MINI-BEAM
®
SM312D
Self-contained DC-operated Diffuse Mode Sensors
• Compact, modulated, self-contained diffuse proximity mode
sensors for 10-30V dc operation
• Range to 380 mm (15") (referenced to 90% reflectance
white test card)
• Switch-selectable for light operate or dark operate
• Includes Banner’s exclusive
AID™
alignment system*
• Highly repeatable 1 millisecond response
• Both sourcing and sinking outputs (150 mA max. each);
continuous overload and short-circuit protected
• Rugged, epoxy-encapsulated construction: meets NEMA
standards 1, 2, 3, 3S, 4, 4X, 6, 12 and 13; IEC IP67
• Physically and electrically interchangeable with 18 mm
barrel-type photoelectrics
*US patent number 4356393
Infrared, 880 nm
MINI-BEAM Diffuse Mode Models
Models
Range
Cable*
Supply
Voltage
Output
Type
1000
Excess Gain
Beam Pattern
Performance based on 90% reflectance white test card
SM312D
SM312D
SM312DQD
380 mm
(15")
2 m (6.5')
4-Pin Euro QD
10-30V dc
Bipolar
NPN/PNP
E
X
C
E
S
S
G
A
I
N
Diffuse Mode
100
15 mm
10 mm
5 mm
0
SM312D
Diffuse Mode
0.6 in
0.4 in
0.2 in
0
0.2 in
0.4 in
0.6 in
10
5 mm
10 mm
15 mm
1
1 mm
.04 in
0
10 mm
.4 in
100 mm
4 in
1000 mm
40 in
75 mm 150 mm 225 mm 300 mm 375 mm
3.0 in
6.0 in
9.0 in 12.0 in 15.0 in
DISTANCE
DISTANCE
*Notes:
i) 9 m (30') cables are available by adding suffix
“W/30”
to the model number of any cabled sensor (e.g.,
SM312D W/30).
ii) A 150 mm (6") long pigtail cable with attached QD connector is available by adding suffix
“QDP”
to the model number of any
MINI-BEAM sensor (e.g.,
SM312DQDP).
See page 5 for more information.
iii) A model with a QD connector requires an accessory mating cable. See page 8 for more information.
iv) May be ordered with 0.3 millisecond on/off response by adding suffix
“MHS”
to the model numbers
(e.g.,
SM312DMHS).
This modification reduces sensing range (and excess gain).
Printed in USA
05/01
P/N 03366 rev. D
MINI-BEAM
®
Sensors
SM312D
MINI-BEAM Installation and Alignment
Proper operation of the SM312D sensor requires that it be mounted securely and
aligned properly. Excessive movement or vibration can result in intermittent or false
operation caused by loss of alignment. For best results, final-mount the SM312D in
an 18mm-hole by its threaded barrel or use a mounting bracket (see page 6).
1) Begin with the sensor at the desired distance from the object to be sensed, and at the
approximate position where it will be mounted. The background should be as far
behind the object as possible (at least three times the distance of the sensor from the
object), and as dark a color as possible compared to the object. Ideally, the object
should present its largest reflective surface to the sensor.
2) Apply power to the sensor, and advance the 15-turn GAIN control to maximum
(clockwise end of rotation). The GAIN control is clutched at both ends to avoid
damage, and will “free-wheel” when either end point is reached.
If the sensor is “seeing” its reflected light, the sensor alignment LED should be “on”.
Move the sensor up-down-right-left (include angular rotation) to obtain the fastest
receiver LED pulse rate. If a pulse is not observable (too fast to count), reduce the
GAIN control (counterclockwise rotation) to obtain a countable pulse rate.
3) Repeat the alignment motions after each GAIN reduction. When you have found the
sensor orientation that produces the fastest pulse rate, mount the sensor solidly in
that position. Increase the receiver GAIN to maximum. Test the system by removing
the object from the sensing position. The receiver LED indicator should go “off”. If
the LED indicator does not go “off”, the sensor is reacting to light reflected from a
background surface. Reduce the GAIN setting until the alignment indicator goes “off”,
plus two additional full turns. Again place the object in the sensing position. If the
alignment indicator does not come “on”, the sensor is receiving as much or more
light energy from the background as from the object. Consider the following
alternatives:
a)
move the sensor closer to the object and reduce the sensitivity (GAIN);
“AID” Indicator LED Lights when the
sensor sees its own modulated
light and pulses at a rate proportional to the
strength of the received light signal.
Diffuse Mode Alignment
jec
t
Ob
SM312D
Up
Ri
gh
t
Le
ft
wn
Do
SM312D
15 Turn
Gain
Adjustment
and Light/Dark
Operate Switch*
Gasketed
Acrylic Cover
b) reduce background reflectivity by painting the background with flat-black
paint, or by scuffing the background or cutting a hole through it;
c)
tilt the sensor or the background so that the sensing beam is not
perpendicular to the background.
* Note regarding Light/Dark operate switch:
• Turn switch
fully
clockwise for light operate (sensor outputs conduct when sensing light is received)
• Turn switch
fully
counterclockwise for dark operate (sensor outputs conduct when sensing light is not received)
Banner Engineering Corp.
•
Minneapolis, U.S.A.
page
2
www.bannerengineering.com • Tel: 763.544.3164
MINI-BEAM
®
Sensors
SM312D
MINI-BEAM DC Sensor Specifications
Supply Voltage and Current
Supply Protection Circuitry
Output Configuration
Output Rating
10 to 30V dc (10% maximum ripple) at less than 25 mA (exclusive of load)
Protected against reverse polarity and transient voltages
Bipolar: One current sourcing (PNP) and one current sinking (NPN) open-collector transistor
150mA maximum each output at 25°C, derated to 100 mA at 70°C (derate
≈1
mA per °C)
Off-state leakage current
less than 1 microamp
Output saturation voltage
(PNP output) less than 1 volt at 10 mA and less than 2 volts at 150 mA
Output saturation voltage
(NPN output) less than 200 millivolts at 10 mA and less than 1 volt at 150 mA
Protected against false pulse on power-up and continuous overload or short-circuit of outputs
Sensors will respond to either a “light” or a “dark” signal of 1 millisecond or longer duration, 500 Hz max.
