• 24 to 240V ac supply voltage with SPST solid-state outputs
  • Available in opposed, opposed clear plastic, polarized and non-polarized retroreflective, convergent, diffuse and divergent diffuse, and glass or plastic fiber optic sensing modes
  • Convergent and fiber optic models with infrared or visible red or green LED light source, depending on application
  • Opposed-mode models for clear plastic detection
  • 18 mm threaded barrel or side mounting options

Product Specifications

Supply Voltage and Current24 to 240V ac (50/60 Hz), 250V ac max.
RangeOpposed (long range):30 m
Opposed (short range):3 m
Opposed (clear object):0.3 m
Diffuse (long range):380 mm
Diffuse (short range):300 mm
Divergent Diffuse:130 mm
Non-polarized Retroreflective:5 m, range is specified using one model BRT-3 retroreflector
Polarized Retroreflective:50 mm to 2 m, range is specified using one model BRT-3 retroreflector
Polarized Retroreflective (extended range):10 mm to 3 m, range is specified using one model BRT-3 retroreflector
Convergent:16 or 43 mm, depending on model
Plastic and Glass Fiber Optic:Range varies by sensing mode and fiber optics used
Supply Protection CircuitryProtected against transient voltages
Output ConfigurationSPST SCR solid-state relay:Light operate (LO) or dark operate (DO) selectable; 2-wire hookup
Output RatingMin. load current 5 mA max. steady-state load capability 300 mA to 50° C ambient Inrush capability:3 A for 1 second (non repetitive); 10 A for 1 cycle (non repetitive)
OFF-state leakage current:less than 1.7 mA rms
ON-state voltage drop:less than or equal to 5 V @ 300 mA load, less than or equal to 10 V @ 15 mA load
Output Response TimeResponse time is independent of signal strength. OFF response time does not include load response of up to ½ ac cycle (8.3 milliseconds). Response time of load should be considered when important. Opposed:2 milliseconds ON; 1 millisecond OFF
Non-polarized and Polarized Retroreflective, Convergent and Plastic Fiber Optic:4 milliseconds ON/OFF
Diffuse and Glass Fiber Optic:8 milliseconds ON/OFF
Delay at Power-up300 milliseconds
RepeatabilityRepeatabilty is independent of signal strength. Opposed:0.3 milliseconds
Non-polarized and Polarized Retroreflective, Convergent and Plastic Fiber Optic:1.3 milliseconds
Diffuse and Glass Fiber Optic:2.6 milliseconds
AdjustmentsLight/Dark-operate select switch and 15-turn slotted brass screw sensitivity (Gain) 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.
IndicatorsRed LED on rear of sensor is ON when the load is energized
ConstructionReinforced thermoplastic polyester housing, totally encapsulated, o-ring sealing, acrylic lenses and stainless-steel screws
Environmental RatingNEMA 1, 2, 3, 3S, 4, 4X, 6, 12 and 13; IEC IP67
ConnectionsPVC-jacketed 2-conductor 2 m or 9 m cables, or 3-pin Micro-style QD. QD cable are ordered separately.
Operating ConditionsTemperature:-20° to +70° C
Relative humidity:90% @ 50° C (non-condensing)
Application Notesi.):Overload conditions can destroy ac MINI-BEAM sensors. Directly wiring sensor without load series across hot and neutral will damage sensor (except emitter models).
ii.):Low voltage use 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.


Data Sheets

Document Name Part Number File Size Download
1. MINI-BEAM SM2A312 AC Voltage Series Sensor 69942 Download
2. MINI-BEAM Series, Clear Plastic Detection models 03458 Download

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