The Irritrol RD600-EXT-R Rain Dial-R is a six-station outdoor irrigation controller for residential and light-commercial sprinkler systems. It provides straightforward local programming while supporting optional Irritrol weather, remote-control, and connected-management accessories. The outdoor cabinet is designed for exterior wall mounting, and the enclosure key is sold separately.
Three independent programs allow lawn, shrub, drip, or seasonal zones to use different watering days, start times, and station run times. Each program supports three daily start times for up to nine total starts. Station run time can be set from 1 to 59 minutes in one-minute increments or from 1.0 to 5.9 hours in six-minute increments. Water budgeting, monthly percentage presets, odd/even scheduling, skip-day intervals, excluded days, station delay, test-all-stations operation, and assignable pump/master-valve control provide flexible system management.
The controller is compatible with Irritrol RainSensor products and optional Climate Logic weather sensing, SMRT Logic remote access, and CRR handheld remotes. These accessories are sold separately. A 9-volt alkaline battery, also sold separately, supports armchair programming and maintains time and date during a power interruption.
Key Features
Six fixed irrigation stations
Outdoor wall-mount cabinet
Three independent programs
Three start times per program
Run times from 1 minute to 5.9 hours
Weekly, odd/even, and 1- to 31-day interval scheduling
Water budgeting and monthly percentage adjustment
Station delay for well recovery or slow-closing valves
Rain-sensor input with bypass
Pump/master-valve output assignable by station
Compatible with Climate Logic, SMRT Logic, and CRR accessories
Common Uses
Homes with up to six irrigation zones
Lawns with separate shrub or drip programs
Outdoor replacement of a compatible Rain Dial controller
Systems that may later add weather or remote-management accessories
Compatibility and Installation Notes
This is the six-station outdoor model. Use compatible 24 VAC irrigation valve solenoids and follow Irritrol wiring, grounding, sensor, and pump-relay instructions. Climate Logic, SMRT Logic, CRR remotes, rain sensors, the 9-volt battery, and the outdoor cabinet key are not included unless specifically stated.
Frequently Asked Questions
Does RD600-EXT-R include smart or internet control?
No. Optional SMRT Logic or Climate Logic equipment is required for those functions.
Can it control more than six stations?
No. This model has six station outputs. Choose the nine- or twelve-station Rain Dial-R model for additional zones.
Can it operate a pump start relay?
Yes. A compatible 24 VAC pump-start relay can be controlled through the master-valve/pump circuit when properly installed.
Why Buy the RD600-EXT-R from Big Frog Supply?
The six-station outdoor model is identified separately from the indoor and higher-station versions, helping you match the enclosure and zone count correctly. Big Frog Supply also carries compatible Irritrol rain sensors, valves, solenoids, and controller accessories for completing or servicing the system.
Product Videos
Product Type Outdoor irrigation controller
Manufacturer Part Number RD600-EXT-R
Station Count 6 fixed stations
Programs 3
Start Times 3 per program; 9 total
Station Run Times 1-59 minutes or 1.0-5.9 hours
Watering Schedules Days of week; odd/even; 1-31 day interval
Maximum Output per Station 24 VAC; 0.5 A
Maximum Output to Valves 24 VAC; 1.0 A including master valve/pump circuit
Transformer Input 120 VAC; 60 Hz
Transformer Output 24 VAC; 1.25 A
Battery 9V alkaline; not included
Sensor Input Included with bypass
Optional Connectivity Climate Logic; SMRT Logic; CRR remote
Height 7-3/4 in.
Width 10-3/4 in.
Depth 4 in.
Enclosure Outdoor wall mount
