But how does one test and troubleshoot hybrid copper-fiber cables delivering non-PoE Class 2 power? When it comes to installing hybrid copper-fiber cable, the fiber portion of the link is certified as any fiber cable would be via Tier 1 or Tier 2 testing (click HERE for more on that). For the power, it is recommended to carefully plan up front since deploying a Class 2 circuit needs to consider voltage drop (between source and device), distance, conductor size (AWG) and power requirements of the end device.
According to manufacturers like Corning, pre-planning is critical to ensure enough power to support a device based on its current draw and distance from the power source. Once the network is live, continuity, power and length can easily be measured using a digital multimeter in the event that a device doesn’t boot up. If there is no continuity due to physical damage, the location of that damage can then be pinpointed using a Fluke Networks’ Pro3000™ Tone and Probe. However, if pre-planning was flawed and the distance was too great or conductor size too small to support the power needs of the end device, there is little that can be done other than replacing the cable with a larger conductor size, shortening the distance of the circuit, or swapping out the end device for something that requires less power (none of which are ideal).
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