Fiber Line · PoE over Fiber
Fiber carries no power — so 'PoE over fiber' is a design pattern, not a cable property. This page sets out the working patterns built from ONV converters, injectors and PoE switches.
The request is universal: a camera on a gate 400 metres away, powered and connected on one design. Fiber solves the data half perfectly and the power half not at all — glass carries no current. So a PoE-over-fiber link is built from parts, and the honest engineering is in choosing which part goes where. ONV's catalogue supplies every element: fiber media converters for the link, PoE injectors to add power, PoE switches at either end, and extenders for the copper tail.
Pattern one — power at the far end, locally: converter at each end, and at the far end a short copper hop through a PoE injector (or a compact PoE switch) powered by a local supply. This suits sites with any far-end power source. Pattern two — the far end is a powered device on a short leash: the converter lands in a cabinet whose PoE switch powers the last ≤100m of copper. Pattern three — no far-end power at all: the link design changes (power is run separately, or the device moves). What we will not do is pretend a converter passes PoE through glass; the configurations above are the real, quotable builds, and our team confirms the exact bill of materials per project against the devices' power classes.
The building blocks: gigabit converters and PoE injectors from the official catalogues.
| Model | Official product name |
|---|---|
| ONV1110-SLX-F | Gigabit 2-port single-mode dual fiber media converter |
| ONV1110-SLX-S4 | Gigabit 5-port single-mode dual fiber media converter |
| ONV1110S-SCX-O-A3 | Gigabit 2-port single-mode single fiber media converter |
| ONV1110-SCX-K | Gigabit 2-port single-mode dual fiber media converter |
| ONV1110-SCX | Gigabit 2-port fiber media converter board |
| ONV-PSE3301DCS | Gigabit PoE injector |
| ONV-PSE3401G | Gigabit single-port BT PoE injector |
| ONV-PSE3101DC | 10/100M 2-port PoE injector |
| ONV-PSE1301AC-60 | Gigabit single-port non-standard PoE injector |
| ONV-PSE1101AC-60 | 10/100M single-port non-standard PoE injector |
The far-end power element: the ONV-PSE3301DCS gigabit PoE injector adds 802.3 af/at power (30W) to a copper port — paired with a converter at the far end, it powers the camera on the last short hop.
| Parameter | Datasheet value |
|---|---|
| PoE port | 1 × 10/100/1000M PoE port (data + power) |
| Standard | IEEE 802.3 af/at |
| Max power per port | 30W |
| Power pins | 1/2 (+), 3/6 (-) |
| Power supply | External adapter, AC100–240V 50–60Hz |
| Dimensions | 104 × 50 × 29 mm |
Start from the far end: what devices, what total watts, and is there any local power (even a lighting circuit)? With local power, pattern one is cheapest and simplest. Without it, the design conversation is about power delivery, not networking — say so in the inquiry and we will spec the whole build, converters and power side together. Keep the far-end copper tail under 100m and inside the injector's or switch's PoE budget.
Gate and perimeter cameras, remote APs, parking and barrier systems, distant outbuildings — any powered device at the end of a fiber run.
Combination units exist in the industry, but in the ONV catalogue the function is delivered as a build — converter plus injector or compact PoE switch — which keeps every element standard, stocked and replaceable. We quote it as one configuration.
Whatever the far-end power element supplies: 30W per port from an af/at injector, more with a compact bt-capable switch. The fiber link itself imposes no power limit — it carries none.
Send your port count, per-port power and uplink requirements — we reply with the exact models, datasheets and a quotation. MOQ and lead time are confirmed per model and order scope in the quotation.
Complete camera-system builds.