| CommandFrame | Represents the SEL Fast Message implementation of a ICommandFrame that can be sent or received. |
| Common | Common SEL Fast Message declarations and functions. |
| CommonFrameHeader | Represents the common header for all SEL Fast Message frames of data. |
| ConfigurationCell | Represents the SEL Fast Message implementation of a IConfigurationCell that can be sent or received. |
| ConfigurationCellCollection | Represents a SEL Fast Message implementation of a collection of IConfigurationCell objects. |
| ConfigurationFrame | Represents the SEL Fast Message implementation of a IConfigurationFrame that can be sent or received. |
| ConnectionParameters | Represents the extra connection parameters required for a connection to a SEL device. |
| DataCell | Represents the SEL Fast Message implementation of a IDataCell that can be sent or received. |
| DataCellCollection | Represents a SEL Fast Message implementation of a collection of IDataCell objects. |
| DataFrame | Represents the SEL Fast Message implementation of a IDataFrame that can be sent or received. |
| FrameParser | Represents a frame parser for a SEL Fast Message binary data stream that returns parsed data via events. |
| FrequencyDefinition | Represents the SEL Fast Message implementation of a IFrequencyDefinition. |
| FrequencyValue | Represents the SEL Fast Message implementation of a IFrequencyValue. |
| PhasorDefinition | Represents the SEL Fast Message implementation of a IPhasorDefinition. |
| PhasorValue | Represents the SEL Fast Message implementation of a IPhasorValue. |
| DeviceCommand | SEL Fast Message device commands enumeration. |
| FrameSize | SEL Fast Message PMDATA setting frame size enumeration. |
| MessagePeriod | SEL Fast Message frame rate enumeration. |
| StatusFlags | SEL Fast Message status word flags enumeration. |