Altronix NETWAYSP2BTWP 2-Port 802.3BT PoE++ Power Supply and Injector
Overview
The Altronix NETWAYSP2BTWP is a hardened 2-port 802.3BT (4-pair PoE) power supply and midspan injector engineered for high-demand outdoor and industrial surveillance deployments. Housed in a NEMA 4/4X, IP66-rated steel enclosure, it delivers up to 90W per port and 240W total — enough headroom to drive a pair of pan-tilt-zoom cameras, multi-sensor panoramic units, or access control panels that would stall a standard PoE+ switch. If you're specifying power for edge devices that routinely push past the 30W ceiling of 802.3at, this is the unit to evaluate.
The NETWAYSP2BTWP accepts both 115VAC/60Hz and 230VAC/50-60Hz input, making it field-deployable across North American and international sites without an external transformer. Its single 1Gb SFP fiber port lets you extend the network link over long fiber runs before injecting high-wattage PoE at the endpoint — a topology that keeps copper within the 100m spec while pushing the uplink as far as the fiber plant allows. Browse the full Altronix surveillance power line for complementary midspans, panels, and enclosures.
Key Features
- 90W Per Port, 802.3BT (4PPOE) Compliance: True 802.3BT delivery uses all four pairs of CAT5e — not the two-pair workaround of 802.3at. Each of the two output ports can sustain 90W continuously, so a high-end PTZ or a PTZ camera with integrated heater/blower draws what it needs without forcing you to add a separate power tap.
- 240W Total Output at 56VDC: The 56VDC output rail and 6.4A continuous current rating keep both ports fully loaded simultaneously. At 240W aggregate, you have margin — both ports can run at 90W with 60W headroom — without triggering thermal derating in normal conditions.
- Temperature-Derated Power Ratings: Altronix publishes three operating bands: 60W operation holds to -40°C–75°C; 80W to -40°C–70°C; 90W ceiling requires -40°C–60°C ambient. If you're mounting in an unshaded rooftop cabinet in a hot climate, plan around 80W maximum to keep the enclosure temperature inside spec.
- NEMA 4/4X, IP66-11 Enclosure: The steel enclosure is rated for hose-directed water, windblown dust, and corrosion — suited for outdoor IP camera installations at building perimeters, loading docks, and parking structures where a standard 1U rack unit would corrode or flood. NEMA 4X adds corrosion resistance over base NEMA 4.
- 1Gb SFP Fiber Uplink: The single gigabit SFP port accepts standard LC or SC fiber transceivers, letting you run a fiber backbone to a central IDF and inject full 802.3BT power at the camera cluster — a clean solution for campus perimeter runs that exceed copper distance limits.
- 10/100/1000 Mbps RJ45 Data with Auto-Crossover: The RJ45 output ports auto-negotiate speed and crossover, so you can connect directly to cameras or switches without worrying about cable type. 1Gbps throughput keeps high-bitrate 4K and multi-sensor streams moving without bottlenecking the link.
- Battery Backup Compatibility — LiFePO and SLA/Gel: The onboard 24VDC/0.75A charging circuit supports LiFePO chemistry as well as four sealed lead-acid or gel cells. Integrating a battery pack turns this unit into a UPS node — critical for outdoor PTZ positions where a brief power outage would otherwise drop camera coverage during an incident.
- Wide Operating Altitude: Rated from -304.8m to 2,000m above sea level — relevant for high-elevation mountain sites, data centers in elevated facilities, and underground parking structures where air density affects thermal performance of conventional units.
- Dual-Voltage AC Input: 115VAC/60Hz at 2.5A or 230VAC/50-60Hz at 1.3A input, protected by a 5A/250V fuse. A single SKU covers both domestic and international installations — no need to stock separate part numbers for international projects.
Integration and Compatibility
The NETWAYSP2BTWP is fully backward-compatible with 802.3af and 802.3at powered devices — standard PoE and PoE+ cameras, access readers, and VoIP endpoints all negotiate correctly at their rated power levels. The SFP uplink integrates into any managed or unmanaged network switch with an available fiber port. The unit carries CE agency listing. Pair with an appropriate SFP transceiver matched to your fiber type and distance; the NETWAYSP2BTWP does not include a transceiver in the base package.
