Altronix EBRIDGE100SPR 56VDC/60W Ethernet Over Coax Receiver
The EBRIDGE100SPR is a 56VDC/60W Ethernet over coax receiver engineered to extend both power and data transmission across existing coaxial cable runs — eliminating the need to install new copper or fiber when upgrading from analog surveillance to IP cameras. Paired with an Altronix injector on the upstream end, this receiver converts a single coax line into a PoE delivery pipe capable of reaching equipment 300 meters away, making it a practical retrofit strategy for facilities with established coaxial backbone infrastructure.
Key Features
- 56VDC output (51–56VDC range): Delivers steady high-voltage power over coax without voltage sag across long cable runs. The 56VDC nominal level ensures reliable operation for demanding IP PTZ cameras, multi-sensor systems, and edge compute devices that require stable 48V+ input — a real advantage over conventional 24VAC or PoE when distance exceeds 100 meters.
- 60W PoE power budget per port: Enough to power a full-sized PTZ dome, multiple fixed cameras via a managed switch, or a combination of IP cameras and auxiliary equipment (strobes, heaters, fans) at the remote end without overloading the receiver or the injector.
- 300-meter maximum transmission range: Coax cable exhibits lower attenuation than Ethernet twisted pair at these power levels. A 300m reach means you can place cameras, access control readers, or intercoms in buildings, parking structures, or perimeter enclosures far from the main equipment room — useful in campuses, large warehouses, and multi-building sites where trenching new cable is expensive or infeasible.
- Single output connector: Streamlined design with one output port. If you need to split power to multiple endpoints, add a managed PoE switch at the receiver output to maintain voltage regulation and prevent branch-level failures from affecting the entire run.
- Ethernet over coax conversion: The EBRIDGE100SPR handles bidirectional Ethernet traffic (IP video, control commands, audio) and DC power on the same coax conductor pair, minimizing cable congestion in conduits and cable trays. Pairs seamlessly with Altronix injectors to form a complete point-to-point extension link.
- Lifetime Limited Warranty: Reflects design confidence and simplifies long-term cost-of-ownership calculations for retrofit projects where replacement turnaround is a factor.
Integration & Compatibility
The EBRIDGE100SPR operates as a receiver-only device; it requires a matching Altronix EBRIDGE injector upstream to encode Ethernet and power onto the coax line. The receiver is agnostic to camera brand — any IP camera or PoE device rated for 48V or 56V input will work downstream. For multi-device deployments, place a managed PoE switch at the EBRIDGE100SPR output to distribute power fairly and permit independent camera resets or power cycling without affecting the entire coax run. This architecture is common in retrofit scenarios where the coax backbone exists but the camera count and power demand exceed a single 60W allocation.
When to Choose a Different Model
If your facility already has structured Ethernet cabling in place and distance is under 100 meters, standard PoE injectors and switches eliminate the need for Ethernet-over-coax conversion. If you require multi-point power distribution (more than one receiver on a single coax line) or redundancy, explore higher-capacity Altronix power distribution or UPS-backed backup power systems in the same family. For extremely remote or harsh outdoor environments where moisture ingress into coax connectors is a concern, verify that your coax terminations and junction boxes meet the same IP rating as your cameras.
Typical Deployment Scenario
A warehouse or distribution center has legacy analog CCTV running on a well-maintained coax backbone, but management requires IP-based video analytics and 24/7 recording at a centralized NVR. Rather than trench new Ethernet to every camera location, integrate an EBRIDGE100SPR at each zone's receiver point. Pair each receiver with a small managed PoE switch to feed multiple IP domes or turrets at that zone, bridging the analog-era infrastructure to modern IP security architecture without major capital expense.
Frequently Asked Questions
Q: Does the EBRIDGE100SPR carry IP video and control data over the same coax pair as power?
A: Yes. The Ethernet-over-coax technology multiplexes data and 56VDC power on the same conductor pair, so you need only one coax run between the injector and receiver. Data flows bidirectionally, supporting live video, PTZ commands, and two-way audio.
