Understanding Devices

Understanding the Devices used in Smart Metering

Electricity Smart Meter

ESMESupports 100 SRVs

What it is

The electricity meter endpoint. It records electricity import/export values, holds tariff and prepayment configuration and supports switching of external loads. It comes in Single Element, Twin Element and Polyphase variants.

Roles

EESEISENOMDROUSNA

Gas Smart Meter

GSMESupports 61 SRVs

What it is

The gas meter endpoint. It records gas consumption, tariff, prepayment, debt, and event-log state, with gas supplier and gas network operator role mappings.

Roles

GISGNOMDROUSNA

Communications Hub

CHFGPFCommunications Hub FunctionGas Proxy FunctionSupports 42 SRVs

What it is

The home network gateway for smart metering traffic. The CHF provides communications-hub functions, while the GPF represents the gas proxy path used by gas-related services.

Roles

EESEISENOGISGNOMDROUSNA

Prepayment Meter Interface Device

PPMIDSupports 5 SRVs

What it is

A display device supporting all the functionality of an IHD, plus prepayment specific commands, allowing prepayment actions to be taken in the premise locally without needing to use the ESME or GSME UIs

Roles

EESEISENOGISGNOOUSNA

In Home Display

IHDType 2No direct SRV rows

What it is

A consumer facing display device, displaying energy information

Roles

None in control rows

Related SRVs

No SRVs currently target IHD Devices.

Consumer Access Device

CADType 2No direct SRV rows

What it is

A consumer-authorised access device for HAN data access. CADs support the same functionality as IHDs in terms of data access, but are not required to provide this through a local display.

Roles

None in control rows

Related SRVs

No SRVs currently target CAD Devices.

HAN Connected Auxiliary Load Control Switch

HCALCSSupports 10 SRVs

What it is

A HAN-connected auxiliary load control switch used for load-control and device-management scenarios.

Roles

EISENOOU

Standalone Auxiliary Proportional Controllers

SAPCSupports 89 SRVs

What it is

A standalone HAN-connected controller for managing auxiliary electrical loads, including proportional control of their input or output. Depending on its design, it may also incorporate a load switch or boost function

Roles

EESEISENOMDROUSNA

Virtual WAN Device

VWDNo direct SRV rows

What it is

A consumer-side device that enables a compatible Communications Hub to use the premises’ Wi-Fi as a virtual WAN path. VWD is a DUIS/DUGIDS term; CHTS specifies the resulting Virtual WAN Communications Hub and link rather than a separate VWD equipment class

Roles

None in control rows