AS NZS IEC 60947.5.6:2015 pdf free

AS NZS IEC 60947.5.6:2015 pdf free.Low-voltage switchgear and controlgear
AS NZS IEC 60947.5.6 applies to proximity sensors connected for operation by a two-wire connecting cable to the control input of a switching amplifier. The switching amplifier contains a d.c. source to supply the control circuit and is controlled by the variable internal resistance of the proximity sensor.
These devices can be used in an explosive atmosphere if they also comply with IEC 60079-11.
NOTE These devices have been defined by the German organization “NormenausschuB fur MeB- und Regelungstechnik (NAMUR)” (Office for Standardization of Measurement and Regulation Techniques).
The following normative documents contain provisions which, through reference in this text,constitute provisions of this International Standard. For dated references,subsequent amendments to, or revisions of, any of these publications do not apply. However, parties to agreements based on this International Standard are encouraged to investigate the possibility of applying the most recent editions of the normative documents indicated below. For undated references, the latest edition of the normative document referred to applies. Members of IEC and ISO maintain registers of currently valid International Standards.
IEC 60079-11:1999, Electrical apparatus for explosive gas atmospheres一Part 11: Intrinsic safety“i”
IEC 60947-1:1999, Low-voltage switchgear and controlgear一Part 1: General rules
IEC 60947-5-2:1999， Low-voltage switchgear and controlgear 一Part 5-2: Control circuit devices and switching elements – Proximity switches
relationship of the output signal (the current value) in the steady state to the distance of the influencing body relative to the sensor. Both continuous and discontinuous characteristics are permitted (see 5.3 and 5.4, and figures 1 and 2)
range defined by four straight lines in the current-voltage graph of the control input of the switching amplifier to which is assigned a switching function of the switching amplifier.There are three actuating ranges covered by the current-voltage characteristic of the control input (see figure 3, a, b and d)
The proximity sensor shall be designed in such a way, that when actuated by the intended influence the current-voltage characteristic reliably reaches the “high impedance” and “low impedance” states.
The“high impedance” state is shown in figure 4 and the “low impedance” state in figure 5.
NOTE The limits for the permitted characteristic range of the proximity sensor and the switching amplifier have been selected so as to provide a safety margin.AS NZS IEC 60947.5.6 pdf free.