MINI-BEAM
®
SM2A312CV and SM2A312CV2
Self-contained AC-operated Convergent Mode Sensors
• Compact, modulated, self-contained convergent mode
sensors for 24-240V ac operation
• Produces a precise 1.3 mm (0.05 in) diameter sensing spot
at a focus point 16 mm (0.65 in) from the lens surface
(model SM2A312CV) or a 3.0 mm (0.12 in) sensing spot at
43 mm (1.70 in) focus (model SM2A312CV2)
• Switch-selectable for light operate or dark operate
• SPST SCR solid-state output switches up to 300mA; low
leakage current and saturation voltage
• Rugged, epoxy-encapsulated construction: meets NEMA
standards 1, 2, 3, 3S, 4, 4X, 12 and 13; IEC IP67
• Physically and electrically interchangeable with 18 mm
barrel-type photoelectrics
Visible red, 650 nm
MINI-BEAM Convergent Mode
Models
Range
16 mm
(0.65 in)
SM2A312CV
SM2A312CVQD
Spot
Size
at Focus:
1.3 mm
(0.05 in)
2 m (6.5 ft)
3-Pin Micro QD
24-240V ac
SPST
Solid-state
2-Wire
Cable
Supply
Voltage
Output
Type
1000
Excess Gain
Beam Pattern
Performance based on 90% reflectance white test card
SM2A312CV
E
X
C
E
S
S
G
A
I
N
3.0 mm
Convergent Mode
100
2.0 mm
1.0 mm
0
1.0 mm
10
2.0 mm
3.0 mm
0
10 mm
.4 in
100 mm
4 in
1000 mm
40 in
SM2A312CV
Convergent Mode
0.12 in
0.08 in
0.04 in
0
0.04 in
0.08 in
0.12 in
1
1 mm
.04 in
7.5 mm
0.3 in
15 mm 22.5 mm 30 mm 37.5 mm
0.6 in
0.9 in
1.2 in
1.5 in
DISTANCE
DISTANCE
1000
43 mm
(1.7 in)
SM2A312CV2
SM2A312CV2QD
Spot
Size
at Focus:
3.0 mm
(0.12 in)
2 m (6.5 ft)
3-Pin Micro QD
24-240V ac
SPST
Solid-state
2-Wire
SM2A312CV2
E
X
C
E
S
S
G
A
I
N
Convergent Mode
100
3.0 mm
2.0 mm
1.0 mm
0
SM2A312CV2
Convergent Mode
0.12 in
0.08 in
0.04 in
0
0.04 in
0.08 in
0.12 in
10
1.0 mm
2.0 mm
3.0 mm
1
1 mm
.04 in
0
10 mm
.4 in
100 mm
4 in
1000 mm
40 in
25 mm
1 in
50 mm
2 in
75 mm
3 in
100 mm 125 mm
4 in
5 in
DISTANCE
DISTANCE
For Standard MINI-BEAMs:
i) 9 m (30 ft) cables are available by adding suffix
“W/30”
to the model number of any cabled sensor (e.g. -
SM2A312CV W/30).
ii) A 150 mm (6 in.) long pigtail cable with attached QD connector is available by adding suffix
“QDP”
to the model number of any
MINI-BEAM sensor (e.g. -
SM2A312CVQDP).
See page 5 for more information.
iii) A model with a QD connector requires an accessory mating cable. See page 5 for more information.
Printed in USA
P/N 03402L7H
MINI-BEAM
®
Sensors
SM2A312CV and SM2A312CV2
MINI-BEAM Installation and Alignment
Proper operation of the SM2A312CV or SM2A312CV2 sensor requires that
it be mounted securely and aligned properly. In some applications,
excessive movement or vibration can result in intermittent or false
operation caused by loss of alignment. For best results, final-mount the
sensor in an 18mm-hole by its threaded barrel or use a mounting bracket
(see page 6).
Begin with the sensor at the approximate position where it will be
mounted. With power applied to the circuit and with the sensor set for
“light operate”, direct the sensor’s visible red spot at the object
approximately 16 mm (0.65 in) (for model SM2A312CV) or 43 mm (1.7
in) (for model SM2A312CV2) directly in front of the lens. Move the sensor
very slightly toward or away from the object while observing the red LED
indicator on the back of the sensor. Note the near and far points at which
sensing occurs (the range of distance over which the LED remains lit).
Mount the sensor at a point approximately midway in the range. This
should correspond to the point at which the red sensing spot on the object
appears most sharply defined. Mount the sensor at this position and
distance.
CONVERGENT MODE ALIGNMENT
kg
ac
rou
nd
w
Lo
R
ti
ec
efl
yB
vit
Ob
jec
t
SM2A312CV
or
SM2A312CV2
Up
Ri
gh
t
Le
ft
wn
Do
Distance from Sensor lens to object:
16 mm (0.65 in) for SM2A312CV
43 mm (1.7 in) for SM2A312CV2
SM2A312CV OR CV2
15 Turn
Gain
Adjustment
and Light/Dark
Operate Switch*
Gasketed
Acrylic Cover
Red LED lights when the
sensor's output is conducting
* Note regarding Light/Dark operate switch:
• Turn switch
fully
clockwise for light operate (sensor outputs conduct when object is present)
• Turn switch
fully
counterclockwise for dark operate (sensor outputs conduct when object is absent)
page
2
MINI-BEAM
®
Sensors
SM2A312CV and SM2A312CV2
MINI-BEAM AC Product Specifications
Supply Voltage and Current
Supply Protection Circuitry
Output Configuration
Output Rating
24 to 240V ac (50/60 Hz), 250V ac max
Protected against transient voltages
SPST SCR solid-state relay with either normally closed or normally open contact (light/dark operate
selectable); 2-wire hookup
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
Protected against false pulse on power-up
4 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.)
