DIN EN 50325-1:2024-04

This document applies to controller-device interfaces that provide defined interfaces between low-voltage switchgear, controlgear, control circuit devices, switching elements and controlling devices (for example, programmable controllers, personal computers, etcetera). It may also be applied for the interfacing of other devices and elements to a controller-device interface. This document specifies requirements for controllers and devices utilizing these interfaces, including not only the communication protocol specification, but also associated relevant electrical and mechanical characteristics. It also specifies the electrical and EMC tests required to verify the performance of each controller-device interface when connected to the appropriate controllers and devices. This document establishes a consistent terminology and format for the subsequent interfaces. It also harmonises requirements of a general nature in order to reduce the need for testing to different standards, increase understanding and facilitate comparisons of controller-device interface standards. Those requirements of the various controller-device interface standards that can be considered as general have therefore been gathered in this document. There are no known restrictions. The controller-device interfaces described in this standard utilize a common base protocol to provide solutions to users in industrial environments who have a need for simple communications and diagnostics. As a result of the common use of CAN, the interfaces described provide a common set of capabilities that are ideally targeted to applications which include simple devices, limited distance and limited amount of data per transmission. The solutions described in this standard have been used for many years by industry to solve application requirements involving low-voltage switchgear and controlgear.