OPBT2 BANNER ENGINEERING, OPBT2 Datasheet
![POWER BLOCK](/photos/19/84/198477/4616933_sml.jpg)
OPBT2
Manufacturer Part Number
OPBT2
Description
POWER BLOCK
Manufacturer
BANNER ENGINEERING
Type
Power Blockr
Datasheet
1.OPBT2.pdf
(2 pages)
Specifications of OPBT2
For Use With
OMNI-BEAM Sensors
Printed in USA
OMNI-BEAM
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The OMNI-BEAM™ model OSBFAC is a special-purpose ac-coupled
fiber optic sensor head module. It is intended for applications in which
the light signal change is so small that sensitivity adjustment of ordinary
dc-coupled sensors is difficult or impossible. The OSBFAC responds to
even smaller signal changes than do standard fiber optic OMNI-BEAM
sensors set for LOW hysteresis, and is less affected by gradual signal
changes due to dirt buildup, etc. Typical applications include thread
break detection, web flaw detection, and detection of small parts falling
randomly from vibratory feeders or small presses.
Many such low-contrast photoelectric sensing applications present prob-
lems to dc-coupled sensors because of switching hysteresis. Switching
hysteresis is a designed-in property of dc-coupled sensors that causes the
"turn-on" point of the sensor's dc-coupled amplifier to be slightly differ-
ent than the "turn-off" point. Its purpose is to prevent "indecision" and
erratic operation of the sensor's output circuit when the light signal is at
or near the switching point of the dc-coupled amplifier.
The OSBFAC, with its ac-coupled amplifier, reliably amplifies the small
signal changes found in many low-contrast sensing applications. An
automatic gain control (AGC) feedback system locks onto the light signal
and continually adjusts the light intensity of the emitter so that the system
is always maintained at exactly the desired reference level regardless of
the sensing range or degree of environmental contamination. A multi-
turn GAIN control enables setting of the amplifier sensitivity.
Instead of the D.A.T.A.™ array of other OSB Series sensor heads, the
OSBFAC has a LOCK indicator LED that lights when the AGC circuit
has locked onto the signal, and a LOAD indicator LED that lights
whenever the sensor's output circuit is energized. Both LEDs are easily
visible beneath the OSBFAC's transparent LEXAN
A slide switch inside the base of the OSBFAC sensor head selects either
light- or dark-operate. When light operate is selected, output occurs on
a dark-to-light transition. When dark-operate is selected, output occurs
on a light-to-dark transition. The OSBFAC requires use of the model
OLM8 or OLM8M1 slide-in logic module. Sensor head output is in the
form of a quick pulse, and an OLM8 Series module is used to condition
this pulse to the desired length. See data sheet P/N 03522 or 03533 or the
Banner product catalog for further information on these logic modules.
The OSBFAC ac-coupled fiber optic sensor head may be used with any
of the following OMNI-BEAM power block models: OPBT2 and
OPBT2QD (powered by 10 to 30V dc); OPBA2 and OPBA2QD
Highly sensitive to very small signal changes
Automatic Gain Control circuit continually adjusts
emitter light output to maintain system gain
Ideal for low contrast applications such as web flaw
and thread break detection, falling parts detection
Selectable light-operate or dark-operate; no false
pulse on power-up
Use with standard OMNI-BEAM ac or dc power
blocks and model OLM8 logic module
™
®
top cover.
Model
AC-coupled
Fiber Optic Sensor Head
OSBFAC
(powered by 105 to 130V ac);
(powered by 210 to 250V ac). Power blocks are available either
with standard 6-foot long attached PVC cable, or with an integral
male quick-disconnect (QD) connector (mating QD cable is pur-
chased separately). Information on power blocks and mating
quick-disconnect cables may be found in the Banner product
catalog.
Basic hookup information is given on page 2. Complete power
block hookup information may be found on the data sheet that
accompanies each power block, or in the Banner product catalog.
Model OSBFAC with power block and rectangular fiber
optics attached.
Sensing modes and ranges*, model OSBFAC
Opposed: 1/16-inch fibers, no lenses
Opposed: 1/8-inch fibers, no lenses
Opposed: 1/8-inch fibers, L9 lenses
Opposed: 1/8-inch fibers, L16F lenses
Diffuse: 1/8-inch fiber, no lens
Retro: 1/8-inch fiber, L9 lens, BRT-3 target
*Minimum guaranteed ranges
**Distance to white test card
Never use this product as a sensing device for personnel protection.
Its use as a safety device may create an unsafe condition which could
lead to serious injury or death.
Only MACHINE-GUARD and PERIMETER-GUARD Systems,
and other systems so designated, are designed to meet OSHA and
ANSI machine safety standards for point-of-operation guarding
devices. No other Banner sensors or controls are designed to meet
these standards, and they must NOT be used as sensing devices for
personnel protection.
!
WARNING
ence sensor does NOT include the self-check-
ing redundant circuitry necessary to allow its
use in personnel safety applications. A sensor
failure or malfunction can result in either an
energized or a de-energized sensor output con-
dition.
or OPBB2 and OPBB2QD
This photoelectric pres-
3.5 inches
7.0 inches
5.3 feet
17.8 feet
0.6 inches**
2.3 feet
P/N 03553D4B
Related parts for OPBT2
OPBT2 Summary of contents
Page 1
... See data sheet P/N 03522 or 03533 or the Banner product catalog for further information on these logic modules. The OSBFAC ac-coupled fiber optic sensor head may be used with any of the following OMNI-BEAM power block models: OPBT2 and OPBT2QD (powered 30V dc); OPBA2 and OPBA2QD Printed in USA OSBFAC Model ™ ...
Page 2
... LOAD output. The ALARM output is capable of switching up to 200mA, maximum. max. (for ac-powered power blocks). Also note that, when dc-powered power blocks (OPBT2 and OPBT2QD) are used with the OSBFAC, they are not short-circuit protected. Telephone 612/544-3164 Light/Dark Operate ...