For multi-camera deployments requiring more than two high-wattage ports, this unit can be paralleled with additional PoE power supplies in the same enclosure rack or distribution panel — Altronix's enclosure ecosystem supports ganged configurations.
Frequently Asked Questions
Q: What is the maximum wattage the NETWAYSP2BTWP can deliver per port?
A: Each output port supports up to 90W under 802.3BT (4-pair PoE) at ambient temperatures up to 60°C. At higher ambient temperatures the maximum drops — 80W up to 70°C, 60W up to 75°C. Total system output is capped at 240W across both ports.
Q: Does the NETWAYSP2BTWP work with standard PoE and PoE+ cameras, or only 802.3BT devices?
A: Yes. The unit is backward-compatible with 802.3af (PoE) and 802.3at (PoE+) powered devices in addition to 802.3BT. It auto-negotiates to the correct power level for each connected device.
Q: Is an SFP transceiver included with the NETWAYSP2BTWP?
A: The SFP port accepts standard 1Gb transceivers, but you must specify and procure the transceiver separately based on your fiber type (single-mode or multi-mode) and run distance. The base unit ships without a transceiver installed.
Q: Can the NETWAYSP2BTWP support a battery backup for power outage protection?
A: Yes. The unit includes a 24VDC/0.75A charging circuit compatible with LiFePO batteries and up to four sealed lead-acid or gel-type cells, allowing you to integrate a battery pack for UPS-style operation at the camera node.
Q: What enclosure rating does the NETWAYSP2BTWP carry for outdoor installation?
A: The steel enclosure is rated NEMA 4/4X and IP66-11, meaning it is protected against hose-directed water, windblown dust, and corrosion. This makes it suitable for exposed outdoor mounting on building exteriors, parking structures, and industrial perimeters.
Q: What input voltages does the NETWAYSP2BTWP support?
A: The unit accepts 115VAC/60Hz (2.5A) or 230VAC/50-60Hz (1.3A), covering both North American and international mains voltages from a single SKU. Input is fuse-protected at 5A/250V.
The NETWAYSP2BTWP sits in a specific niche that not many midspan units fill: true 802.3BT at 90W per port, inside a NEMA 4X enclosure, with an SFP uplink for fiber backbone integration. That combination answers a real gap on large-campus perimeter designs where the switch is 300m away, the PTZ needs 70W+, and the cabinet lives outside year-round in weather that would destroy a standard 1U shelf unit.
Technical Highlights:
- 90W Per Port / 240W Total: At 56VDC output and 6.4A continuous, both ports can be fully loaded simultaneously — a 180W real load still leaves 60W of headroom before you hit the aggregate ceiling. This matters when both cameras are running heaters in winter.
- Three Thermal Operating Bands: Altronix documents 60W/-40°C–75°C, 80W/-40°C–70°C, and 90W/-40°C–60°C bands explicitly. On a black steel enclosure in direct summer sun, internal temperature can run 15–20°C above ambient — design for 80W maximum if the cabinet is unshaded.
- LiFePO + SLA Battery Compatibility: The 24VDC/0.75A charging circuit handles both LiFePO chemistry and conventional sealed lead-acid or gel cells. LiFePO is the right call for outdoor nodes — better cycle life in temperature-cycling environments and no sulfation risk on partial-state-of-charge operation.
Deployment Considerations:
- The SFP port requires a separately sourced transceiver — specify single-mode or multi-mode before ordering and confirm the transceiver's power budget matches your fiber run length. A mismatch here is a common commissioning delay on campus perimeter projects.
- NEMA 4X covers corrosion and hose-directed water, but the enclosure dimensions (13.31" × 11.31" × 5.59") require a mounting surface that can carry 10.5 lb plus battery weight — verify the pole arm or wall bracket load rating before the installer shows up on site.
This unit is a strong fit for outdoor PTZ clusters on university campuses, sports venues, and industrial perimeter fencing where fiber runs the backbone, high-wattage cameras are the endpoint, and the power node needs to survive unattended in a weatherproof cabinet for years without maintenance visits.
