OPBT2 BANNER ENGINEERING, OPBT2 Datasheet

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

Current page: 1 of 2
Download datasheet (166Kb)

Printed in USA

OMNI-BEAM

•

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 ...

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