Text Size


4-zone base model, expandable to 16 zones using slm4 4-zone hot-swappable modules (indoor/outdoor rated)
Move your mouse over image or click to enlarge


Product SKU 04.04-2016-49-00
  • 4-zone base model, expandable to 16 zones using SLM4 4-zonehot-swappable modules (Indoor/Outdoor rated)
  • Internal 120VAC/230VAC transformer with plug and playpre-installed 6' line cord (removable for conduit-wired installations)
  • Large backlit LCD display
  • 2 run modes: Standard mode runs user input zone run times; AutoAdjust mode requires SLW Series On-Site Weather Station to calculateweather based run times
  • Rain/Freeze sensor bypass/active button displays sensor statuswith tricolor LEDs (red indicates sensor is prohibiting irrigation;orange indicates an extended rain delay; green indicates normaloperation)
  • 4 programs: A, B, C; program D can operate concurrently
  • 8 start times per program
  • Nonvolatile memory and real time clock/calendar to retainprograms and current date and time – no battery required
  • Zone run times from 1 min. to 9 hrs. 55 min. with operationcountdown displayed in hours, minutes, and seconds
  • Watering day selections of custom days of the week, odd/even, orinterval days (1 – 30 days)
  • Omit settings: omit time of day window, omit day(s) of week, andomit up to 7 calendar dates
  • Seasonal % adjust by program, by month for simple year roundwater 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 displaystransformer voltage; milliamp measurement for each zone
  • Built-in valve locator function for locating hidden valves bysimply listening for the audible chatter of the solenoid created by aunique 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 usedduring Auto Adjust mode
  • Review menu displays temperature readings (daily high/low) forprevious 5 days
  • Review menu accumulates total run times by zone from the lastreset date
  • Rain delay of 1 – 7 days may be selected (to pause andautomatically resume operation)
  • SLW Weather Station extended rain delay programmable from 0 – 99hours
  • Run/Soak cycles allow setting of maximum run time and minimumsoak time by program for use in Standard mode only
  • Zone-to-zone delay programmable for 1 min. - 3 hrs. toaccommodate slow closing valves and recharging of water supply
  • Master valve timing sequence with zone-valve programmable by “OnDelay” (1 sec. – 1 min.; 2 sec. default) and “Off Delay” (1 sec. – 3min.; 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 individualprogram
  • Clear all function to delete all programs
  • Backtrack stored program feature allows contractor to easilystore a default program and retrieve the saved program in the event acustomer improperly reprograms the SL1600



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)

Units in box: 1


Shopping Cart

Cart empty

Verify by

Verify by

We have 75 guests and no members online

[ Reset Settings ]