Instruction Manual

page 3
MINI-BEAM
®
Sensors SMA31E/SM2A31R and SMA31EL/SM2A31RL
MINI-BEAM AC Product Specifications
Certifications
Supply Voltage and Current 24 to 240V ac (50/60 Hz), 250V ac max
Supply Protection Circuitry Protected against transient voltages
Output Configuration SPST SCR solid-state relay with either normally closed or normally open contact (light/dark operate
selectable); 2-wire hookup
Output Rating 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
Output Protection Circuitry Protected against false pulse on power-up
Output Response Time 2 millisecond on and 1 millisecond off
Repeatability 0.3 milliseconds
Adjustments LIGHT/DARK OPERATE select switch, and 15-turn slotted brass screw GAIN (sensitivity) 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.
Indicators Red indicator LED on rear of sensor is “ON” when the load is energized
Construction
Reinforced VALOX
®
housing, totally encapsulated, o-ring sealing, acrylic lenses, and stainless steel screws
Environmental Rating Meets NEMA standards 1, 2, 3, 3S, 4, 4X, 12, and 13; IEC IP67
Connections 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 8.
Operating Temperature Temperature: -20° to +70°C (-4° to +158°F)
Maximum Relative Humidity: 90% at 50°C (non-condensing)
Application Notes 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
VALOX
®
is a registered trademark of General Electric Company