The DDZY121-A 2-level single-phase remote cost control intelligent energy meter (carrier/remote/switch built-in) is a new generation of energy metering product developed by our company. It consists of a static metering unit and a data processing unit, and can be combined with the power line carrier meter reading concentrator and management main station to form a low-voltage power line carrier automatic meter reading system, which completes the long-distance transmission of metering data and power on/off control. The performance indicators of this product meet the requirements GB/T17215.321-2008，GB/T17215.301-2007，DL/T698.1-2009，DL/T645-2007，Q/GDW364-2009 Waiting for the relevant standards of State Grid Corporation of China on smart energy meters.

The Level 2 single-phase remote cost control intelligent energy meter has positive and negative active energy metering functions and can store its data;

Accumulate and store the total, peak, off peak, flat, and valley electrical energy according to the corresponding time periods;

The Level 2 single-phase remote cost control intelligent energy meter has a complete multi rate settlement and billing function, which can set two sets of time periods, and each time period can set four rates;

Adopting an external plug and play carrier communication module, and the carrier communication interface has a failure protection circuit;

The power line carrier communication module of the Level 2 single-phase remote cost control intelligent energy meter can achieve remote real-time point reading, regular reading of meter data, and remote on-off control.