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Technische Daten:
 
Promitity switch working principle
Promixity switches also called proximity sensors.Sensor can devided idto inductive type. capacitive typm simulative type, Hall type4 magnetic type.Sensor can support using of PLC programmable controller. SCM. Sr circuit . Electronic counters, Solid-state relay, Small relays and other products. Capacitive proximity switch are composed by High frequency concussion and amplification.Sensor detection surface and between the earth form a capacitor participate Oscillation circuit work , starting at the stop vibration state.When the object near the surface,The circuit capacity changes,is the Oscillation of high-frequency oscillator .The two states of Oscillator- Oscillations md stopping vibration, Convened to electrical signals through the shaping amplifier Switch into binary signals. Simulative sensor (also known as the linear displacement sensor), when the metal object close to the detection surface.With the change of the distance,then output the singal which have linear relationship changes with the distance ,So as to achieve the purpose of monitoring. Hall sensor is a kind of proximity sensor which inside with Hall 1C.Using Hall effection convert magnetic signal on or off into switch capacity.Widely used in signal detection, automatic control and safety protection. Magnetic sensor are composed by reed tube and amplificationo When the external magnetic field near the magnetic reed sensor to force the action, and then amplified by the amplifier, increasing the switching capacity, in order to realize the on-off control of external circuits.
 
Action distance
Operating distance is the most important parameter of the proximity switch . which mainly depends on the proximity switch sensing face diameter, sensing target material and ambient temperature also affects the proximity switch movement distance. For magnetic. Ha]] sensor, installed on the iron plate or on the items which with the magentic strength, also affects the movement distance:There are two actiion ways of the proximity switch: Axial close and Radial close , Generally using axial approach.

Rated sensing distance (Sn)
It‘s a standard value without regard to the influence of external environment
 
Standard detection sheet
The detection sheet is designed into square type. The thickness is I mm, the material is ST37 with smooth surface and the side length is 3 x Sn. The alternation of the detection object dimension or material will attenuate the inductive range.
 
Effective action distance (Sr)
The action distance detected at the rated operating voltage and room temperature (23 ±5°C): 0.9 Sn <= Sr <=1.1 Sn
 
Practicable action distance (Su)
The action distance detected when the input voltage is in the range of 85% to 110% the rated voltage and the switch works at the allowable ambient temperature -25°C to +70°C:  0.9 Sr <= Su <= 1.1 Sr
 
Reliale action distance(Sa)
When the measure object is in this action distance, the action of the switch is reliable: 0 <= Sa <= 0.81 Sn
 
Repeatability precision (R)
It is the convert value of the effective action distmce that is measured in 8 hours when the ambient temperature is 23°C, relative humidity is random and the service voltage is Ue±5: R= 0.1 Sn
 
Ensure the switch tmaking distance
When the distance between the detection sheet and the switch inductive surface is larger than the rated action distance, ensure the switch is disconnected.
 
Attenuaton
Attenuation coefficient means how much the action distance of a certain kind of material is attenuated when St37 steel is used as detection sheet. For inductive type proximity switch, the electrical  onductivity of the detection sheet material is the main parameter affecting attenuation coefficient
 
Inductive proximity switch on the pall of the material attenuation coefficient
 
Material         Attenuation Coefficient
Steel              1.0
Slainless Steel    0,85
Aluminum           0.4
Brass              0.4
Bronze             0.3
 
Capacitive proximity switch on the pat of the material attenuation coefficient
 
Material     Attenuation Coefficient
Earth plate         1.0
Water               1.0
Alcohol             0.75
Ceramic             0.6
PVC                 0.45
 
No-load current (ID)
It means the current consumption that is measured when the proximity switch is on no-load.
 
Operating current (IL)
It means the maximum load current when the switch works continuously.
 
Instantaneous current (IK)
It means the allowable current in a short lime that doesn't ruin the switch when the switch is closed
 
Residual current (IR)
It means the current that goes through the load when the proximity switch isdisconnected.
 
Operating voltage (UB)
It means the maximum and minimum of the operating voltage. In this range, the proximity switch can ensure the safe operation
 
Voltage dop (LID)
It means the voltage measured at the both ends of the switch when the switch is turned on.
 
Operaing freqµency (F)
It means the maximum switching times from the attenuation state to non-attenuation state, shown as Hz.
 

