SMI30 Series—Intrinsically Safe


  • Extremely rugged and powerful opposed-mode intrinsically safe barrel sensors are designed for the most demanding hazardous area sensing applications.
  • Sensor requires an approved intrinsic safety barrier and Banner MAXI-AMP model CI3RC2 current trip point amplifier
  • Sensor is certified as intrinsically safe for use in all hazardous atmospheres as defined by Article 500 of the National Electrical Code, when used with approved "positive input" intrinsic safety barriers.
  • Sensor is certified by Factory Mutual and CSA as non-incendive devices when used in Division 2 locations (except Groups E and F) without intrinsic safety barriers.
  • 10 millisecond sensor pairs have a 140 m range; 1 millisecond pairs have a 60 m range.
  • Modulation frequency "A" is standard; frequencies "B" and "C" are also available to minimize optical crosstalk from adjacent sensor pairs.

Product Specifications

Supply Voltage and CurrentEmitters:10 to 30V dc @ 25 mA
Receivers:10 to 30V dc @ less than 15 mA. Division 1 use, with barriers, requires minimum system supply voltage of 10V.
RangeOpposed (10 millisecond response):140 m
Opposed (1 millisecond response):60 m
Output ConfigurationReceivers:NPN (current sinking); light operate (LO) or dark operate (DO), depending on model
Output RatingThree-wire hookup sinks 15 mA max. continuous, 10 to 30V dc. Two-wire hookup sinks 10 mA max.
Output Protection CircuitryOutputs are short circuit protected
Output Response Time10 milliseconds ON/OFF or 1 millisecond ON/OFF, depending on model. Response time is independent of signal strength.
RepeatabilityRepeatability is independent of signal strength. Frequency A Units:
10 millisecond response:1 milliseconds
1 millisecond response:360 microseconds
Frequency B Units:1.6 milliseconds
Frequency C Units:
10 millisecond response:2.3 milliseconds
1 millisecond response:210 microseconds
IndicatorsInternal red LED, visible through the lens or from side of the sensor. Emitters (1 LED Indicator):
Red ON steady:power to sensor is ON
Receiver (1 LED Indicator):
Red:Lights whenever receiver sees its modulated light source
Construction30 mm diameter thermoplastic polyester housing, fully epoxy-encapsulated, positive sealed at both ends, quad-ring sealed acrylic lens. Two thermoplastic polyester jam nuts are included with each sensor.
Environmental RatingExceeds NEMA 6P; IEC IP67 standards
Connections3-pin Mini-style quick-disconnect fitting. QD cables are ordered separately. Cable electric properties:40 pf/ft; 20 µH/ft.
Operating ConditionsTemperature:-40° to +70° C
Relative humidity:90% @ 50° C (non-condensing)


Data Sheets

Document Name Part Number File Size Download
1. SMI30 Intrinsically Safe Series Sensor 35331 Download

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