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[simatic sensors] Inductive Proximity Switches SIMATIC PXI
°ü¸®ÀÚ (kisystem) | 2008-04-29 | HIT: 2716
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Inductive Proximity Switches SIMATIC PXI
Instinctive Response to Metal

When identifying metal objects without contact, inductive proximity switches are simply the most cost-effective solution. If an electrically or magnetically conductive object approaches or leaves, they automatically send out a signal change. Inductive proximity switches are extremely reliable with a high repeat accuracy. And thanks to wear-free operation as well as resistance to temperature, noise, light or water, they have a markedly long service life. We cover the complete application spectrum with a large variety of designs and transmission ranges.


Highlights
 Extremely compact and rugged
 High degree of protection (IP67/IP68/IP69K)
 Correction factor 1
 High sensing ranges
 Fast switching frequencies
 Flexible mounting
 Especially suitable for small spaces
 UL/CSA approvals


Function
A high-frequency alternating field is generated in the proximity switch and emerges at the "sensing face". The physical size of this alternating field determines the "range" of the device. When a material that is a good conductor of electricity and/or magnetism comes into close proximity with the sensing surface, the field is damped. Both states (field damped or undamped) are evaluated in the proximity switch and result in a change in the output state of the switch.


Built-in protection

Spurious switch-on pulse

 Short-circuit and overload (DC)

Swapped connectors

 Wire-break (connection L- or L+)

Overvoltage peaks

 Radio interference

Spurious signal suppression

Classification
The inductive proximity switches are classified in accordance with their applications or their technical characteristics:
 

  for standard duty

 for PLCs (2-wire)

for extra duty

 for extreme environmental conditions (IP69 K)

with greater operating distance

 without a reduction factor

pressure-resistant up to 500 bar (7250 psi)

 with analog output

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