Industrial 4-Port PoE+ Edge Switch with Copper Uplink

The POEJK-S4-120 is an industrial Gigabit PoE switch with four PoE+ copper ports and a dedicated copper uplink, designed as a compact, unmanaged edge node for GRID DC microgrid deployments. With dual-redundant 12–48VDC power inputs, 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.

Key features

• Industrial Gigabit PoE switch – unmanaged for simple, robust operation at the edge.
• 4 × 10/100/1000 Mbps PoE+ ports with IEEE 802.3af/at PoE+ injector function on ports 1–4.
• 1 × copper uplink port for connection back to an aggregation or core switch.
• Transmission rate: 10/100/1000 Mbps on all copper interfaces.
• Dual redundant DC power input – compatible with 12–48VDC supplies such as POEJK-PS48-150 / -200 / -240 (sold separately).
• Rugged IP40 aluminum housing built for industrial and light-commercial environments.
• Wide operating temperature: -40°C to +80°C (-40°F to 176°F).
• Flexible mounting – DIN-rail, wall-mount or shelf installation supported.

Technical highlights

Ideal applications

• Small camera or AP clusters at the edge of a site, fed from a DC panel.
• Industrial or warehouse PoE zones inside NEMA-style enclosures (within IP40 limits).
• Remote sheds, shops and outbuildings where 48VDC is distributed as part of a DC microgrid.
• Compact PoE islands feeding Active POE-Jack® in-wall switches and local IP endpoints.

Install & design notes

• Use the four PoE+ ports (1–4) for cameras, APs, sensors or POE-Jack® nodes; reserve the uplink port for backhaul.
• Provide one or two 12–48VDC feeds from compatible supplies (e.g., POEJK-PS48 series) for redundancy.
• Mount on DIN-rail or wall in a ventilated enclosure that respects the unit’s IP40 rating.

*Specifications subject to change. Always verify against the latest GRID documentation before design or tender.