{"product_id":"thinkgrow-100-277v-smart-junction-box-opa-2","title":"ThinkGrow OPA-2 Smart Junction Box | 30A Breaker, Energy Meter \u0026 LED Group Control","description":"\u003ch2\u003eThinkGrow OPA-2 Meters and Protects Every LED String\u003c\/h2\u003e\u003cp style=\"text-align: justify;\"\u003eA full LED string can run close to a circuit's limit, and a panel breaker shows nothing about the actual load. The OPA-2 is an electronic circuit breaker and energy meter that installs at the head of each ThinkGrow string. Main power is hard-wired into the box, and the first fixture connects through ThinkGrow's push-lock daisy-chain power cord. A backlit screen shows live \u003cstrong\u003evoltage, current, watts and power factor\u003c\/strong\u003e. TrolMaster rates voltage and current readings to ±2% and power to ±5%. The box accepts \u003cstrong\u003e100–277V\u003c\/strong\u003e at 50 or 60Hz, covering standard commercial lighting circuits. Communication with TrolMaster controllers runs over RS-485, so the same readings appear at the controller. The OPA-2 can also stand in for an LMA-G group adapter. It holds Line 1 and Line 2 levels for light groups 0–9, plus UV, white, deep red and far red values for spectrum groups 0–9. TrolMaster lists it as ETL and FCC marked, conforming to UL 60730-1 and certified to CAN\/CSA E60730-1.\u003c\/p\u003e\u003ch2\u003eSetting Trip Points on a Grow Light Circuit Breaker\u003c\/h2\u003e\u003cp style=\"text-align: justify;\"\u003eHold the front button for five seconds to open the overload menu. Tap to cycle through 15A, 20A and 30A, then hold again to confirm the choice. If current climbs 20% past that point, the box cuts power within half a second. Holding the button for five seconds after a trip restores power once the fault is cleared. Pick the setting that matches the branch circuit, not just the fixtures on it. To wire the feed, remove two screws, pass the supply cable through the gland and land it on the three terminals. The back plate mounts to a wall, and the chassis screws onto it from both sides. Install it indoors where it cannot get wet, and have a licensed electrician make the supply connection. The box includes an ECS-7 daisy-chain control cable, two ECS-9 RJ12 to 4-pin IP65 cables and two Y-splitters. For non-ThinkGrow loads on the output, pair it with the DOA-10 hardwire cord.\u003c\/p\u003e\u003ch3\u003e\u003cstrong\u003eKey Features\u003c\/strong\u003e\u003c\/h3\u003e\u003cul style=\"text-align: justify;\"\u003e\n\u003cli\u003e\n\u003cstrong\u003eReal-Time Energy Metering:\u003c\/strong\u003e Shows voltage, current, watts and power factor for each LED string.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e15 \/ 20 \/ 30A Trip Points:\u003c\/strong\u003e Electronic overcurrent protection trips within 0.5 seconds at 20% over the set point.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLED Group Control:\u003c\/strong\u003e Works as an LMA-G, storing light group and spectrum settings for groups 0–9.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTrolMaster Integration:\u003c\/strong\u003e RS-485 link brings readings and settings to Hydro-X controllers.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCertified Build:\u003c\/strong\u003e ETL and FCC marked; conforms to UL 60730-1 and certified to CAN\/CSA E60730-1.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp style=\"text-align: justify;\"\u003e\u003cstrong\u003eTechnical Specifications\u003c\/strong\u003e\u003c\/p\u003e\u003ctable style=\"width:100%; border-collapse:collapse;\"\u003e\n\u003cthead\u003e\u003ctr style=\"background-color:#333; color:#fff;\"\u003e\n\u003cth style=\"padding:8px; text-align:left;\"\u003eSpecification\u003c\/th\u003e\n\u003cth style=\"padding:8px; text-align:left;\"\u003eValue\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr style=\"background-color:#fff;\"\u003e\n\u003ctd style=\"padding:8px;\"\u003ePart number\u003c\/td\u003e\n\u003ctd style=\"padding:8px;\"\u003eOPA-2\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color:#f9f9f9;\"\u003e\n\u003ctd style=\"padding:8px;\"\u003eInput voltage\u003c\/td\u003e\n\u003ctd style=\"padding:8px;\"\u003e100–277V~, 50\/60Hz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color:#fff;\"\u003e\n\u003ctd style=\"padding:8px;\"\u003eRated current\u003c\/td\u003e\n\u003ctd style=\"padding:8px;\"\u003e30A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color:#f9f9f9;\"\u003e\n\u003ctd style=\"padding:8px;\"\u003eTrip points\u003c\/td\u003e\n\u003ctd style=\"padding:8px;\"\u003e15A \/ 20A \/ 30A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color:#fff;\"\u003e\n\u003ctd style=\"padding:8px;\"\u003eTrip response\u003c\/td\u003e\n\u003ctd style=\"padding:8px;\"\u003eWithin 0.5 s at +20% over set point\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color:#f9f9f9;\"\u003e\n\u003ctd style=\"padding:8px;\"\u003eMeasurement accuracy\u003c\/td\u003e\n\u003ctd style=\"padding:8px;\"\u003eVoltage ±2%, current ±2%, power ±5%, PF ±10%\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color:#fff;\"\u003e\n\u003ctd style=\"padding:8px;\"\u003eCommunication\u003c\/td\u003e\n\u003ctd style=\"padding:8px;\"\u003eRS-485\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color:#f9f9f9;\"\u003e\n\u003ctd style=\"padding:8px;\"\u003eGroup control\u003c\/td\u003e\n\u003ctd style=\"padding:8px;\"\u003eLight groups 0–9 (Line 1\/2); spectrum groups 0–9 (UV, white, deep red, far red)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color:#fff;\"\u003e\n\u003ctd style=\"padding:8px;\"\u003eOperating environment\u003c\/td\u003e\n\u003ctd style=\"padding:8px;\"\u003e32–104°F (0–40°C), ≤90% RH\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color:#f9f9f9;\"\u003e\n\u003ctd style=\"padding:8px;\"\u003eDimensions\u003c\/td\u003e\n\u003ctd style=\"padding:8px;\"\u003e10.83 × 6.69 × 3.74 in (275 × 170 × 95 mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color:#fff;\"\u003e\n\u003ctd style=\"padding:8px;\"\u003eUnit weight\u003c\/td\u003e\n\u003ctd style=\"padding:8px;\"\u003e1.96 lbs (0.89 kg)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color:#f9f9f9;\"\u003e\n\u003ctd style=\"padding:8px;\"\u003eCertifications\u003c\/td\u003e\n\u003ctd style=\"padding:8px;\"\u003eETL, FCC; conforms to UL 60730-1; certified to CAN\/CSA E60730-1\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color:#fff;\"\u003e\n\u003ctd style=\"padding:8px;\"\u003ePackage contents\u003c\/td\u003e\n\u003ctd style=\"padding:8px;\"\u003eOPA-2, ECS-7 12 ft daisy-chain control cable, 2 × ECS-9 cables, 2 × Y-splitters\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e","brand":"ThinkGrow","offers":[{"title":"Default Title","offer_id":50528181715158,"sku":"OPA-2","price":218.5,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0723\/9450\/6454\/files\/thinkgrow-opa-2-main-v1.webp?v=1790264279","url":"https:\/\/growershouse.com\/products\/thinkgrow-100-277v-smart-junction-box-opa-2","provider":"GrowersHouse","version":"1.0","type":"link"}