Banner OMNI-BEAM Series - Manual

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Analog OMNI-BEAM ™ Sensors
with Voltage Sourcing Outputs
Proven OMNI-BEAM optical performance in sensors
with analog voltage sourcing outputs
Ideal for applications requiring a continuously variable
control voltage that is either directly or inversely related
to a sensing parameter; "mirror-image" outputs
Analog output is ripple-free and temperature-stable
Non-interactive NULL and SPAN controls for ease of
adjustment
Built-in 10-element LED display indicates output voltage
Models available for diffuse, convergent, and fiber optic
sensing modes, and for ac or dc supply voltages
Banner Analog OMNI-BEAM™ Sensors combine the proven optical
performance of standard OMNI-BEAM™ sensors with a 0 to 10V dc
or 10 to 0V dc sourcing analog output power block to produce a highly
versatile and practical analog photoelectric control. Analog photo-
electric sensors are especially useful in applications such as process
control, where it is necessary to monitor an object's position or size to
produce a variable control voltage for an analog device such as a motor
speed control. Analog photoelectric sensors are also used to monitor
the optical reflectivity or optical clarity of materials.
Analog OMNI-BEAM sensors provide a variable dc voltage output
that is either directly related ("non-inverting" output) or inversely
related ("inverting" output) to the strength of the received light signal.
When properly adjusted, the two analog outputs are mirror-images of
each other, with their output voltage plots intersecting at 5 volts (see
page 3). Each sensor has multi-turn NULL and SPAN controls to set
the minimum and maximum limits of the sensor's sourcing voltage
outputs. An innovative, custom-designed analog sensor circuit design
allows NULL and SPAN to be adjusted without interaction, greatly
simplifying the setup adjustment procedure. A convenient 10-element
moving-dot LED array gives a visual indication of relative light signal
change and power block voltage output to within the nearest volt.
Analog OMNI-BEAM sensors consist of two basic "building blocks":
a sensor head and a power block. The sensor head contains optical
components, an analog amplifier, NULL and SPAN adjustment con-
trols, and LED indicator array circuitry. Sensor heads are available for
diffuse, convergent, and fiber optic sensing modes. Fiber optic mode
models include infrared and visible-light glass fiber optic models, and
a visible-light plastic fiber optic model. The power block contains
power supply and analog voltage output circuits, and is offered in
three basic models: model OPBT3 (for +15 to 30V dc), model OPBA3
(for 105 to 130V ac), and model OPBB3 (for 210 to 250V ac). Power
block models are listed in the table on page 2.
Power blocks are available with either an attached 6-foot PVC-
covered cable or an integral QD (Quick-disconnect) connector. Twelve-
foot lengths of mating minifast
™ quick-disconnect cable are sold
separately.
To order an Analog OMNI-BEAM sensor, specify the following:
1) a sensor head model (from pages 3, 4, and 5), and
2) a power block model (from page 2).
The sensor head module and the power block module
are sold separately.
Shown are models
OASBD (l) and
OASBFP with
coiled plastic
fiber optic
assembly (r);
shown with
OPBT3QD
QD-style dc
power blocks.
Dimensions
P/N 03579A4C Printed in USA
A comprehensive introduction to the theory and use of
photoelectric analog sensors begins on page 5.
Power requirements:
+15 to 30V dc, OPBT3 power block models
105 to 130V ac (50/60Hz), OPBA3 power block models
210 to 250V ac (50/60Hz), OPBB3 power block models
Sensing range: see individual sensor head specifications
Output:
The output is an analog voltage that is related to the intensity of the
light reaching the receiver.
The relationship between the 0 to 10V dc analog output voltage and
the received light signal intensity is determined by the wiring
configuration, and may be either direct or inverse.
Output capacity 10mA, maximum. Both outputs may be used
simultaneously, but the maximum total load may not exceed
10mA. Outputs are protected against short-circuit and overload.
Specifications
(Specifications are continued on page 2)
Please read Personnel Safety WARNING, page 8.
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