1.3 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 po-
tentiometer (clutched at both ends of travel). Both controls are located on rear panel of sensor and
protected by a gasketed, clear acrylic cover.
Red indicator LED on rear of sensor is “ON” when the load is energized
Reinforced VALOX
®
housing, totally encapsulated, o-ring sealing, acrylic lenses, and stainless steel screws
Meets NEMA standards 1, 2, 3, 3S, 4, 4X, 12, and 13; IEC IP67
PVC-jacketed 2-conductor 2 m (6.5ft) or 9 m (30ft) cables, or 3-pin micro-style quick disconnect (QD)
fitting are available. QD cables are ordered separately. See page 5.
Temperature:
-20° to +70°C (-4° to +158°F)
Maximum Relative Humidity:
90% at 50°C (non-condensing)
i) ac MINI-BEAMs may be destroyed from overload conditions
ii) Use on low voltage requires careful analysis of the load to determine if the leakage current or on-state
voltage of the sensor will interfere with proper operation of the load
iii) 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
Output Protection Circuitry
Output Response Time
Repeatability
Adjustments
Indicators
Construction
Environmental Rating
Connections
Operating Temperature
Application Notes
Certifications
VALOX
®
is a registered trademark of General Electric Company
page
3
MINI-BEAM
®
Sensors
SM2A312CV and SM2A312CV2
MINI-BEAM AC Hookup Diagrams
AC Sensors with Attached Cable
AC Sensors with Quick Disconnect
(3-Pin Micro-Style)
rd/bk
24-240V ac
bu
Load
bn
rd/wh
gn
24-240V ac
Load
3-Pin Micro-Style Pin-out
(Cable Connector Shown)
Green Wire
Quick Disconnect (QD) Option
AC MINI-BEAM sensors are sold with either a 2 m (6.5 ft)
or a 9 m (30 ft) attached PVC-covered cable, or with a 3-pin
micro-style QD cable fitting.
AC QD sensors are identified by the letters “QD” in their
model number suffix. For more information on mating QD
cables, see page 5.
Red/White
Wire
Red/Black
Wire
MINI-BEAM Dimension Information
MINI-BEAM AC Sensor with Integral Cable
3.2 mm
(0.13 in)
30.7 mm
(1.21 in)
12.2 mm (0.48 in)
ø 3 mm Clearance (2)
MINI-BEAM AC Sensor with Quick-Disconnect
24.1 mm
(0.95 in)
2 m (6.5 ft) Cable
M18 x 1 x 15 mm Thread
(Mounting Nut Supplied)
1/2-20 UNF Thread
Quick Disconnect
19.1 mm
(0.75 in)
Mounting Peg
(ø 6.3 mm x 2.5 mm)
20.0 mm
(0.79 in)
66.0 mm
(2.60 in)
27.4 mm (1.08 in)
page
4
MINI-BEAM
®
Sensors
SM2A312CV and SM2A312CV2
MINI-BEAM MODIFICATIONS
Model Suffix
W/30
Modification
9 meter (30 ft) cable
Description
All MINI-BEAM sensors may be ordered with an integral 9 m (30 ft)
cable in place of the standard 2 m (6.5 ft) cable
All MINI-BEAMs may be built
with a 150 mm (6 in) long
integral cable which is
terminated with the
appropriate QD connector.
Example of Model
Number
SM2A312CV W/30
QDP
Pigtail Quick
Disconnect
SM2A312CVQDP
Replacement Lens Assemblies
MINI-BEAM lens assemblies are field-replaceable.
Model
Description
UC-300C.7
UC-300C2
Replacement lens for CV
Replacement lens for CV2
Micro-Style Quick Disconnect Cables
Cable:
PVC jacket, polyurethane connector body, nickel-plated brass coupling nut
Conductors:
22 or 20 AWG high-flex stranded, PVC insulation, gold-plated contacts
Temperature:
-40 to +80°C (-40 to +176°F)
Voltage Rating:
250V ac/300V dc (3-pin), 125V ac/150V dc (4-pin)
Style
Model
Length
Dimensions
Pin-out
3-Pin
Straight
MQDC-306
MQDC-315
MQDC-330
2 m (6.5 ft)
5 m (15 ft)
9 m (30 ft)
ø15 mm
(0.6 in)
44 mm max.
(1.7 in)
ø1/2-20UNF-2B
Green Wire
38 mm max.
(1.5 in)
Red/White
Wire
Red/Black
Wire
3-Pin
Right-angle
MQDC-306RA
MQDC-315RA
MQDC-330RA
2 m (6.5 ft)
5 m (15 ft)
9 m (30 ft)
1/2-20UNF-2B
ø15 mm
(0.6 in)
38 mm max.
(1.5 in)
page
5
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