Instruction Manual Supplement
D104199X012
646 Transducer
May 2017
CSA 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.
Intrinsically Safe, Explosion proof, Type n Dust‐Ignition proof, DIV 2
No special conditions for safe use.
Refer to table 1 for additional information.
Table 1. Approval Information
Certification Body Certification Obtained Entity Rating Temperature Code
CSA
Intrinsically Safe
Ex ia IIC T4/T5 per drawing GE28591 (see figure 1)
Ex ia Intrinsically Safe
Class I, II, Division 1 GP A,B,C,D,E,F,G T4/T5
per drawing GE28591 (see figure 1)
Explosion-proof
Ex d IIC T6
Class I, Division I, GP A,B,C,D T6
Type n
Ex nA IIC T6
Class I, Division 2, GP A,B,C,D T6
Class II, Division 1, Groups E,F,G T6
Class II, Division 2, GP F,G T6
Vmax = 30 VDC
Imax = 150 mA
Pi = 1.0 W
Ci = 0 nF
Li = 0 mH
- - - T6 (Tamb ≤ 71°C)
- - - T6 (Tamb ≤ 71°C)
- - - T6 (Tamb ≤ 71°C)
T4 (Tamb ≤ 71°C)
T5 (Tamb ≤ 40°C)
www.Fisher.com
646 Transducer
May 2017
Figure 1. CSA Loop Schematic (Installation Drawing GE28591)
HAZARDOUS LOCATION NON-HAZARDOUS LOCATION
INTRINSIC SAFETY
CLASS I, II, III, DIV 1, GROUPS A,B,C,D,E,F,G
NON-INCENDIVE
CLASS I, DIV 2, GROUPS A,B,C,D
Instruction Manual Supplement
D104199X012
FISHER TYPE: 646
Vmax = 30 VDC
Imax = 150 mA
NOTES:
1. BARRIERS MUST BE CSA CERTIFIED WITH ENTITY PARAMETERS
AND ARE TO BE INSTALLED IN ACCORDANCE WITH THE
MANUFACTURER'S I.S. INSTALLATION INSTRUCTIONS.
2. EQUIPMENT SHALL BE INSTALLED IN ACCORDANCE WITH THE
CANADIAN ELECTRICAL CODE, PART I.
3. FOR ENTITY INSTALLATION (I.S. AND N.I.): Vmax > Voc, Imax > Isc,
Ci + Ccable < Ca, Li + Lcable < La.
GE28591
E1088
CSA APPROVED BARRIER
Ci = 0 nF
Li = 0 mH
Pi = 1.0W
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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,
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
2
E 2016, 2017 Fisher Controls International LLC. All rights reserved.
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