IEC 62026-1:2000 pdf download-Low-voltage switchgear and controlgear – Controller-device interfaces (CDIs) Part 1: General rules.
3.5 CDI component device, controller or other component for which the requirements are specified in a CDI part 3.6 CDI power supply power supply with characteristics and parameters suitable for the CDI’s functionality and capability 3.7 CDI power distribution medium inter-connecting means used to transfer power within a CDI NOTE In the case of a CDI that has “power on the communication medium” architecture, the CDI power distribution medium also transfers data within the CDI. 3.8 device physical unit containing application elements and that may contain communication elements EXAMPLES: control circuit device (see 2.2.16 of IEC 60947-1), presence sensing device, pressure sensing device, actuator, annunciator, operator terminal, motor controller, current sensor, valve control, data logger, bar-code scanner, push-button, pilot light, etc. 3.9 device profile representation of device functionality available to the CDI 3.10 multicast process of data exchange which occurs when a device or controller produces one message to multiple devices and/or controllers for their appropriate action 3.11 polling process of data exchange which occurs when a device or a controller sends data to, or requests data from, a specific device or controller NOTE The receiving device responds to the polling by acting according to the data it receives or by returning its status data. When this transaction is completed, the device polls the next device in a predetermined sequence. 3.12 strobing process of data exchange which occurs when a device or a controller sends a single request for data from one or more devices and/or controllers NOTE Each device receiving the message then responds with its requested data in a predetermined sequence.