IEEE 1704-2021

This standard serves as the extension of (but not limited to) IEEE Std 1703(TM) with regard to the devices and communications module physical hardware interfaces, reference signals, and their description. IEEE 1704 Communication Modules are described as being attachable and removable to/from the IEEE 1704 Devices.

Utility End Devices, such as meters, are becoming utilized as smart metering devices in advanced metering infrastructure (AMI) environments. The purpose of this standard is to define uniform physical characteristics for the communications devices that will be attaching/detaching to the IEEE 1377 utility End Devices that communicate via IEEE Std 1703.

New IEEE Standard - Active. This standard is an extension to IEEE Std 1703(TM). Physical hardware interfaces and signals, such as logical interface and power (digital and mains), that link metrology devices to communications modules via the USB physical layer are specified in this standard. The communication module described in this standard is not integral (not on the same circuit board) with the metrology registers (circuit board) of the assembly. However, the module is envisioned to partner with a device implementing measurement registers (energy, demand load, power quality and related quantities) that are semantically modeled using IEEE Std 1377™, and encapsulated for communication using IEEE Std 1703(TM)application layer messages.