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FISCO Field Device
Supply circuit for the connection to an intrinsically safe FISCO fieldbus-circuit:
Ui = 24Vdc, Ii = 380 mA, Pi = 5.32 W, Ci ≤ 5 nF, Li = neg
Parameters of the supply circuit comply with FISCO model according to Annex G EN 60079-11:2012, replacing EN 60079-27:
2008.
Input-signal-circuits:
three 0-20 mA or 4-20 mA signal inputs with common ground
Input impedance (load impedance) Ri 100
Effective internal capacitance Ci negligible
Effective internal inductance Li negligible
Safety relevant maximum values for certified intrinsically safe 0-20 mA or 4-20 mA signal circuits as a function of ambient
temperature and temperature class
Max. Ambient
temperature Ta
Temperature
Class
Voltage
DC Ui
Current Ii Power Pi
60ºC T4 28 V 93 mA 750 mW
50ºC T5 28 V 93 mA 750 mW
40ºC T6 28 V 93 mA 570 mW
The signal inputs are safely galvanically separated from the fieldbus circuit.
Ambient Temperature: -40ºC ≤ Ta ≤ +60ºC
The Essential Health and Safety Requirements are assured by compliance with:
EN 60079-0:2012 + A11:2013 General Requirements
EN 60079-11:2012 Intrinsic Safety “i”
CEPEL (Centro de Pesquisa de Energia Elétrica)
Intrinsic Safety (CEPEL 97.0020X)
Ex ia, Group IIC, Temperature Class T4/T5, EPL Ga
FISCO Field Device
Entity Parameters:
Pi = 5.32 W, Ui = 30V, Ii = 380mA, Ci = 5.0nF, Li = Neg
Ambient Temperature:
-20 to 65ºC T4
-20 to 50ºC T5
Explosion Proof (CEPEL 97.0090)
Ex d, Group IIC, Temperature Class T6, EPL Gb
Maximum Ambient Temperature: 40ºC (-20 to 40 ºC)
Environmental Protection (CEPEL 97.0020X AND CEPEL 97.0090)
Options: IP66/68W or IP66/68
Special conditions for safe use:
The certificate number ends with the letter "X" to indicate that for the version of Current to FIELDBUS Converter model IF302
equipped with housing made of aluminum alloy, only can be installed in "Zone 0" if is excluded the risk of occurs impact or friction
between the housing and iron/steel itens.
The Essential Health and Safety Requirements are assured by compliance with:
ABNT NBR IEC 60079-0:2008 General Requirements
ABNT NBR IEC 60079-1:2009 Flameproof Enclosures “d”
ABNT NBR IEC 60079-11:2009 Intrinsic Safety “i”
ABNT NBR IEC 60079-26:2008 Equipment with equipment protection level (EPL) Ga
IEC 60079-27:2008 Fieldbus intrinsically safe concept (FISCO)
ABNT NBR IEC 60529:2009 Classification of degrees of protection provided by enclosures (IP Code)
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