{"product_id":"rain-bird-esp-sm3-3-station-expansion-module-for-esp-controllers","title":"Rain Bird ESP-SM3 3-Station Expansion Module for ESP Controllers","description":"\u003cp\u003eElevate your irrigation management with the Rain Bird ESP-SM3 3-Station Expansion Module. This compact add-on fits into your existing ESP4M base, unlocking three additional zones and paving the way to a total of up to 13 stations when paired with additional modules. Designed for durability, it supports both indoor and outdoor installations and can be hot-swapped into the controller without powering down, making capacity upgrades convenient and unobtrusive.\u003c\/p\u003e\n\n\u003cp\u003eInside, a 5-year lithium battery and nonvolatile memory safeguard your schedules and dates through interruptions like power outages. The module also features strong surge protection and a fuseless design with a diagnostic circuit breaker that helps identify a valve or wiring issue while keeping the remaining stations watering. A built-in 365-day calendar with leap year intelligence ensures your programming stays accurate year after year, with four irrigation cycle modes to cover a range of watering needs: a Custom 7-day calendar, a 131-day cyclic interval, and odd\/even day calendars. Contractors can rely on a default system view even if a homeowner has overridden programming, while homeowners can benefit from Rain Bird’s Extra Simple Programming style and a clear LCD display for straightforward setup.\u003c\/p\u003e\n\n\u003ch3\u003eWhat makes this module useful\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eThree zones added to a base ESP4M, enabling scalable expansion\u003c\/li\u003e\n  \u003cli\u003eHot-swap installation: upgrade without interrupting active watering\u003c\/li\u003e\n  \u003cli\u003eIndoor or outdoor compatibility for flexible placement\u003c\/li\u003e\n  \u003cli\u003eLarge LCD, simple controls, and clear prompts for easier configuration\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eReliability and smart diagnostics\u003c\/h3\u003e\n\u003cp\u003eRugged surge protection guards against electrical fluctuations, offering stronger protection than many comparable controllers. The fuseless design pairs with a diagnostic circuit breaker to pinpoint valve or wiring issues while continuing to water other zones, reducing downtime and simplifying troubleshooting.\u003c\/p\u003e\n\n\u003cul\u003e\n  \u003cli\u003e365-day calendar with leap year logic ensures long-term accuracy\u003c\/li\u003e\n  \u003cli\u003eNonvolatile memory preserves schedules through outages\u003c\/li\u003e\n  \u003cli\u003eFive-year lithium battery helps maintain timing and dates\u003c\/li\u003e\n  \u003cli\u003eEasy installation into any open controller slot\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003ePractical applications\u003c\/h3\u003e\n\u003cp\u003eIdeal for expanding residential or commercial irrigation setups where separate zones address lawns, garden beds, and planting areas. Whether you’re adapting to seasonal shifts or growing capacity, this module offers a streamlined way to manage more zones without a complete system overhaul.\u003c\/p\u003e\n\u003csection class=\"product-faq-snippet\"\u003e\u003ch3\u003eFAQ\u003c\/h3\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: What is the ESP-SM3 expansion module?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: It adds three irrigation zones to a Rain Bird ESP4M controller, enabling expansion up to 13 stations with multiple modules.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Can I install it without powering down?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Yes, it’s hot-swappable and fits in any open slot, works indoors or outdoors, and keeps schedules safe during outages.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"Rain Bird","offers":[{"title":"Default Title","offer_id":43982785052806,"sku":"B001QVMPC8","price":76.98,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0665\/1602\/5478\/files\/rain-bird-espsm3-three-station-expansion-module.jpg?v=1778766939","url":"https:\/\/patiozora.com\/products\/rain-bird-esp-sm3-3-station-expansion-module-for-esp-controllers","provider":"PatioZora","version":"1.0","type":"link"}