{"product_id":"hydros-command-bus-terminator-signal-plug","title":"Hydros Command Bus Terminator | Signal Termination Plug for HYDROS Reef Controllers","description":"\u003cp\u003eThe \u003cstrong\u003eHYDROS Command Bus Terminator\u003c\/strong\u003e closes the Command Bus loop on your HYDROS reef controller setup, eliminating signal reflection that can cause flaky communication, dropped sensor reads, or false alarms. If you are running a HYDROS Control 4, Control X3\/X4, or a chain of HYDROS modules with an open Command Bus port, this plug is the missing piece for rock-solid system integrity.\u003c\/p\u003e\n\n\u003cp\u003eBuild out your HYDROS automation with more \u003ca href=\"https:\/\/squeakysaquatics.com\/collections\/hydros\"\u003eCoralVue HYDROS controllers, sensors, and accessories\u003c\/a\u003e, browse all \u003ca href=\"https:\/\/squeakysaquatics.com\/collections\/automation-controllers\"\u003eAutomation \u0026amp; Controllers\u003c\/a\u003e, or shop our complete \u003ca href=\"https:\/\/squeakysaquatics.com\/collections\/equipment\"\u003eAquarium Equipment\u003c\/a\u003e selection.\u003c\/p\u003e\n\n\u003ch3 style=\"margin:14px 0 4px;font-size:1.05em;font-weight:600;line-height:1.25;\"\u003eWhy You Need a Command Bus Terminator\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eEliminates signal reflection\u003c\/strong\u003e on the Command Bus so sensor and module data stay clean.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePrevents communication errors\u003c\/strong\u003e between HYDROS Control units, dosers, sensors, and accessories.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRequired on any open Command Bus port\u003c\/strong\u003e when chaining controllers (e.g. Control 4 + Control 3, or any multi-controller setup).\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePlug-and-play\u003c\/strong\u003e — no configuration, no firmware step. Push it in, you are done.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e1-year HYDROS warranty\u003c\/strong\u003e from CoralVue.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3 style=\"margin:14px 0 4px;font-size:1.05em;font-weight:600;line-height:1.25;\"\u003eHow It Works\u003c\/h3\u003e\n\u003cp\u003eThe Command Bus is a CAN-style communication line that links HYDROS modules together. Without proper termination at each open end of the bus, signals bounce back and create reflections — the digital equivalent of an audio echo. The Terminator presents the correct impedance (a 120 ohm load) so signals end cleanly at the bus boundary. Install one on every unused Command Bus port in your chain.\u003c\/p\u003e\n\n\u003ch3 style=\"margin:14px 0 4px;font-size:1.05em;font-weight:600;line-height:1.25;\"\u003eSpecifications\u003c\/h3\u003e\n\u003ctable style=\"width:100%;border-collapse:collapse;\"\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:6px 10px;background:#f7f7f7;width:40%;\"\u003e\u003cstrong\u003eBrand\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:6px 10px;\"\u003eHYDROS by CoralVue\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:6px 10px;background:#f7f7f7;\"\u003e\u003cstrong\u003eSKU\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:6px 10px;\"\u003eHDRS-CBC-TM\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:6px 10px;background:#f7f7f7;\"\u003e\u003cstrong\u003eType\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:6px 10px;\"\u003eCommand Bus terminator plug\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:6px 10px;background:#f7f7f7;\"\u003e\u003cstrong\u003eFunction\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:6px 10px;\"\u003eSignal termination \u0026amp; impedance matching (120 Ω)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:6px 10px;background:#f7f7f7;\"\u003e\u003cstrong\u003eColor\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:6px 10px;\"\u003eBlue\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:6px 10px;background:#f7f7f7;\"\u003e\u003cstrong\u003eCompatible With\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:6px 10px;\"\u003eHYDROS Control X3\/X4, Control 4, Control 3, and any HYDROS Command Bus device\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:6px 10px;background:#f7f7f7;\"\u003e\u003cstrong\u003eWarranty\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:6px 10px;\"\u003e1 year\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:6px 10px;background:#f7f7f7;\"\u003e\u003cstrong\u003eUPC\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:6px 10px;\"\u003e850009641335\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\n\u003ch3 style=\"margin:14px 0 4px;font-size:1.05em;font-weight:600;line-height:1.25;\"\u003eRecommended Pairings\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003ca href=\"https:\/\/squeakysaquatics.com\/products\/hydros-command-bus-cable-data-power\"\u003eHYDROS Command Bus Cable\u003c\/a\u003e — connect your modules together with the matching data + power cable.\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"https:\/\/squeakysaquatics.com\/products\/hydros-control-x3-xp8-pro-pack\"\u003eHYDROS Control X3 XP8 Pro Pack\u003c\/a\u003e — full smart controller bundle.\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"https:\/\/squeakysaquatics.com\/products\/hydros-control-x4-xp8-pro-pack-full-smart-aquarium-controller-set\"\u003eHYDROS Control X4 XP8 Pro Pack\u003c\/a\u003e — the top-tier reef automation setup.\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"https:\/\/squeakysaquatics.com\/products\/hydros-smart-plug\"\u003eHYDROS P205 Smart Plug\u003c\/a\u003e — add a WiFi outlet to any HYDROS system.\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"https:\/\/squeakysaquatics.com\/products\/hydros-triple-optical-ato-kit\"\u003eHYDROS Triple Optical ATO Kit\u003c\/a\u003e — auto top-off with redundant optical sensors.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3 style=\"margin:14px 0 4px;font-size:1.05em;font-weight:600;line-height:1.25;\"\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eDo I need this if I only have one HYDROS Control unit?\u003c\/strong\u003e\u003cbr\u003eIf both Command Bus ports on a single controller are unused, no — the controller terminates internally. As soon as you add a second HYDROS unit (a second Control, a doser, etc.) and leave any Command Bus port open, the open port needs a terminator.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eHow many do I need?\u003c\/strong\u003e\u003cbr\u003eOne on every unused Command Bus port in your chain. Most multi-controller setups use one or two total.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWill it work on the original HYDROS Control 1?\u003c\/strong\u003e\u003cbr\u003eYes — it terminates any HYDROS Command Bus connection regardless of controller generation.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eIs this needed for the Drive Port or Sense Port?\u003c\/strong\u003e\u003cbr\u003eNo — those are separate connection types. The terminator is only for the Command Bus.\u003c\/p\u003e","brand":"Hydros","offers":[{"title":"Default Title","offer_id":48341783118043,"sku":"HDRS-CBC-TM","price":6.34,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0767\/5209\/3403\/files\/CV64133-2T.png?v=1773241376","url":"https:\/\/squeakysaquatics.com\/products\/hydros-command-bus-terminator-signal-plug","provider":"Squeaky's Aquatics","version":"1.0","type":"link"}