Emerson Fisher 846 Configuration guide

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ATEX Hazardous Area Approvals
Fisher™846 Current‐to-Pressure Transducer
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 846 instruction manual (D102005X012),
available from your Emerson sales office, Local Business Partner, or at www.Fisher.com.
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,
and area re‐classification.
Specific Conditions of Use
Intrinsically Safe
The equipment must not be submitted to mechanical impacts or frictions.
The intrinsically safe apparatus shall only be connected to associated intrinsically safe apparatus certified for the
intended use. This association shall comply with the requirements of the standard EN 60079-25.
For barriers (linear and active) the association Uo and Io must be such that Po v1W, within the set limits
Uo : 40V, Io : 57mA, Po : 1W, Co : 24,5nF, Lo : 9,98mH or
Uo : 22V, Io : 200mA, Po : 1W, Co : 78,5nF, Lo : 0.39mH.
Instruction Manual Supplement
D104220X012
846 Transducer - ATEX
November 2017

Instruction Manual Supplement
D104220X012
846 Transducer - ATEX
November 2017
2
Flameproof
Certificate: Baseefa05ATEX0130X
1. The equipment incorporates flameproof joints which have a maximum gap less than that stated in EN 60079‐1. The
user shall refer to the manufacturer's installation, operation, and maintenance document for guidance.
2. The cable entry device used shall be certified Ex d IIB or Ex d IIC.
3. The user shall ensure that the maximum system pressure does not exceed 35 psi.
4. Refer to figures 2-2 and 2-3 in the instruction manual for proper bolting engagement length for ATEX flameproof
units.
5. A cable entry hole is provided for the accommodation of a flameproof cable entry device, with or without the
interposition of a flameproof thread adaptor.
The cable entry device and thread adapter shall be suitable for the equipment, the cable and the conditions of use
and shall be certified as Equipment (not a Component) under an EC Type Examination Certificate to Directive
2014/34/EU.
Type n
Ambient temperature range:
T5/T88_C: -40_C vTa v+85_C
T6/T77_C: -40_C vTa v+74_C
The equipment must only be connected to an external source with Umax: 40V or 22V, Imax: 200mA, Pmax: 0.8W as a
maximum supply parameters.
The apparatus must be connected according to instruction manual.
Refer to table 1 for additional approval information.
Table 1. ATEX Hazardous Area Classifications
Certificate Certification Obtained Entity Rating Temperature Code
ATEX
Intrinsically Safe
II 1 GD
Gas
Ex ia IIC T4,T5 Ga
Dust
Ex ia IIIC T90_C Da IP66 (Tamb ≤ 80_C)
Ex ia IIIC T50_C Da IP66 (Tamb ≤ 40_C)
Ui = 40 V OR
Ii = 57 mA
Pi = 1.0 W
Ci = 8 nF
Li = 20 mH
Ui = 22 V
Ii = 200 mA
Pi = 1.0 W
Ci = 8 nF
Li = 20 mH
T4 (Tamb ≤ 80_C)
T5 (Tamb ≤ 40_C)
Flameproof
II 2 G
Gas
Ex db IIB T5/T6 Gb
- - - T5 (Tamb ≤ 80_C)
T6 (Tamb ≤ 65_C)
Type n
II 3 GD
Gas
Ex nA IIC T5/T6 Gc
Dust
Ex tc IIIC T88_C T500 Dc IP66
Ex tc IIIC T77_C T500 Dc IP66
- - - T5 (Tamb ≤ 85_C)
T6 (Tamb ≤ 74_C)

Instruction Manual Supplement
D104220X012
846 Transducer - ATEX
November 2017
3
Figure 1. Loop Schematic (GE91565)
THE ENTITY CONCEPT ALLOWS INTERCONNECTION OF INTRINSICALLY SAFE APPARATUS TO ASSOCIATED APPARATUS NOT
SPECIFICALLY EXAMINED IN SUCH COMBINATION. THE CRITERIA FOR INTERCONNECTION IS THAT THE VOLTAGE (Vmax or Ui),
THE CURRENT (Imax or Ii), AND THE POWER (Pmax or Pi) OF THE INTRINSICALLY SAFE APPARATUS MUST BE EQUAL TO OR
GREATER THAN THE VOLTAGE (Voc or Uo), AND THE CURRENT (Isc or Io), AND THE POWER (Po) DEFINED BY THE ASSOCIATED
APPARATUS. IN ADDITION, THE SUM OF THE MAX UNPROTECTED CAPACITANCE (Ci) AND MAX UNPROTECTED INDUCTANCE (Li),
INCLUDING THE INTERCONNECTING CABLING CAPACITANCE (Ccable) AND CABLING INDUCTANCE (Lcable) MUST BE LESS THAN
THE ALLOWABLE CAPACITANCE (Co) AND INDUCTANCE (Lo) DEFINED BY THE ASSOCIATED APPARATUS. IF THE ABOVE CRITERIA
IS MET, THEN THE COMBINATION MAY BE CONNECTED.
INSTALLATION MUST BE IN ACCORDANCE WITH THE NATIONAL WIRING PRACTICES OF THE COUNTRY IN USE.
LOOPS MUST BE CONNECTED ACCORDING TO THE BARRIER MANUFACTURER'S INSTRUCTIONS.
THE INSTRINSICALLY SAFE APPARATUS SHALL ONLY BE CONNECTED TO ASSOCIATED INSTRINSICALLY SAFE
APPARATUS IN COMPLIANCE WITH STANDARD EN 60079-25.
WARNING: FOR INTRINSICALLY SAFE APPLICATIONS THE APPARATUS ENCLOSURE CONTAINS ALUMINUM AND IS
CONSIDERED TO CONSTITUTE A POTENTIAL RISK OF IGNITION BY IMPACT AND FRICTION. AVOID IMPACT AND FRICTION
DURING INSTALLATION AND USE TO PREVENT RISK OF IGNITION.
FOR BARRIERS (LINEAR AND ACTIVE) THE ASSOCIATION OF Uo AND Io MUST BE SUCH THAT Po  1W WITHIN THE SET
LIMITS OF THE 846 ENTITY PARAMETERS. REFER TO DIAGRAM ABOVE.
HAZARDOUS LOCATION NON‐HAZARDOUS LOCATION
ATEX
APPROVED
BARRIER
846
ZONE 0, Ex ia IIC
ZONE 20, Ex ia IIIC
846 ENTITY PARAMETERS
Ui = 22 VDC
Ii = 200 mA
Pi = 1.0 W
Ci = 8 nF
Li = 20 µH
Uo = 40 VDC
Ii = 57 mA
Pi = 1.0 W
Ci = 8 nF
Li = 20 µH
OR
846 BARRIER LIMITS
Uo ≤ 40 V | Uo ≤ 22 V
Io ≤ 57 mA | Io ≤ 200 mA
Co ≤ 24.5 nF | Co ≤ 78.5 nF
Lo≤ 9.98 mH | Lo≤ 0.39 mH
Emerson Automation Solutions
Marshalltown, Iowa 50158 USA
Sorocaba, 18087 Brazil
Cernay, 68700 France
Dubai, United Arab Emirates
Singapore 128461 Singapore
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