7ML19985JB02 SITRANS Probe LU (PROFIBUS PA) – INSTRUCTION MANUAL Page 105
mmmmm
J: Hazardous installation
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 24 V and its output current (I
o
) limited
by load resistance (R
o
); such that I
o
= U
o
/ R
o
, does not exceed 250 mA.
Notes
• The installation must comply with national requirements.
• The safe area is unspecified except that it must not be supplied from nor contain,
under normal or abnormal conditions, a source of potential with respect to earth in
excess of 250 V rms or 250 V DC.
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