners Manuals & Guides

Instruction Manual Supplement

D104230X012

ATEX Hazardous Area Approvals

3660 and 3661 Positioners

February 2017

Fisher

™

3661 Positioners

Hazardous Area Classifications and Special Instructions for “Safe
Use” and Installations 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 3660 and 3661 Positioners instruction
manual (D101402X012

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

WARNING

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

), available from your Emerson Automation Solutions sales office or at www.Fisher.com.

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

30 Vdc; I

value: U

Ambient Temperature:
T6, at Tamb = 47_C
T5, at Tamb = 62_C
T4, at Tamb = 82_C

Type n

The 3661 has an IP44 ingress protection: it is only intended to be installed in an area where a convenient protection is
ensured against the entry of solid foreign bodies and liquids which may decrease the safety.

www.Fisher.com

≤

0

150 mA; P

≤

0

1.25 W.

≤

0

3660 and 3661 Positioners

Instruction Manual Supplement

February 2017

Refer to table 1 for additional approval information.

Table 1. Approval Information

Certificate Certification Obtained Entity Rating Temperature Code

Ui = 30 VDC
Ii = 150 mA
Pi = 1.25 W
Ci = 0 nF
Li = 0 mH

T4 (Tamb ≤ 82°C)
T5 (Tamb ≤ 62°C)
T6 (Tamb ≤ 47°C)

- - - T6 (Tamb ≤ 62°C)

ATEX

II 1 G
Intrinsically Safe
Gas
Ex ia IIC T4/T5/T6 Ga

II 3 G
Type n
Gas
Ex nA IIC T6 Gc

D104230X012

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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,
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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

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2

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