Promixity switch installation method
 
Cylindrical type proximity switch
Non-screen shield type proximity switch can achieve the biggest action distance (related to the diameter): but in order to avoid the influence from the metal surrounding the switch to the switch, the switch inductive head must keep a certain space with the surrounding metal. The inside special screen shielding of the screen shield type proximity switch makes the magnetic field of side radial decrease and the sensing distance is about 60% that of the non-screen shield type, therefore it can be flush mounted inside the metal. Magnetic type sensor doesn't affected by the installation condition, as long as the surrounding materials aren't be magnetized.

Series and parallel connection of proximity switch
OR connection (NPN and PNP types can be used mixed ) series when the proximity switch is OR connected, the action of any proximity switch can drive load. The quantity of the proximity switches depends on the sum of leakage current. More connections are available given that it doesn't affect the loading action.
 
AND connection (series)
When the proximity switch is AND connected, the action of all proximity switches can drive load. The quantity of the proximity switches depends on the sum of saturation voltage. More connections are available given that it doesn't affect the supply voltage of the proximity switch. The response frequency of the proximity switch is the accumulation of initialized reset of various proximity switch.
 
Series and parallel connection ofproximily switch
AND connection (series) NPN, PNP mixed-use

Matters needing attention

Cautions when connected or disconnected with the power supply
When connecting the proximity switch with the counter and the programmable controller, there isn't any problem because of the built-in initialized reset circui Please avoid the conditions mentioned below. The detection object lies around the detection distance of the proximity switch; For DC voltage type and DC switch type, when power supply is turned on (tured LED off), time constant rises (drops) greatly; There is self-excitation and noise when the AC switch type proximity switch is power-on (off)

Capacitor, light load

The proximity switch can't have the capacitor or light that has larger jumping current as the load directly connected to be connected through a relay or series connected with a current-limiting resistance. The peak cuttent set by current-limiting resistance Ris within the load cuttent of the procimity switch:Make sure to connect through load.The proximity switch can't have the capacitor or light that has larger jumping current as the load directly connected to be connected through a relay or series connected with a current-limiting resistance. The peak cuttent set by current-limiting resistance Ris within the load cuttent of the procimity switch; Make sure to connect through load.

               Supply voltage V
________________________________________________ <= R (Kohm)
  Peak load current value of proximity switch mA


Allowable loss of resistance R(W)

  Supply voltage V2
__________________ x 2 times above
    <=R (Kohm)
 
Installation notice of proximity switch
Don't use it in the open air, in the environment with corrosive objects and use a protectivecover, if necessary. Don't knock the detection surface with hard objects and use a protective cover, if necessary. 

 


Auswahl:


 

LJ4A3
Induktive Näherungsschalter LJ4A3
Duchmesser:                       4 mm ohne Gewinde
shield type

Detection distance:               1 mm+-10%

 
Der Verkauf dieses Artikels wurde eingestellt. Bitte kontakten sie uns.
 
inkl. 19% MwSt. zzgl. Versand
LJ5A3
Induktive Näherungsschalter LJ5A3
Duchmesser:                       M5  mit Gewinde
shield type: screen
Detection distance:               1 mm+-10%
Der Verkauf dieses Artikels wurde eingestellt. Bitte kontakten sie uns.
 
inkl. 19% MwSt. zzgl. Versand
LJ6A3
Induktive Näherungsschalter LJ6A3
Duchmesser:                   6,5mm ohne Gewinde
shield type: screen
Detection distance:           1,5 mm+-10%
Der Verkauf dieses Artikels wurde eingestellt. Bitte kontakten sie uns.
 
inkl. 19% MwSt. zzgl. Versand
TL-Q5M
Induktive Näherungsschalter TL-Q5M
Maße:17 x 17 x 28mm
Messdistanz: 5mm
Der Verkauf dieses Artikels wurde eingestellt. Bitte kontakten sie uns.
 
inkl. 19% MwSt. zzgl. Versand
SD-3020/2020
Induktive Näherungsschalter SD-3020/2020
Durchmesser:        48mm
Höhe:               32mm
Detection distance: 20mm
Der Verkauf dieses Artikels wurde eingestellt. Bitte kontakten sie uns.
 
inkl. 19% MwSt. zzgl. Versand
J4-D8V
Hall-Sensor J4-D8V
Durchmesser:                  M18 x 1
Detection distance:           1..8 mm
Der Verkauf dieses Artikels wurde eingestellt. Bitte kontakten sie uns.
 
inkl. 19% MwSt. zzgl. Versand
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