United States
Q
What is a Ubiquiti PoE module?
A
A Ubiquiti PoE module is a power injector that delivers Power over Ethernet to compatible Ubiquiti devices, combining data and DC power on a single Ethernet cable.
Q
How does Ubiquiti passive PoE differ from 802.3af/at PoE?
A
Ubiquiti passive PoE provides a fixed 24 V or 48 V output without power negotiation, while 802.3af/at automatically negotiates up to 15.4 W or 30 W at 48 V for standards-compliant devices.
Q
Do Ubiquiti PoE modules support Gigabit Ethernet?
A
No. Ubiquiti’s passive PoE injectors are limited to 10/100 Mbps. For Gigabit PoE, use an 802.3af/at-compliant switch or third-party injector that supports 1000 Mbps.
Q
How do I choose the right Ubiquiti PoE module for my device?
A
Match the module’s voltage (24 V or 48 V) and wattage rating to your device’s specifications, ensuring the injector’s maximum wattage meets or exceeds the device’s power draw.
Q
What is the maximum cable length for a Ubiquiti PoE module?
A
The maximum recommended Ethernet cable length is 100 meters (328 feet) using Cat5e or higher, beyond which voltage drop may cause insufficient power delivery.
Q
Can I use Ubiquiti PoE modules with non-Ubiquiti devices?
A
Yes—provided the device supports the same passive voltage and polarity. For 802.3af/at PoE standards, any compliant device will work interchangeably.
Q
What do the LED indicators on a Ubiquiti PoE injector mean?
A
A solid green LED indicates proper power and data delivery; no LED or a red LED signals an error or insufficient input voltage from the AC adapter.
Q
How do I install a Ubiquiti PoE module?
A
Plug the injector’s DC input into the included AC adapter, connect the LAN port to your network switch, then connect the PoE port to your Ubiquiti device using standard Ethernet cable.
Q
How can I troubleshoot a PoE device that won’t power on?
A
Verify the injector’s LED status, confirm correct voltage and polarity, test the AC adapter output, and ensure your Ethernet cable is Cat5e or higher and under 100 m.
Q
Are Ubiquiti PoE modules protected against power surges?
A
Yes. Ubiquiti passive PoE injectors include basic surge protection and over-current circuitry to safeguard both the injector and connected device.
Q
What are the power specifications for the POE-24-12W and POE-48-24W modules?
A
POE-24-12W delivers 24 V DC at up to 0.5 A (12 W), while POE-48-24W delivers 48 V DC at up to 0.5 A (24 W) over the Ethernet cable.
Q
Can Ubiquiti PoE modules power high-powered devices like airMAX or UniFi XG?
A
You can power mid-range devices up to the module’s wattage limit; for high-power devices exceeding 24 W, use a Ubiquiti PoE switch or a higher-wattage 802.3at injector.
Q
Is it possible to daisy-chain Ubiquiti PoE modules?
A
No. Daisy-chaining injectors is not supported. Each PoE-powered device requires its own dedicated injector or a PoE switch with sufficient port count.
Q
How do I verify voltage and current delivery on a Ubiquiti PoE link?
A
Use a PoE tester or multimeter on the injector’s output pins to measure DC voltage and confirm current draw does not exceed the module’s rated capacity.
Q
How can I extend the PoE range beyond 100 meters?
A
Deploy a PoE extender or midspan repeater designed for passive or 802.3af/at applications to boost signal and power past the 100 m Ethernet limit.
Q
What best practices ensure safe operation of Ubiquiti PoE modules?
A
Use only manufacturer-approved adapters, maintain proper cable lengths, avoid water exposure, and ensure adequate ventilation around the injector to prevent overheating.
