Rain Bird ESPSM3 3-Station Expansion Module

The Rain Bird ESPSM3 is a hot‑swappable 3‑station expansion module that increases the zone capacity of compatible ESP modular controllers without interrupting irrigation schedules.

• Adds three stations: Each ESPSM3 provides three additional valve stations to Rain Bird ESP modular systems.
• Hot‑swappable installation: Install or remove the module while the controller remains powered—no need to stop watering.
• Wide compatibility: Works with ESP‑M, ESP‑Me, ESP‑SMT and ESP‑SMTe series controllers (verify your model).
• Retains programming: Built‑in lithium battery and nonvolatile memory preserve time, date and schedules during power interruptions.
• Compact, slide‑in design: Fits any available expansion slot; modules can be stacked to expand capacity further (controller limits apply).
• Technical specs at a glance: Model ESPSM3 (MFG F38200), 120 VAC, 0.06 A, dimensions roughly 10.7" W x 4.4" D x 7.7" H.

Ideal for homeowners and installers who need to grow an irrigation system incrementally, the ESPSM3 offers a low‑downtime, cost‑effective way to add zones. Always confirm controller compatibility and total station limits before installing multiple modules.