MULTI-BEAM®
Printed in USA
Hookup Information
Functional Schematic, LS4 Light Screen Systems
P/N 39673
LS4EL/RL Light Screen Systems offer a simple, economical, but highly
reliable means of sensing objects moving at high speed through an area (or
"window"). Each system consists of two self-contained units: an emitter and
a receiver. Emitters contain four infrared light sources aligned in a row and
strobed (turned "on" one at a time) in a specific sequence and at a high
frequency. Receivers contain a matching array of phototransistors. The
height of the array is 3.5 inches (90 mm). The LS4RL receiver may be placed
18 to 90 inches (45,7 to 228,6 cm) opposed from the LS4EL emitter. This
produces a "curtain" of light 5 to 6 inches high and as wide as the separation
distance between the emitter and receiver.
The smallest object that can be detected depends upon the location of the
object within the curtain. Midway between emitter and receiver, an object 1
inch (25 mm) or larger in cross section can be detected anywhere within a 5
inch (127 mm) high window. Near the emitter or receiver, an object of 1.5
inches (38 mm) or larger in cross section can be detected anywhere within a
6 inch (152 mm) high window.
The light from the emitter is modulated to minimize sensitivity of the system
to ambient light. An indicator LED on the emitter lights whenever power is
applied. The receiver has an alignment LED which lights whenever the beam
is broken. Models are available with either attached cable or integral quick
disconnect (QD) fitting. The receiver output interfaces directly with dc loads
or circuits up to 30V dc, and offers both sinking (NPN) and sourcing (PNP)
output transistors. Outputs are energized continuously while the beam is
broken. A 5 millisecond pulse stretcher (OFF delay) is included to improve
interfacing reliability.
View of connector on sensor (male pins)
Pin #1 (Black): sourcing output (receiver only)
Pin #2 (Blue): common (dc neg.) (emitter and receiver)
Pin #3 (Brown): +10 to 30V dc (emitter and receiver)
Pin #4 (White): sinking output (receiver only)
NOTE: Emitters have no connection to pins #1 and #4.
Quick disconnect model emitter and receiver both use Banner mini-type mating
cable model MBCC-412 (p/n 25226, length 12 feet). Model MBCC-430 is also
available (p/n 29951, length 30 feet). Order cable separately.
Specifications
MODELS: One receiver and one emitter per system.
LS4EL (p/n 39679), emitter, 6-1/2 foot (2 m) cable
LS4RL (p/n 39680), recevier, 6-1/2 foot (2 m) cable
LS4ELQ (p/n 38429), emitter, 4-pin mini-style QD
LS4RLQ (p/n 38430), receiver, 4-pin mini-style QD
Use either emitter with either receiver.
SUPPLY VOLTAGE: 10 to 30 V dc at 35mA (for
LS4EL(Q) and 25 mA for LS4RL(Q), exclusive of load.
OUTPUT CONFIGURATION: one current sinking
(NPN) and one current sourcing (PNP) open collector
transistor.
OUTPUT RATING: 125mA continuous, either output.
OUTPUT PROTECTION: short-circuit and reverse-
polarity protected.
RANGE: 18 to 90 inches (45,7 to 228,6 cm).
RESOLUTION: 1 inch to 1.5 inches, depending upon the
location of the object within the curtain (see text, above).
RESPONSE TIME: 1 millisecond. Successive parts must
have at least 10 milliseconds separation.
CONSTRUCTION: reinforced VALOX® housing; acrylic
lens. Lens fully gasketed. NEMA 1, 2, 3, 12, and 13.
Stainless steel hardware.
CABLING: 6-1/2 foot (2 m) attached cable or 4-pin mini-
style quick disconnect fitting. See model listing (above).
OPERATING TEMPERATURE RANGE:
0 to 50 degrees C (32 to 122 degrees F).
LS4EL/RL
Light Scr een Systems
Rev. A
May 2013
Banner Engineering Corp. 9714 10th Avenue No., Minneapolis, MN 55441 Telephone: (612) 544-3164 FAX (applications): (612) 544-3573
WARRANTY: Banner Engineering Corporation warrants its products to be free from defects for one year. Banner Engineering Corporation 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.
Installation and Alignment
The reliable performance of Light Screen Systems requires careful alignment and secure
mounting. The model SMBLS 2-part, 3-axis mounting bracket (shown below) is highly
recommended. Solid mounting is important. Mounting locations should be as free from
vibration as possible. If vibration is unavoidable, allow the emitter and receiver to
vibrate together: no high-amplitude differential vibration is allowed.
Mount the emitter and receiver facing each other at their operating locations. Their faces
(front panels) should be exactly parallel and opposite each other. The line of transmitter
LEDs should be exactly parallel with and opposite to the line of receiver phototransistors.
