Banner Mini-Beam ac-Voltage User Manual

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MINI-BEAM

ac-Voltage Series

Installation

Self-contained photoelectric sensors

Additional information on this product is immediately available online at www.bannerengineering.com/69942

View or download additional information, including excess gain curves, beam patterns and accessories.

For further assistance, contact a Banner Engineering Applications Engineer at [phone] or [phone].

Sensing Mode Range LED Model*

Opposed Emitter

3 m (10')

Emitters with Attached Cable

All Other Cabled Models

Opposed Receiver SM2A31R

Opposed Emitter - Long

Range

Opposed Receiver - Long

Range

Opposed Emitter

Clear Plastic Detection

Opposed Receiver

Clear Plastic Detection

Non-Polarized

Retroreflective

Polarized

Retroreflective

Extended-Range

Polarized Retroreflective

Diffuse

Divergent Diffuse

30 m (100')

0 to 300 mm (0 to 12")

Actual range varies,

depending upon the light

transmission properties

of the plastic material

being sensed.

5 m (15')

50 mm to 2 m

(2" to 7')

10 mm to 3 m

(0.4" to 10')

380 mm (15")

300 mm (12")

130 mm (5")

Infrared
880 nm

Visible Red

650 nm

Infrared
880 nm

Guide

SMA31E

SMA31EL

SM2A31RL

SMA31EPD

SM2A31RPD

SM2A312LV

SM2A312LVAG

SM2A312LP

SM2A312D

SM2A312DBZ

SM2A312W

SM2A312C

SM2A312C2

SM2A312CV

SM2A312CV2

Emitters with Quick Disconnect

Convergent

16 mm (0.65") Focus

43 mm (1.7") Focus

16 mm (0.65") Focus

43 mm (1.7") Focus

Infrared
880 nm

Visible Red

650 nm

(3-Pin Micro-Style)

Visible

Green

625 nm

Infrared
880 nm

Visible Red

650 nm

All Other Models

with Quick Disconnect

(3-Pin Micro-Style)

16 mm (0.65") Focus

Glass Fiber Optic

Plastic Fiber Optic SM2A312FP

* Standard 2 m (6.5') cable models are listed.

• 9 m (30') cable: add suffix “W/30” (e.g., SMA31E W/30).

• 3-pin Micro-style QD models: add suffix “QD” (e.g., SMA31EQD).

WARNING . . .

Not To Be Used for Personnel Protection

Range varies, depending

on sensing mode and

fiber optics used.

Never use these products as sensing devices for personnel protection. Doing so

NOTE: Output Type for all models is SPST

Solid-State 2-Wire.

to allow their use in personnel safety applications. A sensor failure or malfunction can cause

could lead to serious injury or death.

These sensors do NOT include the self-checking redundant circuitry necessary

either an energized or de-energized sensor output condition. Consult your current Banner Safety
Products catalog for safety products which meet OSHA, ANSI and IEC standards for personnel
protection.

Printed in USA 03/04 P/N 69942 rev. A

SM2A312CVG

SM2A312F

SM2A312FV

®

Gain (Sensitivity) Adjustment Screw

Alignment Indicator Device (AID)*

Light/Dark Operate Select Switch

Clockwise: Light Operate
(outputs conduct when sensing
light is received).

Counterclockwise: Dark Operate
(outputs conduct when sensing
light is not received).

*U.S. Patent no. 4356393

12.2 mm (0.48")

Mounting Peg

(ø 6.3 mm x 2.5 mm)

ø 3 mm Clearance (2)

M18 x 1 x 15 mm Thread
(Mounting Nut Supplied)

3.2 mm
(0.13")

27.4 mm (1.08")

30.7 mm
(1.21")

24.1 mm
(0.95")

19.1 mm
(0.75")

66.0 mm
(2.60")

2 m (6.5') Cable

Bezel

18.0 mm
(0.71")

51.8 mm
(2.04")

13.2 mm (0.52")

M18 x 1 x 19 mm Thread
(Mounting Nut Supplied)

Fiber Optic Fitting

69.9 mm
(2.75")

31.2 mm (1.23"

)

54.8 mm
(2.16")

Fiber
Optic
Fitting

22.3 mm
(0.88")

16.2 mm
(0.64")

20.0 mm
(0.79")

12 mm Thread

Quick-disconnect

MINI-BEAM

ac-Voltage Series

Models with suffixes E, EL, EPD, R, RL, RPD, LV,
LVAG, LP, D, C, C2, CV, CV2, and CVG

Dimensions

Models with suffix DBZ and W

Installation

Guide

Models with suffix FP

Models with suffix F and FV

2 P/N 69942 rev. A

(shown with gasketed acrylic cover removed)

Sensor Features

QD Models

NOTES:

• Please observe proper ESD precautions
(grounding) when adjusting Gain pot or
LO/DO switch.

