PoE Devices · Injector
A switch upgrade for one camera is waste. A PoE injector adds standards-based power to a single existing port — gigabit, 802.3 af/at, and bt-class models for high-power devices.
The PoE injector (midspan) sits between a non-PoE switch port and one powered device, adding power to the cable while passing data through untouched. It is the right answer in three recurring situations: one or two powered devices on an existing non-PoE network; a high-power device (a bt-class PTZ) on a switch whose ports are af/at; and the far end of a fiber link, where the injector supplies the power the fiber cannot (see the PoE media converter page).
ONV's injector models sit in the 20-model PoE Devices catalogue: gigabit single-port injectors at 30W (802.3 af/at), bt single-port models, and non-standard high-power variants for legacy devices. The featured model's datasheet is typical: one gigabit PoE port out, 30W, standard pinout, external adapter, a 104 × 50 × 29 mm body that disappears into a cabinet.
Injector models from the PoE Devices catalogue (official product names).
| Model | Official product name |
|---|---|
| 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 |
| ONV-PSE3501G | Gigabit Single-port BT PoE Injector |
| ONV-PSE3301DC | 2-port Gigabit PoE injector |
| ONV-PSE3301AC | Gigabit single port PoE injector |
The ONV-PSE3301DCS in full: a gigabit PoE port delivering 30W of IEEE 802.3 af/at power, external AC adapter, desktop dimensions — the standard midspan pattern.
| 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 |
Count the devices first: at three or more powered devices, a small PoE switch usually beats a row of injectors on cost, cabling and tidiness. Below that, injectors win. Match the injector's class to the device (af/at for most, bt for high-power), and mind the data rate — the injector must be gigabit if the link is. Non-standard injectors exist for legacy 24V-class devices; keep those segregated and labelled, because non-standard power on the wrong device is how hardware dies.
Single camera or AP additions, bt power for one PTZ on an at network, far-end power on fiber links, test benches and temporary installations.
The crossover is around three devices, or sooner if the devices cluster in one cabinet. One device, or devices in different places: injectors. A growing cluster: the switch.
A matched-rate injector is transparent at line rate. A 10/100M injector on a gigabit link would cap it — match the rates.
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.
The full comparison.
Injectors at the far end.