This constitutes optimal mechanical alignment.
Optimum mechanical alignment does not always result in optimum optical alignment.
When optical alignment is optimum, the receiver status indicator (on the front of the
receiver) will be "off" and remain "off" with a moderate level of vibration at either the
emitter or the receiver.
Beginning with optimum mechanical alignment, adjust for optimum optical alignment
as described in steps #1 through #5. The procedure assumes use of the SMBLS mounting
bracket shown in the drawings below.
1) Loosen the two bolts holding the two parts of the bracket together just enough to
allow the upper ("carriage") bracket along with the emitter to be rotated about the
emitter's vertical axis. Also, slightly loosen the mounting bolts in the curved slots of the
"base" bracket, which will allow the SMBLS bracket to be tipped "side-to-side".
2) With power applied to both units, "tip" the entire SMBLS bracket slightly from
side to side. Find the extremes of movement between which the receiver's red indicator
LED remains "off". Secure the base bracket at the point midway between the extremes.
3) Rotate the carriage bracket (to which the emitter is attached) slightly in both directions about the emitter's vertical axis. Find the extremes of
bracket rotation between which the receiver's red indicator LED remains "off". Secure the emitter midway between the extremes by tightening the
two bolts that lock the two parts of the SMBLS bracket together.
4) Loosen the two mounting bolts that hold the emitter to the carriage bracket. Slide the emitter up and down vertically in the bracket, noting the
extremes between which the receiver's red LED indicator remains "off". Tighten the bolts to secure the emitter midway between the extremes. (Note:
If the initial mechanical alignment was inadequate, it may be necessary to repeatedly alternate tipping, rotating, and sliding movements before optimal
optical alignment can be attained.)
5) Perform step #3 again, this time using the receiver unit and it's bracket.
6) Check for proper alignment by breaking one or more of the beams. The receiver indicator LED and outputs should come "on" when one or more
beams are broken. Tighten all mounting hardware securely in position.
Dimensions,
LS4 Light Screen Systems
Model SMBLS Accessory Mounting Bracket
Model SMBLS is an accessory two-part
bracket assembly that allows adjustment in
three directions. It consists of two 11-gauge
zinc-plated steel right-angle brackets that fas-
ten together so that they rotate relative to each
other.
The light screen sensor attaches to the upper
("carriage") bracket. Slots are provided for
vertical adjustment.
The SMBLS must be ordered separately from
the light screen sensors.
WARNING These photoelectric presence sensors do NOT include the self-checking redundant circuitry necessary to allow their use in
personnel safety applications. A sensor failure or malfunction can result in either an energized or a de-energized sensor output condition.
Never use these products as sensing devices for personnel protection. Their use as safety devices 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.
!
(763) 544-3164
www.bannerengineering.com
Banner Engineering Corp Limited Warranty
Banner Engineering Corp., 9714 Tenth Ave. No., Minneapolis, MN 55441 • Phone: 763.544.3164 • www.bannerengineering.com • Email: sensors@bannerengineering.com
P/N 39673 Rev. A
Banner Engineering Corp. warrants its products to be free from defects in material and workmanship for one year
following the date of shipment. Banner Engineering Corp. will repair or replace, free of charge, any product of its
manufacture which, at the time it is returned to the factory, is found to have been defective during the warranty
period.This warranty does not cover damage or liability for misuse, abuse, or the improper application or installation of
the Banner product.
THIS LIMITED WARRANTY IS EXCLUSIVE AND IN LIEU OF ALL OTHER WARRANTIES WHETHER EXPRESS OR
IMPLIED (INCLUDING, WITHOUT LIMITATION, ANY WARRANTY OF MERCHANTABILITY OR FITNESS FOR A
PARTICULAR PURPOSE), AND WHETHER ARISING UNDER COURSE OF PERFORMANCE, COURSE OF DEAL-
ING OR TRADE USAGE.
This Warranty is exclusive and limited to repair or, at the discretion of Banner Engineering Corp., replacement. IN NO
EVENT SHALL BANNER ENGINEERING CORP. BE LIABLE TO BUYER OR ANY OTHER PERSON OR ENTITY FOR
ANY EXTRA COSTS, EXPENSES, LOSSES, LOSS OF PROFITS, OR ANY INCIDENTAL, CONSEQUENTIAL OR
SPECIAL DAMAGES RESULTING FROM ANY PRODUCT DEFECT OR FROM THE USE OR INABILITY TO USE
THE PRODUCT, WHETHER ARISING IN CONTRACT OR WARRANTY, STATUTE, TORT, STRICT LIABILITY,
NEGLIGENCE, OR OTHERWISE.
Banner Engineering Corp. reserves the right to change, modify or improve the design of the product without assuming
any obligations or liabilities relating to any product previously manufactured by Banner Engineering Corp.
