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
5.1 Control input of the switching amplifier
The binary output signal of the switching amplifier shall only change when the operating point of 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 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.
5.3 Continuous characteristic
Within the actuating range (I):
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 (tI):
a) the output signal of the proximity sensor shall not be adjustable, and
b) the characteristic shall have hysteresis (see the example in figure 2).
5.5 Switching current difference
The preferred value of the switching current difference is 0,2 mA. The preferred position of
the switching current difference is the centre of the actuating range (tI1).
5.6 Line resistance
The line resistance shall not exceed 50 11.
5.7 Insulation resistance
The insulation resistance shall not be less than 1 Mi.
6 Product information
Characteristic product data shall be stated by the manufacturer together with details of the measuring 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;
i) IP degree of protection (according to IEC 60947-1, annex C);
j) influence of variations of the supply voltage and ambient temperature on the characteristic data.AS NZS IEC 60947.5.6 pdf download.