MAGNETIC SENSORS
MAGNETIC SENSORS
Working Principle:
Magnetic proximity switches operate using reed contacts within a glass bulb filled with inert gas. These contacts respond to magnetic fields, causing the plates to flex and establish an electrical connection. The surface treatment of these plates makes them ideal for low current or high inductive circuits. Advantages over traditional mechanical switches include protection against dust, oxidation, and corrosion, maintenance-free operation, and compact size.
Output Functions:
- Normally Open (N.O.): The contact closes when a magnet approaches, using two wires.
- Exchangeable (S): Offers both N.O. and N.C. functions in one bulb, activated by magnet proximity, using three wires.
- Bistable Function: An internal magnet pre-polarizes the contact, which remains closed with a matching polarity magnet until an opposite polarity magnet is introduced.
Technical Specifications:
Available in various models with plastic or metallic housing, cylindrical or rectangular shapes, and an IP67 protection rating. They include 2-meter PVC cables. Lifespan depends on mechanical characteristics at low tension and current, while load characteristics are crucial at high values. External protection is advised for high tension and current applications.
Sensing Distance:
Varies based on magnet type and installation surface. Standard operation involves non-ferromagnetic surfaces and frontal magnet approach, but lateral magnet operation is possible. Ferrous surfaces require non-magnetic spacers to prevent magnetic flux dispersion.
Custom Models:
AECO provides custom models with various mechanical and electrical modifications, including different reed bulbs, high-temperature applications, multiple output contacts, and ATEX safety versions. Custom electrical wiring options are also available.
Switching Power Diagrams:
Diagrams show the relationship between voltage and current for different models, indicating maximum switching power capabilities.
Catalog excerpts
AECO_103-108_2010.qxp:AECO_103-108_2010 15-07-2010 19:07 Pagina 104 SENSORI MAGNETICI SERIE SMC - SMP MAGNETIC SENSORS SMC - SMP SERIES WORKING PRINCIPLE PRINCIPIO DI FUNZIONAMENTO I sensori di prossimità magnetici sono costituiti da contatti reed le cui lamine di materiale magnetico, racchiuse in un bulbo di vetro contenente gas inerte, sono sensibili all’influenza di campi magnetici generati da magneti permanenti, che producono sulle lamine per il fenomeno di induzione magnetica, polarità di segno opposto. Quando la forza di attrazione supera la resistenza elastica delle lamine, queste si flettono...
Open the catalog to page 2
AECO_103-108_2010.qxp:AECO_103-108_2010 15-07-2010 19:07 Pagina 105 SENSORI MAGNETICI SERIE SMC - SMP MAGNETIC SENSORS SMC - SMP SERIES DISTANZE DI INTERVENTO SENSORE - MAGNETE SENSORS AND MAGNETS SENSING DISTANCE Nella tabella sono riportati due valori di distanza (D/C) in mm. Quello a sinistra della barra si riferisce alla distanza di intervento, quello a destra definisce il valore di isteresi al di sotto del quale il contatto si diseccita (vedi esempio di funzionamento). I dati della tabella hanno valore approssimativo e sono riferiti ad applicazioni su superfici non ferromagnetiche e con...
Open the catalog to page 3
AECO_103-108_2010.qxp:AECO_103-108_2010 15-07-2010 19:07 Pagina 106 SENSORI MAGNETICI SERIE SMC-SMP • MAGNETIC SENSORS SMC-SMP SERIES • MODELLI CON CUSTODIA PLASTICA O METALLICA / MODELLI CILINDRICI E PARALLELEPIPEDI / GRADO DI PROTEZIONE IP67 / CAVO PVC LUNGHEZZA 2 MT • MODELS WITH PLASTIC OR METALLIC HOUSING / CYLINDRICAL AND RECTANGULAR MODELS / IP RATING 67 / PVC CABLE 2 MT. LENGTH CARATTERISTICHE TECNICHE TECHNICAL CHARACTERISTICS Dimensioni / Dimensions mm MODELLI CON CONTATTO N.O. MODELS WITH N.O. CONTACT MODELLI IN SCAMBIO CHANGEOVER MODELS Distanza di intervento sn* Switching distance...
Open the catalog to page 4
AECO_103-108_2010.qxp:AECO_103-108_2010 15-07-2010 19:07 Pagina 108 DIAGRAMMI DI COMMUTAZIONE • SWITCHING POWER DIAGRAMS D1 V D2 200 V 200 150 100 50 50 0 I 0 0,2 0,4 0,6 0,8 300 200 100 I 0 0 1 V 500 400 150 100 D4 D3 0,2 0,4 0,6 0,8 I 0 1 0 0,5 V V 500 D5 400 D6 225 175 150 125 125 100 100 75 0,5 1 1,5 2 2,5 50 25 I 0 75 50 0 0 3 3 225 150 100 2,5 200 175 200 2 250 200 300 1,5 V 250 1 25 0 0,6 1,2 1,8 2,4 3 A 0 0 0,6 1,2 1,8 2,4 3 A MAGNETI - MAGNETS MODELLO MODEL M-16 M-20 M-30 ACM000004 ACM000006 ACM000007 Plastoferrite Plastoferrite MODELLO MODEL Ferrite Ferrite Ferrite Ferrite M-300 M-302...
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