• When turning the Light/Dark Operate Select
switch, be careful not to damage the small
tabs on the switch.

Banner Engineering Corp. • Minneapolis, MN U.S.A.

www.bannerengineering.com • Tel: [phone]

Installation

Object

Lo

w

Reflectivity
Backgr

ound

Retr

o

Ta

rg

et

Object

Object

Guide

Sensor Mounting and Alignment

MINI-BEAM sensors perform most reliably if they are properly aligned and securely
mounted. For maximum mechanical stability, final-mount MINI-BEAM sensors
through 18 mm diameter holes by their threaded barrel (where available), or use
a mounting bracket. A complete selection of mounting brackets is available. Visit
www.bannerengineering.com/69942, or contact the factory for information on
mounting options.

Begin with line-of-sight positioning of the MINI-BEAM sensor to its emitter
(opposed-mode sensing) or to its target (all other sensing modes). When using a
retroreflective sensor, the target is the retroreflector (“retro target”). For diffuse or
convergent sensing modes, the target is the object to be detected.

Apply power to the sensor (and to the emitter, if using the opposed mode).
Advance the 15-turn Gain control to maximum (clockwise end of rotation), using
a small flat-blade screwdriver. The Gain control is clutched at both ends to avoid
damage, and will “free-wheel” when either endpoint is reached. See Sensor
Features illustration on page 2.

Alignment Tips

®

MINI-BEAM

If the MINI-BEAM sensor is receiving its light signal, the red LED Alignment
indicator will be ON and flashing at a rate proportional to the signal strength
(faster = more signal). Move the sensor (or move the retro target, if applicable)
up-down-right-left (including angular rotation) to find the center of the movement
zone within which the LED indicator remains ON. Reducing the Gain setting will
reduce the size of the movement zone, and enable more precise alignment.

Repeat the alignment motions after each Gain reduction. When optimum
alignment is acheived, mount sensor(s) (and the retro target, if applicable) solidly
in that position. Increase the Gain to maximum.

Test the sensor by placing the object to be detected in the sensing position, then
removing it. The Alignment indicator LED should come ON when the sensing beam
is established (Light condition), and go OFF when the beam is broken (Dark
condition). If the Alignment indicator LED stays ON for both sensing conditions,
consider the following tips for each sensing mode.

ac-Voltage Series

Opposed-Mode Alignment

Light condition: no object in beam
Dark condition: object in beam

Emitter

Receiver

“Flooding” occurs when a portion of
the sensing beam passes around the object to
be sensed. “Burn-through” occurs when a portion
of the emitter’s light energy passes through a thin or
translucent object, and is sensed by the receiver.

To correct either problem, do one or more of the following to
reduce the light energy:

• Reduce the Gain adjustment on the receiver.

• Add an aperture to one or both lenses. (MINI-BEAM apertures, available from
Banner, fit neatly inside the lens assembly.)

• Intentionally misalign the emitter and receiver.

Retroreflective-Mode
Alignment

Light condition: no object in beam
Dark condition: object in beam

Diffuse-Mode Alignment

Light condition: object in beam

Dark condition: no object in beam

If the Alignment LED does not go
OFF when the object is removed
from the beam, the sensor is probably
detecting light reflected from some
background object. To remedy this problem:

• Reduce the reflectivity of the background by painting the
surface(s) flat-black, scuffing any shiny surface, or
drilling a large hole, directly opposite the diffuse sensor.

• Move the sensor closer to the object to be detected and reduce the Gain

adjustment. Rule of thumb for diffuse sensing: The distance to the nearest
background object should be at least three times the sensing distance.

Convergent-Mode Alignment

Light condition: object in beam

Dark condition: no object in beam

A highly reflective
object may reflect enough light
back to a retroreflective sensor to allow
that object to slip through the beam,
without being detected. This problem is called
“proxing,” and the following methods may be
used to correct it:

• Position the sensor and retro target so the beam will not
strike a shiny surface perpendicular to the sensor lens.

• Reduce the Gain adjustment.

• Add a polarizing filter (for model SM2A312LV).

Banner Engineering Corp. • Minneapolis, MN U.S.A.

www.bannerengineering.com • Tel: [phone]

The sensing energy of a convergent-mode
sensor is concentrated at the specified focus
point (see page 1). Convergent-mode sensors are
less sensitive to background reflections, compared with
diffuse-mode sensors. However, if background reflections
are a problem:

• Skew the sensor position at a 10° to 25° angle to eliminate direct
reflections from shiny background surfaces.

• Reduce the reflectivity of the background by painting the surface(s)
flat-black, scuffing any shiny surface, or drilling a large hole, directly
opposite the sensor.

