The voltage of the centralized power supply usually defaults to 12V, so the output power depends on the current, and the range is 20A, 30A and 40A.The higher the current, the higher the output power supported.The direct cause of insufficient power supply voltage is that the line resistance is too large, resulting in a relatively large line voltage drop.Material, wire diameter and length will affect the resistance of the circuit.How to solve?
Centralized power supply refers to the way in which the source equipment is installed in the power supply room and the battery room, and the communication power is evenly converted and distributed to each communication device.
The advantage of centralized power supply is to control and manage the power supply plan uniformly, reduce the use of engineering cables, and beautify the engineering wiring.However, please note that when using a centralized power supply solution, you should ensure that the total capacity of the centralized power supply is greater than the sum of the load business capacity of the subsequent levels.At the same time, it is also necessary to consider that the wire diameter of the front-end cable should meet the current requirements of all loads in the back-end.
Centralized power supply can centrally manage power to ensure power quality, and can also avoid power outages or other failures caused by regional power outages or instability of distributed power sources.It can supply power to multiple DC power supply devices at the same time, saving trouble and trouble.
If the user is using the port to output 12V power.After connecting to a large number of wireless APs, the AC cannot find the AP at all, so the AP will not send data packets to the AC by capturing packets.Connect the AP directly to the AC, the communication is normal, and cannot communicate with the place.At this point, it can be concluded that there is no equipment failure between AC and AP.Therefore, the engineer suspects that the power supply problem is caused by the centralized power supply..So why is the centralized power supply insufficient?
1.Most centralized power supplies support proper adjustment of the output voltage. At the position marked VADJ, use a Phillips screwdriver to rotate the output voltage.After testing, adjusting the voltage from 12V to 14V can effectively extend the power supply distance by about 30%.
2.Each TP-LINK AP that supports DC power supply will have a passive PoE module, change the centralized power supply mode, and then use the module for power supply.Emergency lighting centralized power supply