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SL-1600 - Catalogue Page


Introducing The Next Generation SmartLine

The best just got even better!  SmartLine became the market leader based on your support and feedback.  And we were just getting started.  Thanks to your input, here's 10 all-new SmartLine features, each guaranteed to make your day!

  1. Selectable Number of Start Times (1-8)
  2. Grow-In Program
  3. Rain/Freeze Sensing Selectable by Zone
  4. Mode Selection by Zone
  5. Selectable Minimum Deficit
  6. Automatic Daylight Saving Time Adjustment
  7. Increased Precipitation Rate Resolution
  8. Sensor Position Selectable by Zone
  9. Increased Omit Date Options
  10. Increased Rain Delay Setting Options
  • 4-zone base model, expandable to 16 zones using SLM4 4-zone hot-swappable modules (Indoor/Outdoor rated)

  • Internal 120VAC/230VAC transformer with plug and play pre-installed 6' line cord (removable for conduit-wired installations)

  • Large backlit LCD display

  • 2 run modes: Standard mode runs user input zone run times; Auto Adjust mode requires SLW Series On-Site Weather Station to calculate weather based run times

  • Rain/Freeze sensor bypass/active button displays sensor status with tricolor LEDs (red indicates sensor is prohibiting irrigation; orange indicates an extended rain delay; green indicates normal operation)

  • 4 programs: A, B, C; program D can operate concurrently

  • 8 start times per program

  • Nonvolatile memory and real time clock/calendar to retain programs and current date and time – no battery required

  • Zone run times from 1 min. to 9 hrs. 55 min. with operation countdown displayed in hours, minutes, and seconds

  • Watering day selections of custom days of the week, odd/even, or interval days (1 – 30 days)

  • Omit settings: omit time of day window, omit day(s) of week, and omit up to 7 calendar dates

  • Seasonal % adjust by program, by month for simple year round water budgeting (monthly percentages overridden in Auto Adjust mode)


  • Fault review displays all faults, including open and shorted zones

  • Diagnostic test function using on-board multi-meter displays transformer voltage; milliamp measurement for each zone

  • Built-in valve locator function for locating hidden valves by simply listening for the audible chatter of the solenoid created by a unique electrical frequency (U.S. Patent No. 7,406,363)

  • Review menu displays accumulated ET deficits by zone (in inches) and corresponding zone run times for the next available watering day

  • Review menu displays maximum run time and minimum soak time used during Auto Adjust mode

  • Review menu displays temperature readings (daily high/low) for previous 5 days

  • Review menu accumulates total run times by zone from the last reset date

  • Rain delay of 1 – 7 days may be selected (to pause and automatically resume operation)

  • SLW Weather Station extended rain delay programmable from 0 – 99 hours

  • Run/Soak cycles allow setting of maximum run time and minimum soak time by program for use in Standard mode only

  • Zone-to-zone delay programmable for 1 min. - 3 hrs. to accommodate slow closing valves and recharging of water supply

  • Master valve timing sequence with zone-valve programmable by “On Delay” (1 sec. – 1 min.; 2 sec. default) and “Off Delay” (1 sec. – 3 min.; 5 sec. default) to allow for line fill and slow-closing valves

  • Master valve/pump start operation assignable On/Off by zone

  • Clear program function to selectively delete an individual program

  • Clear all function to delete all programs

  • Backtrack stored program feature allows contractor to easily store a default program and retrieve the saved program in the event a customer improperly reprograms the SL1600


  • ZIP Code input (5 digit) or Latitude input (±60° from EQUATOR) establish location of site for solar radiation calculation

  • Sprinkler type input allows selection for zone sprinkler type (SPRAY, ROTOR, DRIP, BUBBLER) with preset precipitation rate or specific input of the zone precipitation rate (.2 – 3.0" per hour)

  • Plant type input allows selection for zone plant type (COOL TURF, WARM TURF, SHRUBS, ANNUALS, TREES, NATIVE) with preset crop factors or specific input of the zone crop factor (10 – 300%)

  • Soil type input allows selection for the soil type (CLAY, SAND, LOAM) and slope (0 – 25°) for the purpose of automatically calculating a run/soak period to virtually eliminate run off

  • More/Less is settable by zone (-50% to +25%) for the purpose of fine tuning Auto Adjust run times to accommodate factors like shade, wind, and sprinkler inefficiencies


  • Manual test runs each zone with zone run times from 10 sec. up to 10 min.

  • Manual zone operation of a single zone (1 min. to 9 hrs. 55 min.)

  • Push button manual start of a program from control panel


4-zone base model, expandable to 16 zones
4-zone module for use in the SL1600

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SLW Series On-Site Weather Stations

SLRC and Sidekick Remote Controls

Rain Brain Universal Sensors



120VAC/60Hz @ 400mA for 3 valves


28VAC, 1.0A maximum


1.0A, slow blow


9-1/8" W x 10 ½" H x 4" D (23,2 cm x 25,7 cm x 10,2 cm)