942-A4N-2D-1F1-220S Honeywell, 942-A4N-2D-1F1-220S Datasheet - Page 2

• Manufacturer Part Number: 942-A4N-2D-1F1-220S
• Manufacturer: Honeywell

Specifications of 942-A4N-2D-1F1-220S

• Proximity Sensor Type: Ultrasonic
• Proximity Sensor Sensing Distance: 1500mm
• Proximity Sensor Sensing Distance Range: >=1200mm
• Proximity Sensor Switching Mode: NO/NC
• Mounting: Panel
• Operating Temperature Classification: Commercial
• Operating Supply Voltage (typ): 24V
• Operating Supply Voltage (max): 30V
• Pin Count: 3
• Output Type: PNP
• Lead Free Status / RoHS Status: Compliant

Ultrasonic Precision Proximity Sensors
Ultrasonic position sensors solve the tough-
est sensing problems. Ultrasonic sensors
detect targets made of virtually any material,
regardless of color. Clear, transparent, shi-
ny targets are seen as easily as dark and
opaque materials. Ultrasonic sensors de-
tect materials ranging from clear glass bot-
tles to black rubber tires without physical
contact. In a shrink wrapping operation, for
instance, the sensor can be applied so that it
ignores the shiny highly reflective wrap, and
concentrates only on the target. These high-
ly accurate sensors use a time lapse system
to provide background suppression.
Background suppression is the ability of the
sensor to detect the intended target and
ignore background materials, regardless of
color or reflectance.
HARSH DUTY APPLICATION
Ultrasonic sensors have the unique ability to
perform in dry, dusty environments. Ash,
soot, sawdust and the like do not impede
the ability of the sensor to perform accurate-
ly and repeatedly. Many other sensing tech-
nologies falter in this type of severe envi-
ronment.
TEMPERATURE COMPENSATION
Ultrasonic sensors use the surrounding air
as the transport medium for the ultrasonic
signal. The speed of sound in air varies as
the temperature changes. The sensors au-
tomatically compensate for these ambient
air temperature changes. A time elapsed
temperature compensation circuit in each
sensor
Honeywell MICRO SWITCH Sensing and Control 1-800-537-6945 USA
continually
adjusts
the
sensor to operate within
the setpoint, depending upon the listing,
over 0 to 50 C. They will operate over 0 to
70 C, but the temperature error will be
larger.
BACKGROUND SUPPRESSION
900 Series ultrasonic sensors sense the in-
tended target without sensing material lo-
cated just behind it. They operate on an
elapsed time measurement system. When
the sensor is adjusted to sense a target at a
given distance, a timing window is estab-
lished. The sensor accepts or acknowledg-
es only the echoes received within this win-
dow. Signals echoing from background ma-
terial take longer, and are not acknowl-
edged.
HIGH CARRIER FREQUENCY
Ultrasonic sound is defined as any sound
greater than 20,000 cycles per second (20
kHz). 900 Series operate between 130 and
300 kHz, and are more noise immune to air
and sound disturbances than sensors oper-
ating at lower frequency. Typical industrial
environments have a peak noise level be-
tween 40-50 kHz, causing false actuations
in ultrasonic sensors operating close to this
noise peak. 900 Series ultrasonic sensors
transmit a burst of high frequency sound
waves, much higher in frequency than the
noise in typical industrial environments.
1-815-235-6847 International 1-800-737-3360 Canada
0.2 to
0.5% of
INHIBIT/SYNC SIGNAL SETTING
With the exception of the low cost 945 Se-
ries, the 900 Series offer an Inhibit/Sync
function which controls the sensor’s mode
of operation. When the Inhibit/Sync wire is
connected to ground (0 VDC), the sensor is
placed in the inhibit mode.
Multiplexing/Synchronizing
Sensors; When two or more sensors are
mounted close to each other, acoustic in-
terference is possible. Inhibit multiplexes
the sensors so that only one transmits the
ultrasonic signal at a given time. Also, the
inhibit signal wires from all the sensors can
be connected together, synchronizing the
sensors to transmit at the same time.
FEATURES
Sense virtually any material:
– Solid or liquid
– Metallic or non-metallic
– Transparent, translucent or opaque
Background suppression
Temperature compensation
940 Series – 30 mm diameter cylindrical
high performance
– DC switching and analog outputs
– Preleaded or connector style
– Stainless steel or plastic (self-
– No external amplifiers necessary
– Sealed to IP 65
941 Series – Limit Switch Style
– High performance
– 2 set point switching outputs
– Analog output
– Micro connector style
– No external amplifiers needed
– Sealed to IP 65
942 Series – 30 mm diameter cylindrical
high performance stainless steel sensor
head, remote amplifier
– Sensor sealed to IP 65
– Remote amplifier sealed to IP54
– Compact sensor available
– Dual switching outputs
– BCD outputs
– HEX outputs
– Analog outputs
– Adjustable null and span
– High scanning range
945 Series – 18 mm diameter cylindrical
low cost/high performance
– Analog output
– DC switching outputs
– Plastic or stainless steel housings
– Sealed to IP 65
946 Series
– 30mm self contained stainless steel
– 2 setpoints or analog outputs
– Programmable
– Sealed to IP 65
– High scan range
contained) housing
housing
B79