Page 94 SITRANS Probe LU (HART) – OPERATING INSTRUCTIONS A5E32337695
G: Hazardous Installation
FM/CSA
• Approved dust-tight and water-tight conduit seals are required for outdoor
NEMA 4X / type 4X / NEMA 6, IP67, IP68 locations.
• The maximum voltage of the non-intrinsically safe apparatus must not exceed 250 V rms.
• Recommended intrinsically safe barriers are listed on page 95.
EU Equivalency
Any zener diode safety barrier, certified by an EU approved certification body to
[ EEx ia ] IIC, its output voltage (U
o
) not exceeding 30 V and its output current (I
o
) limited
by load resistance (R
o
); such that I
o
= U
o
/ R
o
, does not exceed 120 mA.
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