Banner U-GAGE QT50U DC Series—Analog - Manual

Datasheet
Long-range ultrasonic sensors with TEACH-mode programming
• Fast, easy-to-use TEACH-Mode programming; no potentiometer adjustments
• Scalable output automatically distributes the output signal over the width of the
programmed sensing window
• Minimum and Maximum window limits can be adjusted independently
• Selectable 0 to 10 V dc or 4 to 20 mA output, selected via DIP switch
• Access to bank of 8 DIP switches through sealed cover for superior user
functionality
• Rugged encapsulated design for harsh environments
• Unique housing design allows for multiple mounting configurations
• Choose models with integral 2 m (6.5 ft) or 9 m (30 ft), or with Mini-style or
Euro-style quick-disconnect fitting
• Wide operating range of –20 °C to 70 °C (–4 °F to 158 °F)
• Temperature compensation
• Programmable for either positive or negative output slope
Models 1 Sensing Range Cable 2
Supply
Voltage
Output
QT50ULB
200 mm to 8 m (8 inches to
26 feet)
5-wire, 2 m (6.5 ft) cable
10 to 30 V dc
Selectable: 0 to 10 V dc or 4 to 20
mA
QT50ULBQ 5-pin Mini-style QD
QT50ULBQ6 5-pin Euro-style QD
WARNING: Not To Be Used for Personnel Protection
Never use this device as a sensing device for personnel protection. Doing so could lead to
serious injury or death. This device does not include the self-checking redundant circuitry necessary
to allow its use in personnel safety applications. A sensor failure or malfunction can cause either an
energized or de-energized sensor output condition.
Principles of Operation
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: D = ct ÷ 2
D = distance from the sensor to the target
c = speed of sound in air
t = transit time for the ultrasonic pulse
To improve accuracy, an ultrasonic sensor may average the results of several pulses before outputting a new value.
Temperature Effects
The speed of sound is dependent upon the composition, pressure and temperature of the gas in which it is traveling. For
most ultrasonic applications, the composition and pressure of the gas are relatively fixed, while the temperature may
fluctuate.
In air, the speed of sound varies with temperature according to the following approximation:
1 Information about discrete-output models is available on Banner’s website:
www.bannerengineering.com .
2 To order the 9 m cable models, add the suffix “w/30” to the model number of a cabled sensor (e.g., QT50ULB w/30). Models with
a QD connector require a mating cable.
U-GAGE QT50ULB Series Sensors with
Analog Output
Original Document
70137 Rev. B
4 April 2014
70137