<2. Handling Cautions>
2-17
IM 01S01C01-01EN
Note 3. Installation
• In any safety barrier used output current
must be limited by a resistor 'R' such that
Io=Uo/R.
• The safety barrier must be IECEx certified.
• Input voltage of the safety barrier must be
less than 250 Vrms/Vdc.
• The instrument modification or parts
replacement by other than authorized
representative of Yokogawa Electric
Corporation and will void IECEx Intrinsically
safe certification.
Non-Hazardous Location
Hazardous Location
F0214.ai
Terminator
Safety Barrier
Field Instruments
Indicator
Field Instruments
+
−
+
−
+
−
Terminator
+
−
+
−
[Intrinsically safe apparatus level of protection “ia”]
F0215.ai
Terminator
Associated
Apparatus
Terminator
+
−
+
−
[Intrinsically safe apparatus level of protection “ic”]
Non-Hazardous Location
Hazardous Location
Field Instruments
Indicator
Field Instruments
+
−
+
−
+
−
2.9 EU RoHS Directive
Applicable standard: EN 50581
2.10 Safety Requirement
Standards
Applicable standard:
EN 61010-1, C22.2 No.61010-1
(1) Pollution Degree 2
“Pollution degree” describes the degree to
which a solid, liquid, or gas which deteriorates
dielectric strength or surface resistivity is
adhering. “ 2 ” applies to normal indoor
atmosphere. Normally, only nonconductive
pollution occurs. Occasionally, however,
temporary conductivity caused by condensation
must be expected.
(2) Installation Category I
“Overvoltage category (Installation category)”
describes a number which defines a transient
overvoltage condition. It implies the regulation
for impulse withstand voltage. “ I ” applies to
electrical equipment which is supplied from the
circuit when appropriate transient overvoltage
control means (interfaces) are provided.
(3) Indoor/Outdoor use
Содержание FVX110
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