{"product_id":"shelly-pro-3em-relay-add-on","title":"Shelly Pro 3EM Switch Add-on 2A Dry Contact Relay DIN Rail","description":"\u003cp\u003eThe Shelly Pro 3EM Switch Add-on fits onto a Shelly Pro 3EM energy meter and gives it a galvanically isolated relay output. Clipped onto the DIN rail beside the meter, the pair can measure consumption and switch a contactor or other low current load from the same assembly.\u003c\/p\u003e\u003cp\u003eThe potential free contact switches up to 2A at 240V AC or 2A at 30V DC, suiting control circuits and light loads rather than direct switching of heavy appliances. A Shelly Pro 3EM is required to use it and is sold separately.\u003c\/p\u003e\u003ch2\u003eKey features of the Shelly Pro 3EM switch add-on\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eConnection\u003c\/strong\u003e, plugs into the Shelly Pro 3EM through the proprietary add-on interface.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eContact type\u003c\/strong\u003e, galvanically isolated, potential free, with separate I and O terminals.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSwitching rating\u003c\/strong\u003e, up to 2A at 240V AC or 2A at 30V DC.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePower draw\u003c\/strong\u003e, powered from the Pro 3EM at 3.3V and 12V DC, under 1W.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMonitoring\u003c\/strong\u003e, internal temperature sensor with reporting, plus Power and Out LED indicators.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHousing\u003c\/strong\u003e, 19mm wide, mounts on DIN rail with the supplied double bracket.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eProduct overview\u003c\/h2\u003e\u003cp\u003eOn its own, the Pro 3EM reports energy data across up to three phases. With the add-on fitted it can also act on that data, energising a contactor when a consumption, export or other condition is met. The add-on takes the place of the bracket on one side of the meter and draws power from it, so no separate supply is required.\u003c\/p\u003e\u003cp\u003eBecause the contact is isolated from the meter electronics, it can switch an AC circuit up to 240V or a DC control circuit up to 30V. Resistive, capacitive and inductive loads are all supported, including contactors, transformers and fans, with an RC snubber recommended for inductive loads.\u003c\/p\u003e\u003ch2\u003eApplications\u003c\/h2\u003e\u003cp\u003eDriving a contactor from measured consumption or export, switching small resistive loads such as indicator lamps, or carrying a low voltage DC control signal up to 30V into an inverter or controller enable input. Suited to consumer units, multi dwelling buildings, and light commercial or industrial monitoring panels.\u003c\/p\u003e\u003ch2\u003eInstallation notes\u003c\/h2\u003e\u003cp\u003eThis add-on only works with the Shelly Pro 3EM, sold separately, and is not a standalone switch. Fitting should be carried out by a qualified electrician to BS 7671, with the supply isolated and tested dead before working on the terminals. It has no published IP rating, so it must be installed in a dry indoor location only.\u003c\/p\u003e\u003ch2\u003eWhat's included\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e1 x Shelly Pro 3EM Switch Add-on\u003c\/li\u003e\n\u003cli\u003e1 x Double DIN rail mounting bracket\u003c\/li\u003e\n\u003cli\u003e1 x Printed user and safety guide\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Shelly","offers":[{"title":"Default Title","offer_id":67919907062048,"sku":"003118","price":37.95,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1010\/8148\/1504\/files\/ledandsolar-003118-1.webp?v=1792663275","url":"https:\/\/www.ledandsolar.co.uk\/en-eu\/products\/shelly-pro-3em-relay-add-on","provider":"LED \u0026 Solar","version":"1.0","type":"link"}