Inductive sensors are signal generators which detect function-related
movements at processing machines, robots, production lines, conveyor
systems etc. in a contactless fashion, and transform them into
electrical signals. An
electrical signal is generated when a metallic object approaches the
active surface of the inductive sensor and is situated within the
specified switching distance.
Inductive sensors detect and
acquire all electrically conductive objects which pass through or
remain within the high-frequency magnetic field of the oscillator,
without making contact with the sensor.
Inductive sensors
function in a contactless fashion, i.e. no mechanical force acts upon
the control device or the parts to be sensed.
Inductive sensors
do not require any sensing mechanisms. Rollers, stems or lever arms
commonly used for mechanical limit switches are unnecessary.
Inductive
sensors operate without mechanically actuated electrical contacts, i.e.
switching is accomplished by means of electronic components.
- SIEN sensors with standard switching distance, for direct voltage, round design - SIED sensors with standard switching distance, for direct and alternating voltage, round design - SIES sensors with standard switching distance, for direct voltage, block design - SIEN-PA corrosion resistant sensors with standard switching distance, for direct voltage, round design - SIED-PA corrosion resistant sensors with standard switching distance, for direct and alternating voltage, round design - SIEH sensors with extended switching distance, for direct voltage, round design - SIEA sensors with analogue output, for direct voltage, round design - SIEF sensors with standard switching distance and a reduction factor of 1 for all metals, for direct voltage, round design -
SIEF-WA welding-field immune sensors with standard switching distance
and a reduction factor of 1 for all metals, for direct voltage, round
or block design
Variants Round design: - Cylindrical, 3 mm diameter - Cylindrical, 4 mm diameter - M5 external thread - Cylindrical, 6.5 mm diameter - M8 x 1 external thread - M12 x 1 external thread - M18 x 1 external thread - M30 x 1.5 external thread
Block design
- Operating voltages: 10 to 30 V DC 15 to 34 V DC 20 to 265 V AC, 20 to 320 V DC - PNP or NPN output - Sensors for distance measurement with analogue output - NC, NO or antivalent contacts - Flush or non-flush mounting - With standard or extended switching distance - Corrosion resistant variants - Welding-field immune variants - Plug or cable connection, or terminal connection - Two-wire variants
Features: - No mechanical wear and tear, resulting in long service life - No downtime due to dirty or welded-together contacts - No contact bounce, and thus no switching errors - High switching frequencies of up to 3000 Hz - Vibration-resistant - Any desired mounting position - LED for switching status indication - Fully encapsulated, thus providing IP 65 protection
SM-TEST-1 sensor tester The
sensor tester is used to test and adjust sensors and proximity
switches. The sensor tester facilitates commissioning and servicing
work. - Voltage supply for testing proximity switches for correct operation - Adjustment of proximity switches while attached to cylinders -
Identification of the switching output at proximity switches and
sensors with PNP, NPN, NC and NO functions by means of the appropriate
LED.
Note- Nominal switching distance Sn: Characteristic value with no allowance for production tolerances or deviations due to temperature or voltage.
Actual switching distance Sr: The
actual switching distance is determined at the rated operating voltage
and at an ambient temperature of 293 K (20° C). May deviate from the
nominal switching distance by a maximum of ±10%.
Effective switching distance Su: This
is the switching distance for a given sensor within defined voltage and
temperature ranges. It may deviate from the actual switching distance
by a maximum of ±10%.
Guaranteed switching distance Sa: This
is the switching distance at which the sensor will operate throughout
the entire range of permissible operating conditions. It lies between 0
and the lowest value for useful switching distance.
Normally open contact When
the sensor is attenuated, current flows through the load, when the
sensor is not attenuated, the flow of current is interrupted.
Normally closed contact When
the sensor is attenuated, the flow of current is interrupted, when the
sensor is not attenuated, current flows through the load.
Antivalent: Both outputs (NO and NC contacts) are available.
Type of installation Flush-mounted
sensors can be surrounded by metal right up to the level of the active
surface. Non-flush-mounted sensors require a metal-free zone around
their active surface. Sensors without threads should be bonded in with adhesive if possible.
Sensors
can be clamped in with moderate pressure, which should be distributed
over as large an area as possible. Concentrated pressure, e.g. produced
by grub screws, can easily cause damage to sensors.
Sensors may not be used as end stops.
SIED
sensors for alternating voltage are class A products. These sensors may
cause radio interference in household environments. Users should
implement suitable counter-measures if necessary.
