Grid Industrial Gigabit PoE Switch | 4 PoE Downlink Ports + 1 Gigabit Uplink | POEJK-S4-120
Grid Industrial Gigabit PoE Switch | 4 PoE Downlink Ports + 1 Gigabit Uplink | POEJK-S4-120
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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
| Parameter | Value |
|---|---|
| Model | POEJK-S4-120 |
| Switch type | Industrial Gigabit Ethernet PoE switch – unmanaged |
| PoE ports | 4 × 10/100/1000 Mbps with 802.3af/at PoE+ injector function (ports 1–4) |
| Uplink | 1 × 10/100/1000 Mbps copper uplink port |
| Data rate | 10/100/1000 Mbps |
| Input power | Dual redundant 12–48VDC (external supplies sold separately) |
| Housing | High-strength aluminum, IP40 |
| Operating temperature | -40°C to +80°C (-40°F to 176°F) |
| Mounting options | DIN-rail / wall-mount / shelf |
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.
Product Documents
Product Documents
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