{"product_id":"poejk-s4sfp-120","title":"Grid Industrial Gigabit PoE Switch | 4 PoE Downlink Ports + 1 SFP Uplink | POEJK-S4SFP-120","description":"\u003ch2\u003eOverview\u003c\/h2\u003e\n\u003cp\u003eThe \u003cstrong\u003ePOEJK-S4SFP-120\u003c\/strong\u003e is an \u003cstrong\u003eindustrial Gigabit PoE+ switch\u003c\/strong\u003e with four copper PoE+ ports and a single SFP uplink, designed for DIN-rail and wall-mount applications. It is unmanaged, supports \u003cstrong\u003e10\/100\/1000 Mbps\u003c\/strong\u003e on copper and offers a flexible \u003cstrong\u003e12–48 VDC input\u003c\/strong\u003e with dual redundant power connections.\u003c\/p\u003e\n\u003cp\u003eThis compact PoE+ switch is ideal when you need a \u003cstrong\u003esmall 4-port PoE+ edge node with fibre or SFP uplink\u003c\/strong\u003e that fits neatly into DC microgrid and remote enclosure designs.\u003c\/p\u003e\n\n\u003ch2\u003eKey features\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eIndustrial Gigabit Ethernet PoE switch – unmanaged\u003c\/strong\u003e for simple operation.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003e4 × 10\/100\/1000 Mbps copper ports\u003c\/strong\u003e with \u003cstrong\u003e802.3af\/at PoE+ injector function\u003c\/strong\u003e on ports 1–4.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003e1 × SFP uplink port\u003c\/strong\u003e supporting \u003cstrong\u003e1000Base-X or 100Base-FX\u003c\/strong\u003e (auto-detection).\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDual redundant power input\u003c\/strong\u003e (12–48 VDC) using external supplies such as POEJK-PS48-150 \/ -200 \/ -240 (sold separately).\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOutput power up to 48 VDC\u003c\/strong\u003e (per manufacturer specification).\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eRugged IP40 aluminum housing\u003c\/strong\u003e for industrial and light-commercial installations.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eExtended operating temperature\u003c\/strong\u003e from \u003cstrong\u003e-40°C to +80°C\u003c\/strong\u003e (-40°F to 176°F).\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFlexible mounting\u003c\/strong\u003e – DIN-rail, wall-mount or shelf-mount.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eTechnical highlights\u003c\/h2\u003e\n\u003cdiv style=\"overflow-x:auto\"\u003e\n  \u003ctable\u003e\n    \u003cthead\u003e\n      \u003ctr\u003e\n        \u003cth\u003eParameter\u003c\/th\u003e\n        \u003cth\u003eValue\u003c\/th\u003e\n      \u003c\/tr\u003e\n    \u003c\/thead\u003e\n    \u003ctbody\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eModel\u003c\/td\u003e\n        \u003ctd\u003ePOEJK-S4SFP-120\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eSwitch type\u003c\/td\u003e\n        \u003ctd\u003eIndustrial Gigabit Ethernet PoE switch – unmanaged\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eCopper ports\u003c\/td\u003e\n        \u003ctd\u003e4 × 10\/100\/1000 Mbps ports with 802.3af\/at PoE+ (ports 1–4)\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eUplink\u003c\/td\u003e\n        \u003ctd\u003e1 × SFP uplink, 1000Base-X or 100Base-FX (auto detection)\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eCompatible SFPs\u003c\/td\u003e\n        \u003ctd\u003eSFP modules such as SF-SMLC or SF-MMLC (sold separately)\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eData rate\u003c\/td\u003e\n        \u003ctd\u003e10\/100\/1000 Mbps on copper ports\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eInput power\u003c\/td\u003e\n        \u003ctd\u003e12–48 VDC dual redundant inputs\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eOutput\u003c\/td\u003e\n        \u003ctd\u003eUp to 48 VDC output (per manufacturer spec)\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eHousing\u003c\/td\u003e\n        \u003ctd\u003eHigh-strength aluminum, IP40\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eOperating temperature\u003c\/td\u003e\n        \u003ctd\u003e-40°C to +80°C (-40°F to 176°F)\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eMounting\u003c\/td\u003e\n        \u003ctd\u003eDIN-rail, wall or shelf\u003c\/td\u003e\n      \u003c\/tr\u003e\n    \u003c\/tbody\u003e\n  \u003c\/table\u003e\n\u003c\/div\u003e\n\n\u003ch2\u003eIdeal applications\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003eSmall camera clusters or sensor groups that need fibre or SFP uplink back to a core or IDF.