MINI-BEAM
®
DC Voltage Series Sensor
Datasheet
Self-contained photoelectric sensors
•
•
•
•
10 to 30 V DC with bipolar NPN/PNP outputs
Signal strength or output indicator
2 m or 9 m integral cable, or Euro-style quick-disconnect fitting
18 mm threaded lens mount on some models
WARNING:
• Do not use this device for personnel protection
• Using this device for personnel protection could result in serious injury or death.
• This device does not include the self-checking redundant circuitry necessary to allow its use in
personnel safety applications. A device failure or malfunction can cause either an energized (on) or de-
energized (off) output condition.
Models
Integral 2 m (6.5 ft) unterminated cable models are listed.
• To order the 9 m (30 ft) PVC cable model, add the suffix "W/30" to the cabled model number. For example, SM31EW/30.
• To order the 4-pin M12/Euro-style QD models, add the suffix “QD” to the model number. For example, SM31EQD.
• To order the 150 mm (6 in) cable with QD, add the suffix “QDP” to the model number. For example, SM31EQDP.
• To order a 0.3 ms response time model, add the suffix “MHS” to the model number. For example, SM31EMHS.
Sensing Mode
Opposed Emitter
Opposed Receiver
OPPOSED
Range
3 m (10 ft)
LED
Model
SM31E
Opposed Emitter - Long Range
Opposed Receiver - Long Range
Opposed Emitter - Clear Plastic Detection
Opposed Receiver - Clear Plastic Detection
Infrared, 880 nm
30 m (100 ft)
0 to 300 mm (0 to 12 in) Actual range varies,
depending on the light transmission
properties of the plastic material being
sensed.
SM31R
SM31EL
SM31RL
SM31EPD
SM31RPD
OPPOSED
Non-Polarized Retroreflective
RETRO
5 m (15 ft)
Visible red, 650 nm
SM312LV
Polarized Retroreflective
55 mm to 2 m (2 in to 7 ft)
10 mm to 3 m (0.4 in to 10 ft)
380 mm (15 in)
300 mm (12 in)
130 mm (5 in)
16 mm (0.65 in) Focus
Infrared, 880 nm
SM312LVAG
SM312LP
SM312D
SM312DBZ
SM312W
SM312C
SM312C2
P
POLAR RETRO
Extended-Range Polarized Retroreflective
Diffuse
DIFFUSE
Divergent Diffuse
Convergent
CONVERGENT
43 mm (1.7 in) Focus
Original Document
69943 Rev. G
8 September 2020
69943
MINI-BEAM
®
DC Voltage Series Sensor
Sensing Mode
Range
16 mm (0.65 in) Focus
43 mm (1.7 in) Focus
16 mm (0.65 in) Focus
49 mm (1.9 in) Focus
16 mm (0.65 in) Focus
49 mm (1.9 in) Focus
LED
Model
SM312CV
Visible red, 650 nm
CONVERGENT
SM312CV2
SM312CVB
Visible blue, 475 nm
CONVERGENT
SM312CV2B
SM312CVG
Visible green, 525 nm
CONVERGENT
SM312CV2G
SM312F
SM312FV
SM312FVB
SM312FVG
SM312FP
SM312FPB
SM312FPG
SM312FPH
Infrared, 880 nm
Glass Fiber Optic
GLASS FIBER
Visible red, 650 nm
Visible blue, 475 nm
Visible green, 525 nm
Range varies, depending on sensing mode
and fiber optics used.
Visible red, 650 nm
Visible blue, 475 nm
Visible green, 525 nm
Plastic Fiber Optic
PLASTIC FIBER
Special High-Power Option Plastic Fiber
Optic
Visible red, 650 nm
Overview
1. Adjustment Indicator Device (AID)
2. Gain (sensitivity) adjustment screw
3. Light/dark operate select switch
1
2
3
Adjust clockwise for light operate (outputs conduct when sensing light is
received) and counterclockwise for dark operate (outputs conduct when
sensing light is not received).
Wiring Diagrams
Emitters with Attached Cable
All Other Models with Attached Cable
bn
bn
bu
+
bu
wh
bk
Load
Load
10-30V dc
–
+
10-30V dc
–
2
www.bannerengineering.com - Tel: + 1 888 373 6767
P/N 69943 Rev. G
MINI-BEAM
®
DC Voltage Series Sensor
Emitters with Quick Disconnect (4-pin Euro-Style)
All Other Models with Quick Disconnect (4-pin Euro-Style)
bn
bu
wh
bk
+
10-30V dc
–
bn
bu
wh
bk
Load
Load
+
10-30V dc
–
The output type for all models is Bipolar NPN/PNP; load 150 mA max., each output.
