MINI-BEAM SMU315 Universal Voltage Series


  • Universal supply voltage: 24 to 240V ac, 50/60 Hz; 24 to 250V dc
  • Popular, compact MINI-BEAM package with a SPDT electromechanical (E/M) relay
  • Available in opposed, polarized and non-polarized retroreflective, diffuse and divergent diffuse, convergent, and glass or plastic fiber optic sensing modes
  • 18 mm threaded barrel or side mounting options

Product Specifications

Supply Voltage and Current24 to 240V ac, 50/60 Hz or 24 to 240V dc (1.5 watts or 2.5 VA max.)
RangeOpposed (long range):30 m
Opposed (short range):3 m
Non-polarized Retroreflective:5 m, range is specified using one model BRT-3 retroreflector
Polarized Retroreflective:10 mm to 3 m, range is specified using one model BRT-3 retroreflector
Diffuse:380 mm
Divergent Diffuse:130 mm
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. DC hookup is without regard to polarity.
Output ConfigurationSPDT (Single-Pole, Double Throw) (form C) electromechanical relay, ON/OFF output
Output RatingMax. switching power (resistive load):90W, 250VA
Max. switching voltage (resistive load):250V ac or 30V dc
Max. switching current (resistive load):3 A
Min. voltage and current:5V dc, 10 mA
Mechanical life:20,000,000 operations
Electrical life at full resistive load:100,000 operations
Output Protection CircuitryProtected against false pulse on power-up
Output Response TimeClosure time:20 milliseconds max.
Release time:20 milliseconds max.
Max. switching speed:25 operations per second
Repeatability1 millisecond
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.
IndicatorsAlignment Indicating Device system (AID) 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).
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 5-conductor 2 m or 9 m cables. Opposed-mode emitter cables are 2-conductor.
Operating ConditionsTemperature:-20° to +55° C
Relative humidity:90% @ 50° C (non-condensing)
Application NoteInstall transient suppressor (MOV) across contacts switching inductive loads.


Product Instruction Manual

Document Name Part Number File Size Download
1. MINI-BEAM SMU315 Series, ac/dc models
(Universal Voltage Series)
69944 Download

Data Sheets

Document Name Part Number File Size Download
1. MINI-BEAM SMU315 Series, ac/dc models
(Universal Voltage Series)
55230 Download

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