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The Intrinsic Safety Specifications of Pointek CLS 500 have been defined and approved as
follows:
toepassing
current loop insulated from the measuring circuit
internal capacitance
internal inductance
maximum supply voltage
maximum current
maximum power consumption
Pointek CLS 500 can be directly connected to an intrinsically safe supply for intrinsically
safe applications. For non-intrinsically safe operations, such as explosion proof, a safety
barrier must be used.
The operation of Pointek CLS 500 conforms to the following:
NAMUR recommendation NE 43
This recommendation describes rules by which analog transmitters transfer their
information to DCS equipment. This information can be divided into two types:
•
measurement information
For measurement information the current signal should be within the range of
3.8 to 20.5 mA.
•
failure signalling
For failure information which indicates a failure in the measuring system
current signal should be in the range of either 0 to 3.6 mA, or 21 mA or greater.
The application will determine which of these two ranges is more desirable.
Pointek CLS 500 can be set for 3.6 mA, or 22 mA, as required.
1.
It may also signal a process level outside the Upper and Lower Sensor Limits, if
the unit has been programmed for this. For more information, see
on pagina 13.
Pagina 102
Pointek CLS 500 – GEBRUIKERSHANDLEIDING
Specificaties
3.6-22mA
can be ignored
10 µH
30 Vdc
200 ma
1.5 W
1
the
Foutdetectie
7ML19985GG41
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