Sensor Mounting and Alignment
MINI-BEAM sensors perform most reliably if they are properly aligned and securely mounted.
For maximum mechanical stability, 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
http://
www.bannerengineering.com
or contact Banner Engineering 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.
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 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 reduces
the size of the movement zone for more precise alignment.
Repeat the alignment motions after each Gain reduction. When optimum alignment is achieved, 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) or be ON 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.
Opposed Mode Alignment
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
Receiver
Emitter
Ob
jec
t
Note:
•
•
Light condition: sensor output is
ON when there is no object in the
beam
Dark condition: sensor output is ON
when there is an object in the beam
P/N 69943 Rev. G
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3
MINI-BEAM
®
DC Voltage Series Sensor
Diffuse Mode Alignment
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
Note:
•
•
Light condition: sensor output is
ON when there is no object in the
beam
Dark condition: sensor output is ON
when there is an object in the beam
Ob
t
jec
Retroreflective Mode Alignment
tro
Re t
ge
Tar
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 SM312LV)
Note:
•
•
Light condition: sensor output is
ON when there is no object in the
beam
Dark condition: sensor output is ON
when there is an object in the beam
Convergent Mode Alignment
w
Lo vity
cti nd
fle
Re grou
ack
B
jec
Ob
t
The sensing energy of a convergent mode sensor is
concentrated at the specified focus point. 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
Note:
•
•
Light condition: sensor output is
ON when there is no object in the
beam
Dark condition: sensor output is ON
when there is an object in the beam
4
www.bannerengineering.com - Tel: + 1 888 373 6767
P/N 69943 Rev. G
MINI-BEAM
®
DC Voltage Series Sensor
Installing Plastic Fibers on a MINI-BEAM
Follow these instructions to install plastic fibers into your sensor. MINI-BEAMS may have either a fiber gripper or a clamp screw.
MINI-BEAM and ECONO-BEAM sensors for use with plastic fiber optic assemblies include sensors with the letters FP in their
model number.
MINI-BEAM "FP1" Sensor
Gripper
Unlock
Lock
Sensor Face
Plastic fiber
Receiver port
Plastic fiber
Emitter port
Adapters for
0.25- and 0.5-mm fibers
Trimmed fiber
control ends
Tighten Clamp Screw
to Secure Fiber
Sensor Face
0.25"
Slide Fibers & Bushings
into Ports
Fiber Bushings
(supplied with fiber)
Unterminated Plastic Fibers
Figure 1. MINI-BEAM with fiber grippers
Figure 2. MINI-BEAM with clamp screws
1. Prepare the sensor ends of the fibers (see
Cut the Plastic Fiber
on p. 5).
2. Prepare the sensor for the fibers.
• For models with a fiber gripper: Unlock the fiber gripper as shown in the figure and apply the appropriate fiber adaptors
to the fiber, if needed.
• For models with a clamp screw: Loosen the clamp screw on the sensor face.
3. Insert the plastic fibers.
• For models with a fiber gripper: Gently insert the prepared fiber ends into the ports as far as they will go.
• For models with a clamp screw: Align the fiber ends flush with the ends of the bushings as shown. Hold the bushings to
the fibers and slide both into the sensor ports. Push the fiber an additional 1 inch through the bushing.
4. Lock in the fibers.
• For models with a fiber gripper: Slide the fiber gripper back to lock, as shown in the figure.
• For models with a clamp screw: Tighten the clamp screw to secure the fibers.
Cut the Plastic Fiber
An unterminated plastic fiber is designed to be cut by the customer to the length required for the application. To facilitate cutting, a
Banner model PFC-4 cutting device is supplied with this fiber.
1. Locate the non-terminated end, and determine the length of fiber required for
the application.
2. Lift the top of the cutter to open the cutting ports.
3. Insert the non-terminated end through one of the four large cutting ports on the
PFC-4 cutter so that the excess fiber protrudes from the back of the cutter.
4. Double-check the fiber length, and close the cutter until the fiber is cut.
5. Gently wipe the cut ends of the fiber with a clean, dry cloth to remove any
contamination.
Note: Do not use solvents or abrasives on any exposed optical
fiber. Do not use a cutting port more than once. The blade may
tend to dull after one cut.
Installing the Glass Fibers in MINI-BEAMs
Retaining Clip
O-ring
P/N 69943 Rev. G
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5
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