T30UXDC BANNER ENGINEERING, T30UXDC Datasheet - Page 2

• Manufacturer Part Number: T30UXDC
• Description: T30UX Series W/ Discrete Output
• Manufacturer: BANNER ENGINEERING

Specifications of T30UXDC

• Range: 300 Mm To 3 M
• Input: 10 To 30V Dc
• Output: NPN PNP NO NC Selectable
• Body Style: Round
• Range, Measurement: 300 mm to 3 m
• Response Time: 135 ms
• Voltage, Supply: 10-30 VDC
• Accessories Available: Cordsets and Brackets
• Lead Free Status / Rohs Status: RoHS Compliant part

U-GAGE
2
The U-GAGE
temperature compensation. Simple push button configuration provides flexibility for a variety
of applications.
Easy-to-see indicator LEDs communicate the status of the sensor (see Figure 1). The Green
“Power” LED ON indicates that the sensor is in Run Mode (the sensor’s normal operating
condition). The Red “Signal” LED indicates the target signal strength. The Amber “Output”
LED indicates that the output is enabled and the sensor is receiving a signal within the
window limits (depending on NO or NC). The Amber “Mode” LED indicates the currently
selected mode.
Ultrasonic sensors emit one or multiple pulses of ultrasonic energy, which travel through the
air at the speed of sound. A portion of this energy reflects off the target and travels back to
the sensor. The sensor measures the total time required for the energy to reach the target
and return to the sensor. The distance to the object is then calculated using the following
formula:
To improve accuracy, an ultrasonic sensor averages the results of several pulses before
outputting a new value.
Temperature Effects
The speed of sound is dependent upon the composition and temperature of the gas in which
it is traveling. For most ultrasonic applications, the composition of the gas is fixed, while the
temperature may fluctuate.
In air, the speed of sound varies with temperature according to the following approximation:
SI units:
Or, in US customary units:
Temperature Compensation
Changes in air temperature affect the speed of sound, which in turn affects the total time for
the echo measured by the sensor. An increase in air temperature shifts both sensing window
limits closer to the sensor. Conversely, a decrease in air temperature shifts both limits farther
away from the sensor. This shift is approximately 3.5% of the limit distance for a 20° C
change in temperature.
The T30UX series ultrasonic sensors are temperature compensated. This reduces the error
due to temperature by about 90%. The sensor will maintain its window limits to within 2.2%
over the -40° to +70° C operating range of the sensor.
NOTES:
• E xposure to direct sunlight can affect the sensor’s ability to accurately compensate for
• I f the sensor is measuring across a temperature gradient, the compensation will be less
changes in temperature.
effective.
D =
c =
t =
P/N 138381 rev. B
distance from the sensor to the target
speed of sound in air
transit time for the ultrasonic pulse
C
C
®
m/s
ft/s
T30UX is an easy-to-use ultrasonic sensor with extended range and built-in
= 20 √273 + T
= 49 √460 + T
®
D = c t
T30UX Series with Discrete Output
2
F
C
Principles of Operation
Overview
C
T
C
T
C
m/s
F
ft/s
= temperature in °C
= temperature in °F
= speed of sound in meters per second
= speed of sound in feet per second
Banner Engineering Corp. • Minneapolis, MN U.S.A
www.bannerengineering.com • Tel: [phone]
Figure 1. Features
Green Power ON/OFF LED
Amber Discrete
Output LED
Red Signal Strength LED
Amber
Mode
LEDs