M12 D-coded Ethernet cable is used for data transmission, normally is shielded, one end is D-coded M12 cable which can be male or female, the other end is open or with RJ45 connector(also can be D-code M12 connector), the cable jacket have PVC, PUR for option, if used for robots or machine vision, sometimes will use drag-chain cable(PVC or PUR jacket).

• PVC : PVC (Polyvinyl Chloride) is a commonly used material for cable insulation and is known for its durability and low cost. PVC cables are flexible and easy to handle, making them a popular choice in many industries. They are also resistant to moisture, heat, and chemicals, which makes them suitable for a wide range of applications. However, PVC is not suitable for use in environments with high mechanical stress, high temperatures, or exposure to oils, fuels, and solvents.
• PUR :  PUR (Polyurethane) is a more advanced insulation material that is designed for harsher environments. PUR cables are highly flexible and have excellent resistance to abrasion, cutting, and tearing, making them ideal for use in dynamic applications such as robotics and automation. They are also resistant to oil, fuels, and solvents, and can operate in a wide range of temperatures, from -40°C to 80°C. However, PUR cables are typically more expensive than PVC cables.
• Drag-chain cable : Drag-chain high flex Ethernet cable is a type of Ethernet cable that is specifically designed to be used in dynamic applications where the cable needs to withstand repeated bending and flexing, such as in robotic or automation systems. This type of cable is typically installed inside a drag chain, which is a type of protective housing that helps to guide and protect the cable as it moves. The design of drag-chain high flex Ethernet cable includes a highly flexible jacket material that is capable of withstanding repeated bending without cracking or breaking. The cable often has special shielding and insulation to reduce electromagnetic interference (EMI) and ensure reliable data transmission.