AS NZS IEC 60947.5.6-2015 pdf free download – Low-voltage switchgear and controlgear Part 5.6: Control circuit devices and switching elements—DC interface for proximity sensors and switching amplifiers (NAMUR).
5 Characteristics
5.1Control input of the switching amplifier
The binary output signal of the switching amplifier shall only change when the operating pointof the control circuit is within the relevant actuating range (see figure 3).
5.2 Interaction between proximity sensor and switching amplifier
The proximity sensor shall be designed in such a way，that when actuated by the intendedinfluence the current-voltage characteristic reliably reaches the “high impedance” and“lowimpedance” states.
The “high impedance” state is shown in figure 4 and the “low impedance”state in figure 5.
NOTEThe limits for the permitted characteristic range of the proximity sensor and the switching amplifier havebeen selected so as to provide a safety margin.
5.3Continuous characteristic
Within the actuating range (Al1):
a) the output signal of the proximity sensor shall be adjustable;
b) the slope of the characteristic shall be either positive or negative and there shall be no
hysteresis (see the example in figure 1).
5.4 Discontinuous characteristic
Within the actuating range (Al1):
a) the output signal of the proximity sensor shall not be adjustable, andb) the characteristic shall have hysteresis (see the example in figure 2).5.5Switching current difference
The preferred value of the switching current difference is 0,2 mA. The preferred position ofthe switching current difference is the centre of the actuating range (Ah).
5.6 Line resistance
The line resistance shall not exceed 50 2.
5.7 lnsulation resistance
The insulation resistance shall not be less than 1 MQ2.
6Product information
Characteristic product data shall be stated by the manufacturer together with details of themeasuring procedure.
6.1 Proximity sensors
For proximity sensors such characteristic data shall include the following:a) operating frequency;
b) slope with continuous characteristic;
c) switching travel difference with discontinuous characteristic;d) rated operating distance;
e) time delay before availability.
The above data shall be related to the rated operating conditions according to 9.2.f) operating, transport and storage temperature range;
g) direction of action，i.e. details of how the low impedance or high impedance state is reached;
h) installation instructions;
lPdegree of protection (according to lEC 60947-1,annex C);
)influence of variations of the supply voltage and ambient temperature on the characteristic data.
6.2 Switching amplifiers
For switching amplifiers the data to be provided by the manufacturer shall include thefollowing:
a) rated supply voltage(s);
b) operating frequency and switching times;c) switching current difference;
d) position of the switching points for the switching current difference in accordance with c);
e) operating, transport and storage temperature range;
f) assignment of the output signals to the monitoring and actuating ranges;g) description of the output signals;
h) influence of variations of the supply voltage and the ambient temperature on the characteristic data;installation instruction;
j)lPdegree of protection (according to lEC 60947-1, annex C).AS NZS IEC 60947.5.6 pdf download.