SL-2 - Viking Electronics

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LED Strobe and/or Beacon Visual Indicator with Programmable Brightness and Flash Patterns

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Product Details

The SL-2 is a 360° LED Strobe and/or Beacon visual indicator. LED’s not only are more efficient and last longer than standard flash tubes but are also immune to shock and vibration. The LED’s are internally positioned to allow a 360° viewing angle when the unit is mounted vertically and a 120° viewing angle when side mounted.

The SL-2 can be user programmed to output 4 different flash patterns: Single Flash, Double Flash, Quad Flash or Flicker Flash. The unit can also be programmed as a continuous-On Beacon only, Strobe only or Beacon/Strobe allowing a lower intensity beacon to remain on and a high intensity strobe to be activated by a contact closure. 6 different brightness levels are also programmable for the Beacon and the Strobe. All programming is stored in non-volatile memory so you won’t lose the programming when the unit is powered down, allowing you to program units prior to installation.

The SL-2 is designed for indoor applications and comes standard with a Blue shatter resistant polycarbonate lens. Optional Red, Amber, Green and Clear lenses are sold separately (go to and click on spare parts). Unit surface mounts to wall, post, panel, 4” electrical box or wet location electrical box round lamp holder cover.

For outdoor installations where the unit is exposed to precipitation or condensation, use model SL-2-EWP. For more information on Enhanced Weather Protection (EWP), see DOD 859.


  • High noise level areas where visual status is required
  • Signal personnel of equipment malfunctions
  • Warn personnel they are entering a restricted area


  • Durable polycarbonate lens
  • High-output long life LED technology
  • Four programmable flash patterns:
    • Single Flash
    • Double Flash
    • Quad Flash
    • Flicker Flash
  • 6 programmable beacon and strobe brightness settings
  • Immune to shock and vibration
  • Low current draw
  • Shatter resistant polycarbonate lens


  • Power: 10- 15VDC 0.90 Amp(Peak), 0.15 Amp(Avg) @ 15VDC. Note: Power supply not included. The SL-2 is compatible with Viking model PS-2A 12VDC power supply.
  • Maximum Wire Run Length with CAT-5 and PS-2 Power Supply:
    • 3 wires = 100 ft
    • 6 wires = 300 ft
  • Dimensions: 4.41″ diameter x 2.76″ (112mm diameter x 70mm)
  • Shipping Weight: 0.6 lbs (0.25 kg)
  • Operating Temperature: -40°F to 140°F (-40°C to 60°C)
  • Humidity: 5% to 95% non-condensing
  • Strobe Flash Rate: 60 flashes per minute (default)
  • Maximum Strobe Light Output @ 15VDC:
    • Clear lens: 323 lumens
    • Amber lens: 242 lumens
    • Blue lens: 116 lumens
    • Red lens: 66 lumens
  • Connections: Three 9″ (22.9 cm) long leads, 26 AWG