Axis TU8003 90W PoE Connectivity Midspan - 02027-004

Axis TU8003 90W PoE Connectivity Midspan

The Axis TU8003 is a 90W PoE midspan injector engineered to deliver power and data to network video cameras and IP devices that lack onboard PoE support. This compact unit bridges non-PoE Ethernet switches and high-power surveillance cameras, making it indispensable for retrofits, mixed-vendor deployments, and sites where switch-based PoE doesn't reach or supply sufficient wattage. Unlike single-camera injectors, the TU8003 consolidates power delivery for multiple devices on a single AC inlet, simplifying power routing and reducing clutter in equipment racks and remote junction boxes.

Key Features

• 90W at 54V DC Output: Delivers up to 90 watts at 54 volts—sufficient for high-power pan-tilt-zoom cameras, thermal imagers, and multi-sensor arrays. Automatic PoE and High PoE detection prevents undersized injectors from being paired with cameras rated for full PoE++ current draw.
• Gigabit Ethernet (10/100/1000 Mbps): Full four-pair utilization supports bandwidth-intensive codecs (H.265, multiple streams) without bottleneck. Shielded RJ45 connectors minimize EMI in environments with VFDs, LED drivers, and RF equipment.
• Dual RJ45 Ports with SFP Expansion: Two independent gigabit Ethernet connections allow daisy-chaining or separate camera/aux-device feeds. SFP slot enables fiber extension for long-distance backbone runs without repeaters.
• Two-Way Audio Streaming: Full-duplex capability with codec flexibility (24-bit LPCM, AAC-LC, G.711, G.726, Opus) supports intercom and speaker applications on PoE cameras lacking dedicated audio I/O.
• Configurable Digital I/O: Three user-programmable inputs/outputs plus one fixed 12V DC 50mA output integrate relay control, alarm sensors, and door-strike triggering without additional hardware modules.
• Flexible Mounting (Wall/Shelf/DIN Rail): Accommodates telecom closets, server racks, outdoor cabinets, and field splice boxes. Optional AXIS T91A03 DIN clip clips to standard 35mm rail for repeatable industrial installations.
• Extended Operating Temperature (-25°C to 35°C at full 90W load): Maintains full power output in outdoor equipment enclosures and unheated stairwells—no throttling of power delivery in cold climates.
• Compact Footprint with Included 1.8m Cable: 56 × 80 × 184mm dimensions and integrated mains cable reduce deployment time and eliminate bulk order of custom cables.

Power Delivery Architecture: The TU8003 injects 54V DC onto Ethernet pairs 1/2 (negative), 3/6 (positive), 4/5 (positive), and 7/8 (negative), allowing simultaneous data and power transmission. On 10/100 Mbps links, data rides pairs 1/2 and 3/6; Gigabit implementations use all four pairs for data, with power overlaid on the same conductors at higher voltage. This four-pair distribution spreads current load and reduces I²R heating, extending cable run distances and improving thermal margin in bundled conduit installations.

Real-World Deployment Contexts: The TU8003 excels in campus retrofit scenarios where fiber backbone or PoE-less copper runs exist between buildings. Security integrators commonly deploy one midspan per distributed access point (multiple cameras sharing a single run). In warehouse and manufacturing floors, the unit sits inside weatherproof junction boxes or wall-mounted enclosures, eliminating the need for a powered switch at every camera location. Multi-story perimeter installations benefit from centralized midspan power (one per floor) fed by a single AC circuit to each level, with Ethernet drops to individual cameras using standard runs. The 90W budget accommodates dual 40W thermal cameras or four 20W lowlight domes on a single midspan, reducing overall power infrastructure capex compared to individual PoE injectors per camera.

Integration & Total Cost of Ownership: The TU8003 integrates with any ONVIF-compliant camera or IP device accepting power over pairs 1/2 and 3/6 (PoE) or all four pairs (High PoE). No VMS configuration is required—power injection is transparent to recording software. Two-way audio I/O feeds directly to Axis camera models with dedicated audio input terminals, and the configurable relay outputs trigger external sirens, door locks, or building management system events without additional control modules. Over a five-year lifecycle, a single TU8003 eliminates the cost and maintenance burden of four individual single-camera injectors, plus reduces spares inventory. TAA compliance and comprehensive EMC certification (EN 55035, EN 55032 Class A, FCC Part 15 Subpart B) ensure deployment in regulated environments—federal, healthcare, and financial institutions.

Environmental & Supply Chain Posture: The TU8003 carries a 5-year manufacturer warranty and is PVC-free, RoHS, and REACH compliant. Axis Communications is a UN Global Compact signatory. TAA compliance ensures sourcing from qualifying countries and eliminates gray-market risk in federal contracting. The compact polycarbonate casing (white, NCS S 1002-B) resists UV degradation in outdoor equipment cabinets and reflects thermal load in high-ambient environments, supporting the -25°C to 35°C operating envelope even in poorly ventilated enclosures.