\u003c\/li\u003e\n  \u003cli\u003eAccess points and PoE-powered devices at the edge of industrial plants, warehouses or parking lots.\u003c\/li\u003e\n  \u003cli\u003eCompact field enclosures where DC power is available and a few PoE+ ports are sufficient.\u003c\/li\u003e\n  \u003cli\u003eRural or campus sites using fibre backhaul with small PoE+ islands at remote buildings.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eCompatibility \u0026amp; ecosystem\u003c\/h2\u003e\n\u003cp\u003eThe POEJK-S4SFP-120 integrates with GRID’s \u003cstrong\u003ePS48 series DC supplies\u003c\/strong\u003e and SFP modules (SF-SMLC \/ SF-MMLC) to provide an industrial PoE+ node with fibre uplink. It can be deployed alongside larger GRID switches such as the POEJK-S48-740 \/ S48-3600 as a small, remotely powered spur in a broader DC microgrid.\u003c\/p\u003e\n\u003cp\u003eUse standard Cat5e\/Cat6\/Cat6A for device connections and appropriate singlemode or multimode fibre (via SFP) for backhaul, as dictated by the site design.\u003c\/p\u003e\n\n\u003ch2\u003eInstall \u0026amp; design notes\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003ePlan PoE loads carefully across the four PoE+ copper ports, staying within the capabilities of the upstream DC supply and the switch’s design.\u003c\/li\u003e\n  \u003cli\u003eChoose SFP modules (SF-SMLC or SF-MMLC) and fibre types that match your required distances and existing plant.\u003c\/li\u003e\n  \u003cli\u003eUse dual DC inputs where redundancy is required; consider separate feeds or supplies for resilience.\u003c\/li\u003e\n  \u003cli\u003eMount in enclosures that respect the unit’s IP40 rating and provide adequate airflow.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eCanada-ready checklist\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003e✓ Extended temperature range suitable for Canadian mechanical rooms, cold warehouses and sheltered outdoor enclosures (within IP40 limits).\u003c\/li\u003e\n  \u003cli\u003e✓ Ideal for small PoE+ clusters at remote buildings or yard locations tied back via fibre.\u003c\/li\u003e\n  \u003cli\u003e✓ Works with common Canadian fibre and copper cabling practices.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eCompatibility micro Q\u0026amp;A\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eIs the SFP uplink required?\u003c\/strong\u003e\u003cbr\u003e\nFor most designs, yes—the SFP uplink is how you connect the switch back to your main network (using 100Base-FX or 1000Base-X). Choose a compatible SFP module based on your fibre type and distance.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCan I power it from 12 VDC?\u003c\/strong\u003e\u003cbr\u003e\nYes. The input range is \u003cstrong\u003e12–48 VDC\u003c\/strong\u003e. Ensure your supply meets the switch’s power requirements and any PoE load you intend to support.\u003c\/p\u003e\n\n\u003cp\u003e\u003cem\u003eSpecifications are subject to change without notice. Confirm all technical details with the latest GRID documentation before design or tender.\u003c\/em\u003e\u003c\/p\u003e\n","brand":"Grid Networking","offers":[{"title":"Default Title","offer_id":44774159745215,"sku":"POEJK-S4SFP-120","price":204.68,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0410\/6262\/9541\/files\/e6d7fa85-49e1-4424-b94e-8e89f8daa1ae.png?v=1764699088","url":"https:\/\/www.simplycontrolled.ca\/products\/poejk-s4sfp-120","provider":"Simply Controlled","version":"1.0","type":"link"}