A PROFINET is a communication standard for automation launched by Siemens and the PROFINET&PROFIBUS organization. Its essence is based on the IEEE Ethernet protocol, with flexible linear, ring, and star topologies. It has the characteristics of good real-time performance, high safety and reliability, high compatibility and low implementation cost, and is widely used in industrial automation.
PROFINET cable is an Ethernet cable developed according to the PROFINET protocol and generally adopts a star-quad structure. According to the application environment, it is divided into TYPE A (Fixed Installation), TYPE B (Occasionally Moving), TYPE C (Towing Chain Application), TYPE R (Robot Application).

A According to the interpretation of IEC: Fieldbus refers to a digital, serial, multi-point communication data bus between field devices installed in the manufacturing or process area and automatic devices in the control room.

The current mainstream field buses include PROFIBUS, CANBus, DeviceNet, CC-Link, KNX/EIB, FOUNDATION Fieldbus, AS Interface, RS485 and other products. Weidan Electronics can provide these high-quality bus cables to customers.

A As the transmission and transmission frequency of data cable communication continue to expand, the requirements for data transmission are getting higher and higher. The crosstalk of the sound quality is the quality index that affects the data communication cable. So how to improve the cable string?
1. Choose a reasonable pitch for twisting. The smaller the real-time twisted pitch, the smaller the crosstalk problem of the cable. However, the smaller the pitch, the worse the lay length of the production cable, and the longer the transmission, so the efficiency should be considered in the notification index, and the most reasonable pitch design should be selected.
2. Broadcast line pair distance reception. The farther the distance between a pair of wires is, the longer the relative distance is fixed, the problem of cable crosstalk. Such as the crosshairs that increase in the middle of category 6 lines.
 
3. Increase wire shielding. Add a shielding layer, such as a metal aluminum foil layer, to the outside of each core of the cable to improve the crosstalk between the wire pairs. This is also a common structural design method for Category 7 lines.
 
4. Control the production process. Such as the center of the insulation, tracking of the outer diameter, the twisting pitch, the pitched genome, the smaller the movement of the shaft, the crosstalk transmission process.
With regard to the crosstalk problem of communication data cables and related information in design, production, processing, and use, Weidan Electronics  has continuously improved the cable technology and product performance through 20 years of research and manufacturing.

A The 100G QSFP28 optical module is suitable for 100G Ethernet, EDR InfiniBand and 32G Fibre Channel. Generally, it has exactly the same volume and panel density as 40G QSFP+. 40G QSFP+ uses 4 10Gbps channels, which is of similarity of 100G QSFP28 module. 100G QSFP28 module uses 4 high-speed differential signal channels, and its data rate supports 25Gbps, up to 40Gbps. In addition, QSFP28 has an upgraded electrical interface that can support signals up to 28Gbps. QSFP28 SR4, QSFP28 LR4, QSFP28 PSM4, QSFP28 CWDM4, QSFP28 ER4. Compared with other package types of 100G optical modules (CFP/CFP2/CFP4), 100G QSFP28 has higher density, lower power consumption and lower price which is an obvious advantage.

A With strong flexibility, the SFP port is a hot-swappable I/O interface (refers to input/output interface). It is suitable for a variety of products, for example, it can be switched with 1000BASE-SX, 1000BASE-LX/LH, 1000BASE-ZX or 1000BASE-BX10-D/U ports. Besides, the SFP port is backward compatible, supporting 10/100/1000Mbps.