2. Important Notices on Safety
2-5. Important information about explosion-proof
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2-5. Important information about explosion-proof
The detector head is an explosion-proof product.
The following provides information about the explosion-proof structure. Understand the information in this
section thoroughly before using the detector head.
Explosion-proof structure and class
The detector head employs the following explosion-proof structure and class. Use the detector head
according to the operating environment.
Explosion-proof structure: Intrinsically safe explosion-proof structure
Explosion-proof class: ExiaIICT4X
Certification body: Technology Institution of Industrial Safety
Applied standard: Recommended Practices for Explosion-Protected Electrical Installations in General
Industries
Electrical parameter
Intrinsically safe circuit allowable voltage (
U
i) : 28 V
Intrinsically safe circuit allowable current (
I
i) : 93 mA
Intrinsically safe circuit allowable power (
P
i) : 0. 65 W
Internal capacitance (
C
i)
: 586 pF
Internal inductance (
L
i)
: Negligible value
Operating temperatures: -20 - +50°C (*1)
Protective class of case: IP20 (Water-proof: None/Dust-proof: Up to 12.5 mm foreign solid material
protected)
Insulation performance: Meet JIS standard (between the power supply and case, 500 VAC, one
minute) under the condition that the capacitor connected to the terminal
plate has been removed.
System configuration
Make up the system as shown below.
Hazardous area
Non-hazardous area
Gas detector
Safety maintaining device
