In order to reduce testing costs, non-standard POE devices have emerged on the market. What is the difference between standard POE and non-standard POE?
It goes without saying that standard PoE products are products that comply with the IEEE802.3af and IEEE802.3at protocols, with a standard power supply voltage of 48V. The standard PoE power supply mode requires front-end power supply equipment (PSE) to have functions such as terminal detection, device classification, and power loss evaluation, and the receiving device (PD) should also be compatible with the IEEE802.3af protocol standard in order to be detected by PSE. Only when both the power supply end (PSE) and the receiving end (PD) meet the standards can they be considered a true PoE solution.
Non standard PoE products refer to those that only use idle cores of network cables as power supply wires, without IC monitoring and management units, and directly supply DC power without detecting and judging PD (receiving equipment). The DC power supplied is usually 12V, 24V, and 48V. Especially for non-standard 48V products, there is a lot of confusion and often people mistakenly think it is a standard PoE.
Due to the lack of a handheld system, non-standard PoE has the following potential safety hazards:
Hazard 1: The receiving end cannot be stabilized, and the terminal operation is unstable. The network cable core is relatively thin, with a large voltage drop, and there is no voltage stabilizing device at the receiving end. The system often operates in an undervoltage or overvoltage state, which will inevitably shorten the working life of the receiving end;
Hazard 2: Burnout of equipment, electric shock, aging of wiring, water leakage, short circuit, fire hazard. When the power supply equipment is not connected to the network terminal that matches the voltage, it is easy to burn out the equipment; When the power supply voltage exceeds 36V, hand contact with electric shock poses a threat to personal safety; In addition, non-standard PoE also has a wireless channel anomaly recognition mechanism, which poses a risk of short circuit fire.