Q: What cable type and gauge do I need for a 300-meter run?
A: RG-6 or RG-11 coaxial cable is typical. Thicker gauge (RG-11) is recommended for runs exceeding 200 meters to minimize DC voltage drop. Consult the datasheet for specific attenuation curves relative to your coax type and distance.
Q: Can I daisy-chain multiple EBRIDGE100SPR receivers on one coax line?
A: No. The EBRIDGE100SPR is designed for point-to-point links — one injector to one receiver. For multi-site coax extension, deploy separate injector–receiver pairs on independent coax runs.
Q: Is the EBRIDGE100SPR suitable for outdoor mounted cameras?
A: The receiver itself is designed for indoor installation near the camera location. Ensure all coax connectors and outdoor termination points are weatherproofed and properly grounded to prevent lightning strike damage and moisture ingress.
Q: What happens if I exceed the 60W power budget?
A: The EBRIDGE100SPR has no internal current limiting; exceeding 60W will cause voltage sag and may damage downstream equipment or trip the injector's protection circuit. Calculate the wattage of all devices at the remote end and stay under 60W; if you need more, add a second coax run with its own injector–receiver pair.
Q: Does the EBRIDGE100SPR include any terminating resistors or DC blocking capacitors?
A: Refer to the datasheet for wiring specifics. Proper termination of the coax pair at both ends is critical to minimize reflections and signal loss, especially at 300-meter distances.
Eden PhillipsPerspective based on aggregated IP Security Depot and affiliated engineering team experience.
The EBRIDGE100SPR fills a specific and valuable niche: retrofitting analog-era coax infrastructure for modern IP deployments without massive cable replacement. If you're managing a multi-building campus or warehouse cluster where coaxial runs are already buried or routed through conduit, this receiver lets you leverage that investment instead of starting from scratch with Ethernet cabling. The 56VDC output and 60W budget are the technical levers that make this work — they're high enough to overcome coax attenuation and deliver stable power to demanding equipment over 300 meters.
Technical Highlights:
- 56VDC nominal output: Substantially higher than 24VAC or standard PoE, which means lower current and therefore lower resistive loss in aging or non-ideal coax conductors. On a 300-meter RG-6 run, this matters — you'll see less voltage sag at the camera end than you would with lower-voltage alternatives.
- 60W power budget: Covers a single 4K PTZ dome (typically 40–50W), or a cluster of three to four fixed IP domes running concurrently. Enough for most single-site retrofit scenarios, but forces hard choices if you want multiple power-hungry devices at the remote end.
- Bidirectional Ethernet over coax: Not just power — the EBRIDGE100SPR and its paired injector handle full-duplex IP traffic (video, audio, control, NTP synchronization) on the same cable. That's a real simplification compared to older serial-over-coax schemes that required separate control lines.
Deployment Considerations:
- Coax quality matters: A 300-meter run of degraded RG-59 will produce voltage sag and data errors that you won't see on a clean RG-11 run of the same length. If the existing coax is original installation (15+ years), consider a test run or acceptance testing before committing to wholesale replacement of your analog cameras.
- Injector dependency: The EBRIDGE100SPR is half of a system; a failed or undersized injector upstream will look like a receiver problem. Size and provision the injector for your camera mix, and ensure both devices are on the same circuit or backed by the same UPS if uptime is critical.
- Impedance and reflections: Proper coax termination (usually 75 ohms) at both the injector and receiver end is essential on runs over 150 meters. Loose or corroded connectors introduce reflections that degrade both Ethernet and power delivery. Budget for a termination audit if the coax is old.
Deploy the EBRIDGE100SPR in warehouse or multi-building campus retrofit scenarios where new Ethernet cabling is cost-prohibitive and the existing coax backbone is sound. Avoid it if you're building new infrastructure from scratch — standard PoE switches and Cat6A cabling are simpler, have lower total cost of ownership, and avoid the injector–receiver pairing overhead. For analog-to-IP transition projects on established facilities, this receiver justifies its place in the bill of materials.