• Reduce the Gain adjustment.

P/N 69942 rev. A 3

®

Trimmed fiber
control ends

Plastic fiber

emitter port

Plastic fiber
receiver port

Gripper
Unlock

Lock

Adapters for

0.25- and 0.5-mm fibers

Sensor Face

O-ring

Retaining Clip

MINI-BEAM

ac-Voltage Series

Installation

Guide

Fiber Installation

Glass Fiber Installation

1) Install the O-ring (supplied with the fiber) on each fiber end, as shown in the
drawing.

2) While pressing the fiber ends firmly into the ports on the sensor front, slide the
U-shaped retaining clip (supplied with the sensor) into the slot in the
sensor’s barrel, until it snaps into place.

Specifications

Supply Voltage and Current

24 to 240V ac (50/60 Hz), 250V ac maximum
Supply Protection Circuitry

Protected against transient voltages
Output Configuration

SPST SCR solid-state relay with either normally closed or normally open contact (“light/
dark operate” selectable); 2-wire hookup

Output Rating
Minimum load current 5 mA; maximum steady-state load capability 300 mA to 50°C
ambient (122°F) 100 mA to 70°C ambient (158°F)

Inrush capability: 3 amps for 1 second (non repetitive); 10 amps for 1 cycle (non
repetitive)

OFF-state leakage current: less than 1.7 mA rms
ON-state voltage drop: ≤ 5 volts at 300 mA load, ≤ 10 volts at 15 mA load

Output Protection Circuitry

Protected against false pulse on power-up
Output Response Time

Opposed: 2 millisecond on and 1 millisecond off;
Non-Polarized and Polarized Retro, Convergent, and Plastic Fiber Optic:
4 milliseconds on and off;
Diffuse and Glass Fiber Optic: 8 milliseconds on and off.
OFF response time specification does not include load response of up to 1/2 ac cycle (8.3
milliseconds). Response time specification of load should be considered when important.
(NOTE: 300 millisecond delay on power-up.)

Repeatability
Opposed: 0.3 milliseconds;
Non-Polarized and Polarized Retro, Convergent, and Plastic Fiber Optic:

1.3 milliseconds;
Diffuse and Glass Fiber Optic: 2.6 milliseconds.

Response time and repeatability specifications are independent of signal strength.

Plastic Fiber Installation

1) With supplied fiber cutter, make a clean cut at control ends of fibers.

2) Unlock the fiber gripper as shown below. Apply appropriate fiber adaptors
prior to fiber insertion, if needed.

3) Gently insert the prepared fiber ends into the ports, as far as they will go.

4) Slide the fiber gripper back to lock, as shown below.

Adjustments
Light/Dark Operate Select switch, and 15-turn slotted brass screw Gain (sensitivity)
adjustment potentiometer (clutched at both ends of travel). Both controls are located on the
rear panel of the sensor and are protected by a gasketed, clear acrylic cover (see page 2).

Indicators

Red indicator LED on rear of sensor is ON when the load is energized.

Construction

Reinforced thermoplastic polyester housing, totally encapsulated, o-ring sealing, acrylic
lenses, stainless steel screws

Environmental Rating
Meets NEMA standards 1, 2, 3, 3S, 4, 4X, 6, 12, and 13; IEC IP67.

Connections
PVC-jacketed 2-conductor 2 m (6.5') or 9 m (30') cables, or 3-pin Micro-style QD fitting;
QD cables available separately.

Operating Conditions
Temperature: -20° to +70°C (-4° to +158°F)
Maximum relative humidity: 90% at 50°C (non-condensing)

Application Notes

• Overload conditions can destroy ac MINI-BEAM sensors. Directly wiring sensor
without load series, across hot and neutral will damage sensor (except emitter models).

• Low-voltage use requires careful analysis of the load to determine if the sensor’s

leakage current or on-state voltage will interfere with proper operation of the load.

• The false-pulse protection feature may cause momentary drop-out of the load

when the sensor is wired in series or parallel with mechanical switch contacts.

Certifications

Additional information on this product is immediately available online at www.bannerengineering.com/69942

View or download additional information, including excess gain curves, beam patterns and accessories.

For further assistance, contact a Banner Engineering Applications Engineer at [phone] or [phone].

P/N 69942 rev. A

Banner Engineering Corp., 9714 Tenth Ave. No., Minneapolis, MN 55441 • Phone: [phone] • www.bannerengineering.com • Email: [e-mail]

WARRANTY: Banner Engineering Corp. warrants its products to be free from defects for one year.
Banner Engineering Corp. will repair or replace, free of charge, any product of its manufacture found to
be defective at the time it is returned to the factory during the warranty period. This warranty does not
cover damage or liability for the improper application of Banner products. This warranty is in lieu of any
other warranty either expressed or implied.