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The NAMUR signal standard takes this philosophy one step further by defining specific diagnostic meaning to values of current lying outside the 4-20 mA range: NAMUR-compliant transmitters are designed to limit their output signals between 3.8 mA and less than 21 mA when functioning properly. Signals lying outside this range indicate some form ...
12. Apr. 2018 · 14. NAMUR is a signaling standard, used primarily on proximity and limit switch devices. It outputs a current signal depending on the state of the switch. The switching spec is >2.1mA (typically but not always for NC) and <1.2mA for the opposite switch state. There is a 0.9mA deadband for noise immunity. The output is usually characterized at ...
23. Aug. 2012 · What is the definition of Namur NE43. Namur NE43 specifies a sensor fault is signaled by extending the range of the 4-20mA signal. When the loop current is below 3,6 mA or above 21 mA this is interpreted as a sensor fault. In order to avoid false alarms, the signal shall be present for at least 4 seconds before it is interpreted as sensor fault.
20. Nov. 2019 · NAMUR NE 43 is the standardization of such fault signal information. NAMUR NE 43. As above said NAMUR NE 43 gives clarity on how a sensor fault can be indicated to the control system by means of the same 4-20 mA. NAMUR NE 43 can be defined as: Through extending the range of the 4-20mA signal, a sensor failure is indicated. This is interpreted ...
13. Jan. 2017 · Obsolete NENA. Access Conditions. Current NAMUR Recommendations (NE) and Worksheets (NA) To access the documents at NAMUR, please login! If individual documents are only sporadically required for your own use each year, NAMUR recommendations and NAMUR worksheets can also be obtained individually from DIN Media.
26. Juli 2021 · NE 43 has been revised. from 2021-07-27. The NAMUR Recommendation NE 43 has been revised and may now be obtained from the NAMUR Office. The change compared to the previous edition of NE 43 (2003-02-03) mainly concern the introduction of a safety margin for signal detection in control systems and the device behavior during initialization.
Direction of operation can be selected (operating or closed circuit current behavior) Ex i NAMUR signal conditioner. For operating proximity sensors and switches in a potentially explosive area. The signals are transmitted by a relay output (changeover contact) to a safe area. Line fault detection (LFD), 3-way isolation, SIL 2.
