{"product_id":"pentaircomportexpansionmodule520818","title":"Pentair | 520818 | Serial COM Port Expansion Module for IntelliTouch and EasyTouch Control Systems","description":"\u003cdiv class=\"flex flex-col text-sm pb-25\"\u003e\n\u003csection class=\"text-token-text-primary w-full focus:outline-none [--shadow-height:45px] has-data-writing-block:pointer-events-none has-data-writing-block:-mt-(--shadow-height) has-data-writing-block:pt-(--shadow-height) [\u0026amp;:has([data-writing-block])\u0026gt;*]:pointer-events-auto scroll-mt-[calc(var(--header-height)+min(200px,max(70px,20svh)))]\" dir=\"auto\" data-turn-id=\"request-69c1822c-cc1c-83e8-b9b7-4a8ecc18c8e8-9\" data-testid=\"conversation-turn-342\" data-scroll-anchor=\"true\" data-turn=\"assistant\"\u003e\n\u003cdiv class=\"text-base my-auto mx-auto pb-10 [--thread-content-margin:var(--thread-content-margin-xs,calc(var(--spacing)*4))] @w-sm\/main:[--thread-content-margin:var(--thread-content-margin-sm,calc(var(--spacing)*6))] @w-lg\/main:[--thread-content-margin:var(--thread-content-margin-lg,calc(var(--spacing)*16))] px-(--thread-content-margin)\"\u003e\n\u003cdiv class=\"[--thread-content-max-width:40rem] @w-lg\/main:[--thread-content-max-width:48rem] mx-auto max-w-(--thread-content-max-width) flex-1 group\/turn-messages focus-visible:outline-hidden relative flex w-full min-w-0 flex-col agent-turn\"\u003e\n\u003cdiv class=\"flex max-w-full flex-col gap-4 grow\"\u003e\n\u003cdiv data-message-author-role=\"assistant\" data-message-id=\"287e06a8-1656-4ed5-b428-2df429743284\" dir=\"auto\" data-message-model-slug=\"gpt-5-4-thinking\" class=\"min-h-8 text-message relative flex w-full flex-col items-end gap-2 text-start break-words whitespace-normal outline-none keyboard-focused:focus-ring [.text-message+\u0026amp;]:mt-1\" data-turn-start-message=\"true\" tabindex=\"0\"\u003e\n\u003cdiv class=\"flex w-full flex-col gap-1 empty:hidden\"\u003e\n\u003cdiv class=\"markdown prose dark:prose-invert w-full wrap-break-word dark markdown-new-styling\"\u003e\n\u003cp data-start=\"141\" data-end=\"542\"\u003eThe Pentair 520818 Serial COM Port Expansion Module is a replacement automation interface component designed for compatible Pentair IntelliTouch and EasyTouch pool and spa control systems. This module expands available communication connections within the control panel, helping support additional accessory integration and more flexible system configuration during installation, upgrade, or repair.\u003c\/p\u003e\n\u003chr data-start=\"544\" data-end=\"549\"\u003e\n\u003ch2 data-section-id=\"14at72t\" data-start=\"551\" data-end=\"568\"\u003eKey Features\u003c\/h2\u003e\n\u003cp data-start=\"569\" data-end=\"1687\"\u003e• Serial COM port expansion module is designed for use with compatible Pentair IntelliTouch and EasyTouch automation control systems.\u003cbr data-start=\"702\" data-end=\"705\"\u003e• This component expands available communication connections to support additional compatible accessories and connected equipment.\u003cbr data-start=\"835\" data-end=\"838\"\u003e• Module design helps increase system flexibility in installations that require more communication ports than the base panel provides.\u003cbr data-start=\"972\" data-end=\"975\"\u003e• Common compatible accessory types include indoor control panels, wireless control interfaces, ScreenLogic protocol adapters, and other communication-based automation devices.\u003cbr data-start=\"1151\" data-end=\"1154\"\u003e• Additional two-pin communication terminals support compatible IntelliFlo pump connection requirements in supported system layouts.\u003cbr data-start=\"1286\" data-end=\"1289\"\u003e• Intended for maintenance, replacement, or system expansion when an existing automation panel requires more communication capacity.\u003cbr data-start=\"1421\" data-end=\"1424\"\u003e• OEM replacement design helps maintain fit and function within the original Pentair automation enclosure and low-voltage control area.\u003cbr data-start=\"1559\" data-end=\"1562\"\u003e• Kit configuration is commonly associated with a 1 foot cable and mounting hardware for installation in compatible panels.\u003c\/p\u003e\n\u003chr data-start=\"1689\" data-end=\"1694\"\u003e\n\u003ch2 data-section-id=\"53drpp\" data-start=\"1696\" data-end=\"1717\"\u003eProduct Overview\u003c\/h2\u003e\n\u003cp data-start=\"1718\" data-end=\"2297\"\u003eThe Pentair 520818 Serial COM Port Expansion Module is an automation expansion component used with compatible IntelliTouch and EasyTouch control systems when additional communication connections are needed. Its primary role is to increase the number of available ports inside the automation panel so more accessories and supported equipment can be integrated into the system without replacing the main controller. This makes it especially useful in more advanced pool and spa setups where multiple connected devices must communicate with the automation system at the same time.\u003c\/p\u003e\n\u003cp data-start=\"2299\" data-end=\"2911\" data-is-last-node=\"\" data-is-only-node=\"\"\u003eThis module is well suited for upgrade, repair, or expansion situations where the main automation enclosure remains serviceable but available communication ports are limited. By adding more connection points for compatible accessories and pump communication wiring, it helps extend the functionality of the automation platform while keeping the installation organized within the low-voltage compartment. For pool owners and service professionals maintaining compatible Pentair automation systems, the 520818 fills an important role in expanding communication capacity and supporting more flexible system control.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"z-0 flex min-h-[46px] justify-start\"\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003cdiv class=\"mt-3 w-full empty:hidden\"\u003e\n\u003cdiv class=\"text-center\"\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/section\u003e\n\u003c\/div\u003e\n\u003cdiv aria-hidden=\"true\" data-edge=\"true\" class=\"pointer-events-none h-px w-px absolute bottom-0\"\u003e\u003cbr\u003e\u003c\/div\u003e","brand":"Pentair","offers":[{"title":"Default Title","offer_id":48995020538168,"sku":"520818","price":89.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0808\/6319\/9544\/files\/PEN520818_0.jpg?v=1777917417","url":"https:\/\/appaetechpoolsupply.com\/products\/pentaircomportexpansionmodule520818","provider":"AppaeTech Pool Supply","version":"1.0","type":"link"}