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This electronic proximity sensing switch incorporates a variable delay
on the output, making it an extremely versatile device in many industrial
applications. The high switching hysteresis makes it particularly
suitable for dusty environments (e.g. grain, feedstuffs, powders) where
filling level control is required.
Capacitive action - senses all materials
Operation
1. Connect the proximity switch according to the diagram:
Note: Switch contacts shown in Òmaterial sensedÓ condition.
2. With the sensing face clear of material apply the 230V ac mains.
The output will be shown in diagram fig. 1 above for the delay period
(LED flashing), when the delay has expired the relay will change
over (LED on). Bringing material close to the sensing face will then
cause the relay to change back to that shown in fig. 1.
3. RANGE and DELAY may be set for individual applications:
A small screwdriver is supplied to facilitate adjustments.
Note: The delay is factory pre-set to minimum.
4. The LED is OFF when material is sensed, and FLASHES when not
sensing during the preset delay, the flash rate is proportional to the
delay selected i.e. fast flash-short delay, slow flash-long delay. The
LED is ON when the material is not sensed and the delay has
expired.
Application
It is recommended that distances between the delay proximity switch
and any overcurrent protection devices and/or any external switch or
contact breaker be kept to a minimum. The delay proximity switch
should be protected with overcurrent devices appropriate to the
application and the leads connected in accordance with best industry
practice so that live parts are not accessible.
A typical application circuit using the Delay Proximity Switch is shown
in figure 3. This may be used in a system as shown in figure 4.
Explanation of label symbols
Equipment protected by double insulation
CAUTION - Live
parts
!
connection
Technical Specification
Supply
Nominal voltage ________________________________220/240Va.c.
Nominal frequency
________________________________50/60Hz
Power consumption ____________________________________1VA
Switch
Relay change over contacts
Max. voltage __________________________________220/240Va.c.
max. current ____________________________5 Amp. ac (resistive)
Power Up
Sensor activated, material around it __________Relay will not pull in
Sensor not activated,
no material around it __________First-time delay, then relay pulls in
Sensor
Sensitivity Factory pre-set.
Time delay
__________________Adjustable from 2 sec. to 10 min.
Sensing range __________________________________0 to 15mm
RS Stock No.
-leads
require
secure
______By removing transparent sealing,
adjustment screw is accessible
Flashing L.E.D. indicates the time delay
General
Environmental sealing __________________________________IP67
Ambient temperature range, working ____________-10¡C to + 55¡C
341-474
Length
__________________________________________132mm
Weight (including cable) ________________________________380g
Diameter __________________________________Maximum 33mm
Cable ______________5-core 0.75mm2, o.d. 10mm, length 1500mm
Cable colour code
Supplied with adjustment screwdriver and mounting gland.
RS Components shall not be liable for any liability or loss of any nature (howsoever
caused and whether or not due to RS ComponentsÕ negligence) which may result
from the use of any information provided in RS technical literature.
Este interruptor electr—nico sensible a la proximidad incorpora un
retardo variable en la salida, caracter'stica que lo convierte en un
dispositivo extremadamente vers‡til en un gran nœmero de
aplicaciones industriales. Su alta capacidad de histŽresis lo hace
especialmente adecuado para entornos con mucho polvo (grano,
pienso, polvos, etc.), donde es necesario controlar el nivel de llenado.
Acci—n con capacidad: detecta todo tipo de material.
Funcionamiento
1. Conecte el interruptor de proximidad segœn el diagrama (figura 1).
Nota: Los contactos del interruptor se indican en la condici—n de
"material detectado".
2. Con las caras sensibles limpias de material, aplique el suministro de
red de 230 V CA. El resultado se indicar‡ en el diagrama de la fig.
1 anterior en el caso del per'odo de retardo (el indicador LED
parpadea); cuando el per'odo de retardo haya terminado, el relŽ
cambiar‡ (el indicador LED permanecer‡ encendido). Si acerca
material a la cara sensible, el relŽ volver‡ a la situaci—n ilustrada en
la figura 1.
3. La GAMA y el PERêODO DE RETARDO deber‡n regularse para
cada aplicaci—n concreta (figura 2). Se suministra un peque–o
protected
destornillador para facilitar las regulaciones.
Nota: El per'odo de retardo viene predeterminado de f‡brica en su
duraci—n m'nima.
4. El indicador luminoso LED permanece apagado cuando se detecta
el material y parpadea cuando no detecta material durante el
per'odo de retardo fijado; la frecuencia del parpadeo es
inversamente proporcional al per'odo de retardo seleccionado, es
decir, si el parpadeo es r‡pido, el retardo es corto, y viceversa. El
indicador LED permanece encendido cuando no se detecta material
alguno y el per'odo de retardo ha terminado.
Aplicaciones
Es recomendable que la distancia entre el interruptor de proximidad de
retardo y cualquier dispositivo de protecci—n contra sobrecargas
elŽctricas o cualquier interruptor externo o disyuntor de contacto sea la
m'nima posible. Se debe proteger el interruptor de proximidad de
retardo con dispositivos contra sobrecarga adecuados a la aplicaci—n;
adem‡s, la conexi—n de los cables se debe realizar respetando las
mejores pr‡cticas del sector, de modo que no se tenga alcance a
ninguna pieza conductora.
En la figura 3 se puede observar un circuito de aplicaci—n habitual para
el interruptor de proximidad de retardo. Dicho circuito puede utilizarse
en un sistema tal como indica la figura 4.
V4736
Power input (phase) - Brown
Power input (neutral) - Blue
Relay contacts - Black
C—digo RS.
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