0.3 millisecond response modification is available. See note below.
100 millisecond delay on power-up: outputs are do not conduct during this time.
NOTE: DC MINI-BEAMs may be ordered with 0.3 millisecond on/off response by adding suffix “MHS” to the
model numbers (e.g. - SM312DMHS). This modification reduces sensing range (and excess gain).
Repeatability
Adjustments
0.3 milliseconds. Response time and repeatability specifications are independent of signal strength.
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 rear panel of sensor and
protected by a gasketed, clear acrylic cover.
Exclusive, patented Alignment Indicating Device system (AID
™
, US patent #4356393) lights a rear-panel
mounted red LED indicator whenever the sensor sees a "light" condition, with a superimposed pulse rate
proportional to the light signal strength (the stronger the signal, the faster the pulse rate).
Reinforced PBT thermoplastic polyester housing, totally encapsulated, o-ring sealing, acrylic lenses, and
stainless steel screws.
Meets NEMA standards 1, 2, 3, 3S, 4, 4X, 6, 12, and 13; IEC IP67
PVC-jacketed 4-conductor 2 m (6.5 ft) or 9 m (30 ft) cables, or 4-pin euro-style quick disconnect (QD)
fitting are available. QD cables are ordered separately. See page 8.
Temperature:
-20° to +70°C (-4° to +158°F)
Maximum relative humidity:
90% at 50°C (non-condensing)
The NPN (current sinking) output of dc MINI-BEAM sensors is directly compatible as an input to Banner
logic modules, including all non-amplified MAXI-AMP and MICRO-AMP modules. MINI-BEAMs are
TTL compatible.
Output Protection Circuitry
Output Response Time
Indicators
Construction
Environmental Rating
Connections
Operating Temperature
Application Notes
Certifications
Banner Engineering Corp.
•
Minneapolis, U.S.A.
www.bannerengineering.com • Tel: 763.544.3164
page
3
MINI-BEAM
®
Sensors
SM312D
MINI-BEAM DC Hookup Diagrams
DC Sensors with Attached Cable
bn
bu
wh
bk
Load
Load
DC Sensors with Quick Disconnect
(4-Pin Euro-Style)
bn
bu
wh
bk
Load
Load
+
10-30V dc
–
+
10-30V dc
–
4-Pin Euro-Style Pin-out
(Cable Connector Shown)
White Wire
Brown Wire
Blue Wire
Black Wire
Quick Disconnect (QD) Option
DC MINI-BEAM sensors are sold with either a 2 m (6.5') or
a 9 m (30') attached PVC-covered cable, or with a 4-pin
Euro-style QD cable fitting.
DC QD sensors are identified by the letters “QD” in their
model number suffix. For more information on mating QD
cables, see page 8.
MINI-BEAM Dimensions
MINI-BEAM DC Sensor with Integral Cable
3.2 mm (0.13 in)
30.7 mm
(1.21 in)
24.1 mm
(0.95 in)
12.2 mm (0.48 in)
MINI-BEAM DC Sensor with Quick-Disconnect
ø 3 mm Clearance (2)
M18 x 1 x 15 mm Thread
(Mounting Nut Supplied)
M12 x 1 Thread
Quick Disconnect
2 m (6.5 ft) Cable
Mounting Peg
(ø 6.3 mm x 2.5 mm)
19.1 mm (0.75 in)
20.0 mm
(0.79 in)
27.4 mm (1.08 in)
53.3 mm (2.10 in)
Banner Engineering Corp.
•
Minneapolis, U.S.A.
page
4
www.bannerengineering.com • Tel: 763.544.3164
MINI-BEAM
®
Sensors
SM312D
MINI-BEAM Modifications
Model Suffix
W/30
Modification
9 meter (30') cable
Description
All MINI-BEAM sensors may be ordered with an integral 9 m (30')
cable in place of the standard 2 m (6.5') cable
Standard dc MINI-BEAM sensors with 1 millisecond output response may
be modified for 0.3 millisecond (300 µs) response.
NOTE: Faster response comes at the expense of lower excess gain.
Also, operating temperature range becomes -20º to +50ºC (-4º to +122ºF)
All MINI-BEAMs may be built
with a 150 mm (6") long
integral cable which is
terminated with the
appropriate QD connector.
Example of Model
Number
SM312D W/30
MHS
Modified for High
Speed
SM312DMHS
QDP
Pigtail Quick
Disconnect
SM312DQDP
Replacement Lens Assemblies
MINI-BEAM lens assemblies are field-replaceable.
Right-Angle Reflectors
MINI-BEAM right-angle reflectors are useful for tight sensing
locations. NOTE: These reflectors significantly decrease excess gain.
Model
Description
Model
RAR-
300SM
Description
• Side mount reflector
• Profile dimension of 14 mm (0.56") in
the direction of the scan
• Front mount reflector that attaches
directly to the threaded barrel of most
MINI-BEAMs
• Profile dimension of 34 mm (1.35")
in the direction of the scan
UC-300L
Replacement lens for
SM312D
RAR-
300FM
Banner Engineering Corp.
•
Minneapolis, U.S.A.
www.bannerengineering.com • Tel: 763.544.3164
page
5
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