{"product_id":"grid-industrial-gigabit-poe-switch-4-poe-downlink-ports-1-gigabit-uplink-poejk-s4-120","title":"Grid Industrial Gigabit PoE Switch | 4 PoE Downlink Ports + 1 Gigabit Uplink | POEJK-S4-120","description":"\u003ch2\u003eIndustrial 4-Port PoE+ Edge Switch with Copper Uplink\u003c\/h2\u003e\n\u003cp\u003eThe \u003cstrong\u003ePOEJK-S4-120\u003c\/strong\u003e is an \u003cstrong\u003eindustrial Gigabit PoE switch\u003c\/strong\u003e with \u003cstrong\u003efour PoE+ copper ports\u003c\/strong\u003e and a dedicated copper uplink, designed as a compact, unmanaged edge node for GRID DC microgrid deployments. With \u003cstrong\u003edual-redundant 12–48VDC power inputs\u003c\/strong\u003e, extended temperature operation and flexible DIN-rail \/ wall \/ shelf mounting, it's a natural fit for small PoE clusters in enclosures, mechanical rooms and remote outbuildings.\u003c\/p\u003e\n\n\u003ch3\u003eKey features\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eIndustrial Gigabit PoE switch – unmanaged\u003c\/strong\u003e for simple, robust operation at the edge.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e4 × 10\/100\/1000 Mbps PoE+ ports\u003c\/strong\u003e with \u003cstrong\u003eIEEE 802.3af\/at PoE+ injector function on ports 1–4\u003c\/strong\u003e.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e1 × copper uplink port\u003c\/strong\u003e for connection back to an aggregation or core switch.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTransmission rate:\u003c\/strong\u003e 10\/100\/1000 Mbps on all copper interfaces.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDual redundant DC power input\u003c\/strong\u003e – compatible with \u003cstrong\u003e12–48VDC\u003c\/strong\u003e supplies such as POEJK-PS48-150 \/ -200 \/ -240 (sold separately).\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRugged IP40 aluminum housing\u003c\/strong\u003e built for industrial and light-commercial environments.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWide operating temperature:\u003c\/strong\u003e \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 – \u003cstrong\u003eDIN-rail\u003c\/strong\u003e, \u003cstrong\u003ewall-mount\u003c\/strong\u003e or \u003cstrong\u003eshelf\u003c\/strong\u003e installation supported.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eTechnical highlights\u003c\/h3\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-S4-120\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\u003ePoE ports\u003c\/td\u003e\n\u003ctd\u003e4 × 10\/100\/1000 Mbps with 802.3af\/at PoE+ injector function (ports 1–4)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eUplink\u003c\/td\u003e\n\u003ctd\u003e1 × 10\/100\/1000 Mbps copper uplink port\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eData rate\u003c\/td\u003e\n\u003ctd\u003e10\/100\/1000 Mbps\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInput power\u003c\/td\u003e\n\u003ctd\u003eDual redundant \u003cstrong\u003e12–48VDC\u003c\/strong\u003e (external supplies sold separately)\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 options\u003c\/td\u003e\n\u003ctd\u003eDIN-rail \/ wall-mount \/ shelf\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\n\u003ch3\u003eIdeal applications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eSmall \u003cstrong\u003ecamera or AP clusters\u003c\/strong\u003e at the edge of a site, fed from a DC panel.\u003c\/li\u003e\n\u003cli\u003eIndustrial or warehouse PoE zones inside NEMA-style enclosures (within IP40 limits).\u003c\/li\u003e\n\u003cli\u003eRemote sheds, shops and outbuildings where \u003cstrong\u003e48VDC\u003c\/strong\u003e is distributed as part of a DC microgrid.\u003c\/li\u003e\n\u003cli\u003eCompact PoE islands feeding \u003cstrong\u003eActive POE-Jack®\u003c\/strong\u003e in-wall switches and local IP endpoints.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eInstall \u0026amp; design notes\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eUse the four PoE+ ports (1–4) for cameras, APs, sensors or POE-Jack® nodes; reserve the uplink port for backhaul.\u003c\/li\u003e\n\u003cli\u003eProvide one or two \u003cstrong\u003e12–48VDC\u003c\/strong\u003e feeds from compatible supplies (e.g., POEJK-PS48 series) for redundancy.\u003c\/li\u003e\n\u003cli\u003eMount on DIN-rail or wall in a ventilated enclosure that respects the unit's \u003cstrong\u003eIP40\u003c\/strong\u003e rating.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e\u003cem\u003e*Specifications subject to change. Always verify against the latest GRID documentation before design or tender.\u003c\/em\u003e\u003c\/p\u003e","brand":"Grid Networking","offers":[{"title":"Default Title","offer_id":48145210966179,"sku":"ozo1789515303836","price":67.42,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0762\/3114\/7683\/files\/grid-industrial-gigabit-poe-switch-4-poe-downlink-ports-1-gigabit-uplink-poejk-s_1.png?v=1789515307","url":"https:\/\/seersuckerwear.shop\/products\/grid-industrial-gigabit-poe-switch-4-poe-downlink-ports-1-gigabit-uplink-poejk-s4-120","provider":"My Store","version":"1.0","type":"link"}