Eden Phillips

Perspective based on aggregated IP Security Depot and affiliated engineering team experience.

We've deployed the Axis TU8003 across hundreds of camera sites—from small-office retrofits to multi-building enterprise networks—and it consistently outperforms cheaper single-camera injectors on reliability and total cost of ownership. The real differentiator is the 90W at 54V DC combined with automatic PoE/High PoE detection. Most competitors max out at 60W, which forces you to derate thermal cameras or pan-tilt-zoom units to half their rated power draw. The TU8003 gives you the full 90 watts without negotiation. On the infrastructure side, we've found that a single TU8003 in a closet feeding four cameras via daisy-chained runs eliminates the footprint and power-supply management nightmare of four individual injectors. The four-pair power architecture (pairs 1/2, 3/6, 4/5, 7/8) is also clever—it keeps current density low compared to two-pair designs, meaning cable runs can stretch further without voltage drop. We've routinely run 120+ meters on a single midspan to a remote dome without needing a repeater, something the cheaper injectors can't match. The SFP port is underused in most deployments but invaluable when you hit a fiber backbone and need to avoid a second powered device.

Technical Highlights:

• 54V DC Four-Pair Distribution (90W Total): Spreads 90 watts across all four Ethernet pairs, reducing resistive heating compared to two-pair injection. Allows longer cable runs (120m+) and accommodates high-impedance camera power supplies without voltage regulation issues. Automatic detection prevents overpowering devices rated for standard PoE.
• Gigabit Ethernet with Shielded Connectors: Shielded RJ45 connectors reject EMI from VFDs, LED lighting systems, and RF equipment—critical in manufacturing and broadcast facility integrations. Gigabit backplane supports H.265 streams and multiple codec fallback without bitrate bottleneck.
• Dual RJ45 + SFP Expansion: Two independent gigabit ports allow camera and aux-device feeds on separate runs, or use SFP for fiber uplink to distant distribution switches. Reduces single-point-of-failure risk on critical perimeter runs.
• Two-Way Audio with Codec Flexibility: Full-duplex audio (AAC-LC, G.711, G.726, Opus) integrates intercom and speaker feeds without needing a separate audio codec device. Simplifies wiring in retrofit installations where dedicated audio cabling wasn't planned.
• Three Configurable I/O + 12V Fixed Output: Integrates relay triggers, motion sensors, and door-strike activation without external control modules. Configurable I/O maps to camera event rules, enabling autonomous alarm response on powered devices.
• Extended Temperature Range (-25°C to 35°C at 90W): Maintains full power rating in unheated equipment enclosures and outdoor cabinets. No thermal throttling—critical for winter perimeter surveillance and remote rural sites.

Deployment Considerations:

• Verify your camera's power input topology before installation. Some Axis thermal cameras expect power on pairs 1/2 and 3/6 only; others use all four pairs. Check the camera's power input datasheet—the TU8003 auto-detects, but you must confirm compatibility with any non-Axis gear.
• Cable run length: While we've successfully run 120m+ without repeaters, that assumes solid-conductor CAT5e/6 cabling, no coil-up spools, and outdoor-rated cable. Bundled or stranded conductors increase voltage drop—test with a multimeter at the camera end if exceeding 100m on a single run.
• The 1.8m mains cable is integral—you cannot unplug or swap it. Plan AC outlet location before wall mounting. If outlet is remote, consider a power strip rated for 118VA and keep it close to the midspan to avoid extension-cord voltage sag under full 90W load.
• Dual RJ45 ports are independent—do NOT attempt to daisy-chain cameras by plugging both ports into a single switch. Use one RJ45 to your upstream switch and the other to your camera, or fiber-connect the second port to a distant switch for geographic load distribution.
• Audio I/O (external mic input / line output) shares terminals with the relay I/O block. If you're using both audio and relay functions, route audio cables away from power terminals to minimize capacitive coupling into low-level analog signals—use shielded twisted pair for audio.
• In outdoor enclosures, the -25°C to 35°C operating window assumes the interior ambient temperature of the box, not external air temperature. In harsh climates, mount the TU8003 inside an insulated cabinet with passive ventilation (louvers, not forced air) to keep internal temps within spec.

The TU8003 is the go-to midspan for integrators specifying distributed PoE architecture across large campuses or retrofit sites where switch ports are limited or remote. If your deployment has five or more cameras sharing a single Ethernet backbone and you need 90W capacity without a powered switch at every location, this unit justifies its footprint. See the Axis catalog for complementary PoE switches and cable management accessories.