1093
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Consider the General Notes on the Information in the Pepperl+Fuchs Product Catalogs
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Additional Information
Glossary
A
BS
Acrylonitrile butadiene styrene
Absolute rotary encoder
Issues a unique encrypted numerical value
for each shaft position. The internal coded
disk enables an absolute measured value
to be read out after application of the supply
voltage. A reference run is not required.
Actuating direction
Objects can enter the sound beam from all
directions. All information included in the
catalog relating to trip points applies to the
axial approach of objects.
Adjuster
Operating element, usually a potentiometer
or rotary switch, used to adjust the response
sensitivity, operating distance, direction of
operation for the output, timer functions, etc.
Adjustment aid
The prefault diagnostics tool can be used to
help make adjustments. Sensors that use
visible red light can be adjusted visually. The
mounting aids included in the catalog enable
optimal adjustments to be made.
⇒ also Mounting aids
Adjustment insensitivity
Retroreflectors can be mounted and adjusted
by +25° from the reference axis.
Adjustment range
Range within which the trip point for a sensor
can be set.
Air humidity
The speed of sound increases by 2% from
dry to saturated air. As a result, the operating
distances reduces by a maximum of 2%. This
can usually be disregarded.
Air pressure
Under common atmospheric deviations
(
±5%), the speed of sound deviates by
around ±0.6% at a fixed location.
The resulting change in operating distance
can usually be disregarded.
Air temperature
The speed of sound is extremely dependent
upon air temperature. This can result in
the output values of an ultrasonic sensor
changing if the sensor is not temperature-
compensated.
⇒ Temperature compensation
Alarm
⇒ Fault indication
⇒ Prefault diagnostics
Ambient conditions
Pepperl+Fuchs ultrasonic sensors are
unaffected by dust, mist, rain, snow, or
audible noise. Deposits on the sensor
surface are usually avoided due to the self-
cleaning effect of the oscillating decoupling
layer.
Ambient temperature
According to the standard, photoelectric
sensors must be capable of operating at
temperatures of -5 °C to +55 °C.
The standard temperature range for
Pepperl+Fuchs sensors is -25 °C to +70
°C. The values applicable in each case are
included in the data sheets.
B
ackground/foreground sup-
pression
Measuring method that determines the
distance from the object using angle
geometry.
Binary code
A code based upon two digits that is also
used with absolute rotary encoders.
Blind zone
Zone in front of an ultrasonic sensor where
an object or reflector is not detected.
⇒ Section Detection range
⇒ Adjustment range
C
able length
This can be up to 300 m for sensors
with internal evaluation. If the cable is used
to communicate via the RS232 interface, the
maximum cable length is reduced to 100 m.
The cable must be shielded in case of high
interference levels.
The cable length for sensors without
evaluation (H1/2/3 sensors) must not exceed
50
m.
Cams 1, 2
(
A**58 parameterizable)
The AVE/AVM58 absolute rotary encoders
incorporate a switching mechanism with two
cams. The cam signals are emitted via the
outputs or the SSI special bit
CE mark
The CE mark is a declaration by the
manufacturer that the labeled product
conforms to the applicable international and
European standards and guidelines.
Channel
Signal track of the incremental rotary
encoder.
Characteristic deviation
⇒ Measurement accuracy
Characteristic displacement
Adjustable offset by which the output
characteristic of a measuring sensor can be
displaced.
Close range
(
blind zone)
Area in which e.g., a diffuse mode sensor
can no longer detect an object.
⇒ Section Detection range
Code construction
It is possible to choose between open
and closed code construction for multiturn
absolute rotary encoders with a singleturn
resolution that is unequal to a power of two,
and when the Tannenbaum format is used,
provided that the measuring range has not
been moved. Open code construction means
that the position within a revolution and the
number of detected revolutions are arranged
separately. In all other instances, only closed
code construction is possible, i.e., the
resulting position value is already calculated
in the rotary encoder.
Code course
⇒ Counting direction.
Code rate
Maximum number of measuring step changes
per second.
Constant light
Light with largely constant radiant flux (e.g.,
daylight).
D
ark ON
The photoelectric sensor switches
through when there is no light falling on the
receiver optics. In a diffuse mode sensor, this
occurs when no object is close and in light
barriers, when an object breaks the beam.
Degree of protection
The standard EN 40050 classifies the
protection of electrical apparatus against
contact, the ingress of objects or water
through the housing, covers, etc. The IP
abbreviation is made up of the letters IP
(
International Protection) and two numbers:
1
st Number:
Degree of protection against contact and the
ingress of objects
2
nd Number:
Degree of protection against the ingress of
water
⇒ Table Degrees of protection through
housing
Detectable object
⇒ Standard measuring plate
Detection difference
Difference in the detection range depending
on the reflectivity of the objects to be
detected. In particular, this specification
characterizes diffuse mode sensors with
background suppression and ultrasonic
sensors in detection mode.
Detection range
Range within which an object or reflector
can be reliably detected or within which the
operating distance can be set. In accordance
with EN 60947-5-2, the terms scanning range
and sensing range are replaced with the term
detection range.
This range is determined when applying the
rated operational voltage Ue at an ambient
temperature of 20 °C and relative humidity
of 50%. In the case of ultrasonic thru-beam
sensors, the receiver (or the measuring plate
in the case of diffuse mode sensors) is moved
in an axial direction towards the sensor.
The switching element function must switch
reliably in detection area sd.
