A9MEM3555

What type of device is this?

It is an electronic energy meter designed for electrical monitoring, sub-billing, partial metering and multi-tariff applications.

Which electrical network configurations can it monitor?

The meter supports single-phase plus neutral, three-phase, and three-phase plus neutral configurations.

What electrical values does the meter measure?

It measures voltage, current, active and reactive power, plus active, reactive and apparent energy. Signed four-quadrant energy measurement is supported.

What type of current sensor does it use?

The A9MEM3555 uses Rogowski coil inputs and supports a measurement current range from 50 A to 5,000 A.

What is the rated voltage range?

The supported rated voltage ranges are 100–277 V with a tolerance of ±20%, and 173–480 V with a tolerance of ±20%.

Does it support both 50 Hz and 60 Hz networks?

Yes. The meter is suitable for electrical networks operating at either 50 Hz or 60 Hz.

What communication interface is provided?

It provides Modbus RTU communication through an RS485 screw-terminal connection. Supported communication rates are 9.6, 19.2 and 38.4 kbaud, with even, odd or no parity.

How many tariff levels are supported?

The meter supports four tariffs, allowing energy consumption to be recorded across different tariff periods.

Does it include digital input and output channels?

Yes. It has one digital input and one static digital output. The output operates from 5 to 40 V DC at up to 50 mA.

What accuracy class does it provide?

The A9MEM3555 provides Class 0.5S accuracy for active energy measurement in accordance with IEC 62053-22 and ANSI C12.20.

How is the meter installed?

It uses a clip-on mounting arrangement for installation on a standard DIN rail. Its dimensions are 90 mm wide, 87 mm high and 69 mm deep.

What information is available on the front of the meter?

An LCD presents measured electrical and energy data. Indicator lights show power status, accuracy pulses and active Modbus communication, while an alarm indicates overload conditions.

What environmental conditions can it operate in?

The meter is rated for operation from -25°C to 70°C, storage from -40°C to 85°C, relative humidity from 5% to 95% at 36°C, and altitudes below 3,000 metres.

What enclosure protection ratings apply?

The front panel is rated IP40 and the main body is rated IP20 in accordance with IEC 60529. The unit also has an IK08 impact rating.

What cable sizes are accepted by the terminals?

The screw terminals accept conductors up to 6 mm² for the current circuit, 2.5 mm² for the voltage circuit, 1.5 mm² for input and output connections, and 2.5 mm² for RS485 communication.

What are typical applications for this energy meter?

Typical uses include monitoring high-current distribution circuits, allocating energy consumption between departments or tenants, recording usage by tariff period, and integrating electrical measurements into building or industrial monitoring networks.