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In industrial environments, signal transmission in industrial control cabinets faces numerous challenges. Sources of electromagnetic interference are widespread; high-frequency equipment such as motors, variable-frequency drives, and welding equipment generate a large amount of electromagnetic radiation. This radiation, like invisible "interference waves," constantly impacts the signal transmission system. Simultaneously, crosstalk between cables and ground loop interference can also seriously harm signals, potentially leading to data transmission errors and equipment malfunctions.

UL certification holds significant authority in the network infrastructure field, with its standards for RJ45 modules being both scientific and stringent. Based on the UL 498A (2019 edition) standard, there are clear requirements for UL certified RJ45 modules regarding electrical performance, mechanical durability, and fire rating.

In the wave of Industry 4.0 and intelligent manufacturing, the stability of network connectivity directly determines the efficiency and reliability of the production line. Ordinary commercial RJ45 connectors perform well in office environments, but frequently "fail" in high-temperature, dusty, and vibrating industrial environments. Industrial-grade RJ45 connectors, with their IP67/IP68 protection, -45℃ to +85℃ wide-temperature operation, and anti-electromagnetic interference (EMI) features, have become the "lifeline" of industrial networks.

The nominal data rate of Gigabit Ethernet is 1 Gbps (gigabits per second), but to handle the overhead of Ethernet frame preamble, inter-frame gap, etc., the actual line rate of the physical layer (PHY) is designed to be 1.25 Gbps. Therefore, the "1.25G" in the 1.25G optical module refers to the physical layer line rate.

Whether 850nm and 1310nm SFP optical modules can be shared depends on the specific scenario. The core principle is that wavelengths must match for communication, but indirect sharing may be possible with specific technical support.

Whether 850nm and 1310nm SFP optical modules can be shared depends on the specific scenario. The core principle is that wavelengths must match for communication, but indirect sharing may be possible with specific technical support. A detailed analysis is as follows

In most cases, an RJ45 network interface (referring to the physical interface circuit on a device, such as a network card or switch interface) cannot function without a transformer. This is determined by Ethernet standards and practical application requirements. The specific reasons are as follows

It is widely used in network environments such as Ethernet. By connecting twisted-pair cables (such as common unshielded twisted-pair UTP or shielded twisted-pair STP cables), it enables physical connection and data transmission between network devices such as computers, switches, and routers. The RJ45 connectors on both ends of the network cables we use daily (such as Cat5e, Cat6, etc.) are typical examples.