M-Bus energy meters
M-Bus energy meters measure active electrical energy and provide consumption data via an M-Bus interface for centralised readout. Depending on the model, Janitza’s MID-certified B-series meters are available as single-phase meters, three-phase meters or current-transformer meters.
Billing
Legally compliant metering and billing
Certification
Tested and approved in MID and IEC
Communication
Available as either M-Bus or RS485
M-Bus energy meters for fair cost allocation and efficient energy use
Whether in a shopping centre, airport, hotel or office building, facility managers need to use energy more efficiently while allocating costs fairly among tenants or consumption points. M-Bus energy meters support both objectives by measuring electricity consumption and making the data available via the M-Bus interface for further use. This provides a reliable basis for transparent consumption monitoring and cost-centre analysis.
The meters continuously record consumption, making it possible to assign readings to individual tenants, areas or consumption points. Energy waste can be identified sooner, as unusually high consumption can be detected and analysed. The MID-certified energy meters primarily measure active and reactive energy. M-Bus communication eliminates the need for laborious on-site manual readings. The integrated pulse output can also transmit energy pulses to a building management system.
Your benefits with Janitza M-Bus energy meters
Janitza M-Bus energy meters combine precise consumption measurement with an interface for centralised data reading. The B-series meters are available as single-phase meters, three-phase meters and current-transformer meters. This makes them suitable for a range of metering tasks in single- and three-phase systems.
Centralised consumption monitoring
M-Bus meters provide electrical consumption data via the M-Bus interface. This reduces the need for manual readings and makes it easier to allocate consumption to individual tenants, cost centres or consumption areas.
The right meter for your application
The B21 is designed for single-phase applications with direct connection up to 65 A. The B23 is suitable for three-phase applications with direct connection up to 65 A. The B24 is a three-phase current-transformer meter designed for use with current transformers.
MID-certified measurement
Janitza B-series M-Bus energy meters are tested and approved in accordance with MID and IEC standards. This makes them suitable for applications that require reliable measurement and transparent allocation of electrical energy consumption.
B21, B23 and B24: An overview of M-Bus meters
The B-series M-Bus energy meters differ in phase count, connection type and measurement application. This clear distinction makes it easier to choose the right product. Depending on the installation, operators can select single-phase measurement, three-phase direct measurement or measurement via current transformers. All M-Bus models are equipped with a pulse output and an M-Bus interface.
Current transformer and accessories
Frequently asked questions about M-Bus energy meters
What is an M-Bus energy meter?
An M-Bus energy meter is an energy meter with an M-Bus interface. It measures active electrical energy and provides consumption data for centralised reading. This makes it suitable for applications where consumption readings do not need to be taken manually on site.
Which M-Bus energy meters does Janitza offer?
Janitza offers the B21, B23 and B24 M-Bus models. The B21 is a single-phase meter, the B23 is a three-phase meter and the B24 is a three-phase current-transformer meter.
When is the B21 M-Bus suitable?
The B21 is suitable for single-phase applications with a direct connection of up to 65 A. It has one measurement input, an alarm function, an M-Bus interface and a pulse output, and is 2 TE wide.
When is the B23 M-Bus suitable?
The B23 is suitable for three-phase applications with a direct connection of up to 65 A. It is designed for 3- and 4-wire connections and has an alarm function, an M-Bus interface and a pulse output. It is 4 TE wide.
When is the B24 M-Bus suitable?
The B24 is suitable for three-phase measurements using current transformers. It has three current-transformer connections and a freely adjustable transformer ratio of up to 9999/1–6. It also features an alarm function, an M-Bus interface and a pulse output.
Are the M-Bus energy meters MID-certified?
Yes. The B21, B23 and B24 M-Bus energy meters have been tested and approved in accordance with MID and IEC standards. They support reliable, traceable consumption monitoring.