Issue link: https://resources.mouser.com/i/1442799
Figure 3: Safe motor connection: S, K, and M coding were designed for AC applications, such as connecting a three-phase motor—360° shielding protects the power connector from EMC interference. (Source: Phoenix Contact) probe in the motor. This means one less cable is required for electrical engines, which significantly reduces the installation time and associated costs. Industrial Connectors for Harsh Environments The M12 power connector meets increased current and voltage values already addressed, but it also must meet other requirements specific to the application. For example, the temperature resistance of any plastics used in the connector is an important consideration. When attaching a power supply to a motor, the housing surface temperature can quickly reach 100°C. Therefore, the contact carrier plastic must be resistant to a temperature of 130°C. The IP degree of protection is also important: The M12 power must have a protection degree of IP65/IP67 to protect from spray water or temporary submersion (Figure 3). For North American manufacturers (or those who export into the North American market), UL 2337 approval is necessary. UL 2337 describes the requirements for cable assemblies in the power range and has additional tests compared with UL 2238, which describes requirements for signal assemblies. The Grounding (Bonding) Path Current Test is especially important in the technical design of the M12 power connector. Depending on the connected cable section, the PE contact must be able to resist a 300A current for up to four seconds. To transmit such high current, the PE contact section must be increased via the M12 metal coupling nut. In order to protect from electric shock, a connection between the metal coupling nut and the PE contact is required. The new M12 power connectors provide this connection between the metal coupling nut and the PE contact in the | 11 | contact carrier via an innovative tin pressure-casting process. The extremely reliable connection stands up to the tough requirements of the UL standard and also enables a good connection to shielded cables frequently used in electric motors to protect from EMC effects. Power in a Familiar Form Factor The M12 connector system gives the user not just a standardized signal and data connection, but now also encompasses power transmission. The compact M12 size enables a device design that does not sacrifice space for comfort. The continuing standardization gives device manufacturers planning stability and assurance that there is compatibility between suppliers. More information: www.phoenixcontact.com/m12power Conclusion