Weathermatic SLM2 SmartLine 2-Station Expansion Module

Expand a Weathermatic SmartLine controller quickly and cleanly with the SLM2 2-station expansion module. Designed for use with the SmartLine SL800 series, this compact slide-in module adds two additional irrigation zones and integrates with SmartLine features so you can scale a small residential controller without replacing the base unit.

• Adds 2 irrigation zones to compatible Weathermatic SmartLine controllers (SL800 series).
• Slide-in, hot‑swappable design lets you install or replace modules without powering down the controller.
• Controller recognizes the module automatically upon insertion—no extra programming required beyond zone setup.
• Enables SmartLine features such as Auto Adjust/ET watering and SmartLink network connectivity when used with compatible controllers and accessories.
• Compact, durable module built for field reliability and simple slot‑style installation; follow the controller manual for slot order and wiring.
• Ideal for upgrading small residential systems or adding zones to an existing SL800 installation.

Includes links to SmartLine documentation and installation guides with wiring diagrams and safety notes; consult the controller manual for transformer capacity and detailed installation procedures. If you need help confirming compatibility with your controller model, refer to the SmartLine series manuals or contact technical support.