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Chapter 6: Cautions regarding Explosion-Proof Models
[7. NEPSI intrinsically safe]
Select an installation location for a NEPSI intrinsically safe model in accordance with the
following criteria.
• Hazardous areas in which this device can be installed are defined as follows.
[Zone 0, 1, or 2 hazardous area]
Ex ia IIC T6, T5 or T4 Ga
Dustproof and waterproof performance specifications: IP66
Ambient temperature range: T4: −40 to +80°C, T5: −40 to +60°C, T6: −40 to +40°C
Caution
•
The “X” after the explosion-proof certification number indicates that there are special
safety-related usage conditions. If the positioner is used with equipment protection
level (EPL) “Ga,” take necessary measures to protect the case from any friction or
shocks that could cause ignition.
• Use the NEPSI intrinsic safety model device with a barrier that satisfies the specifica-
tions below.
For models those date of manufacture are before September 2017
Input signal circuit:
Model AVP300/301/302 Ui = 30V, Ii = 95mA, Pi = 0.66W, Ci = 0, Li = 0.2mH
Travel transmission circuit:
Model AVP301 Ui = 30V, Ii = 95mA, Pi = 0.66W, Ci = 0, Li = 0.2mH
For models those date of manufacture are aer October 2017
Input signal circuit:
Model AVP300/301 Ui = 30V, Ii = 100mA, Pi = 1W, Ci = 5nF, Li = 0.22mH
Model AVP302 Ui = 30V, Ii = 100mA, Pi = 1W, Ci = 41nF, Li = 0.22mH
Travel transmission circuit:
Model AVP301 Ui = 30V, Ii = 100mA, Pi = 1W, Ci = 22nF, Li = 0.22mH
• Make sure that the specifications of related equipment that is connected to this prod-
uct follow the conditions below.
Uo_Ui, Io_Ii, Po_Pi, Co_Cc+Ci, Lo_Lc+Li
Uo, Io, and Po: maximum voltage, current, and power of related equipment
Co and Lo: maximum capacitance and impedance allowed in related equipment
Cc and Lc: impedance and inductance of cables
•
During installation, use pulling equipment that satisfies the IP20 (GB4208) specifications.
• For the cables to be connected to this product and safety-related apparatus, use
shielded cables covered with an insulating sheath, and ground the shielding.
• Users are not permitted to change any components inside.
• When using the device, give sufficient consideration to preventing corrosion, defor-
mation, damage, etc. with respect to the products case, cover, and the like.
Protection levels, classified based on the possibility that the
device could be an ignition source
Gases with an ignition point of 135°C or higher
Gases with an ignition point of 100°C or higher
Gases with an ignition point of 85°C or higher
Class IIC explosive gases
Intrinsically safe explosion-proof structure
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