HWg-PWR 3/12/25: Smart M-Bus to Ethernet gateway
HWg-PWR is a smart Ethernet gateway for remote energy metering and consumption monitoring. To measure the consumption of water, electricity and other energies, external meters with the M-Bus interface are used. Up to 3 / 12 / 25 M-Bus meters can be connected to the HWg-PWR unit. Individual meters (electricity meter, water meter, gas meter, heat meter etc.) are produced by third parties and connected via their M-Bus interface. HWg-PWR is a smart gateway that monitors energy consumption and warns about abnormal values The unit provides a Web interface, charts, SNMP and Modbus/TCP output, data logging, e-mail and SMS alerts, and much more.
HWg-PWR 3/12/25 monitors energy consumption using standard external energy meters produced by well-known manufacturers. It is possible to mix electricity meters, water meters, gas meters etc. by different manufacturers. Depending on version, HWg-PWR supports 3, 12 or 25 external meters with the M-Bus interface (EN 13757).
HWg-PWR 3 / 12 / 25 – Energy monitoring gateway:
- Sends an alarm in the event of failure or value out of a specified range (E-mail, SNMP Trap, SMS)
- Logs selected values (displays graphs over the WEB interface)
- 8x Digital Inputs for detecting single-phase 110/230VAC outage
- Converts the consumption (e.g. from [kWh] to [€]) without a computer or additional software
- Periodically sends an energy consumption report for the given period as an e-mail attachment
- Actively uploads data to a “portal” using the HWg-Push protocol
Advantages of using third-party M-Bus meters
- Vast range of meters with the EN 13757 (M-Bus) interface to choose from.
It is easy to use special-purpose meters (non-standard form factor or measured range, e.g. indirect electricity meters rated up to 1000 A).
- M-Bus meters frequently provide extended information (total consumption and immediate values, voltage at different phases, power factor, etc...).
- Values from certified meters can be used for billing purposes.
- Ethernet: RJ45 (100 Mbit)
- WEB: Built-in Web server, charts
- Data input: 3 / 12 / 25 external meters equipped with the M-Bus (EN 13757-2) interface
- M-Bus power: Meters powered from HWg-PWR
- M-Bus standards: EN 13757-2 (physical layer) & EN 13757-3 (application layer)
- Variables (data points): Up to 100 different variables from all (max. 25) meters
- M-Bus: Automatic detection of meters and available values
- Digital inputs: 8x Digital Input for 110/230V phase failure detection (senses tripped circuit breakers)
- Data logging: 170,000 values (3 values every 15 minutes = 590 days)
- Power: 110 or 230V AC
- Mechanical: Fits on a DIN rail
- M2M communication protocols: SNMP, XML, Modbus/TCP
- Response to thresholds: SNMP trap, E-mail, SMS (via SMS-GW)
- Portal: HWg-Push protocol, supports
- Graphs: Logging of values with the option to plot graphs
- Counter: Independent counter for periodic consumption readouts (daily, weekly, monthly, annually, ...)
- Report: Periodic e-mailing of measured values
- SMS Gateway: Device can send SMS by external "HWg-SMS-GW" without any software.
- Support for programmers: HWg SDK
- Supported software
- External M-Bus meters (third-party products)
- Values available over M-Bus depend on the meter – we recommend to always check the supported values with the manufacturer!
- Support for certified and calibrated meters
- Support for single-phase and polyphase electricity meters
- Support for single-tariff and multi-tariff meters
- Current transformers enable measurements of high currents
- Examples of typically available values:
- Instantaneous power input
- Total consumption
- Line voltage
- Line current
- Power factor (cos φ)
- Flow speed
||3x Dry Contact
M-Bus or S0 pulse counter
S0 is a legacy system of counting pulses that correspond to a certain amount of energy.
The M-Bus interface is the current standard for energy metering. Unlike pulse counting (S0), it works with absolute values (that can be used for customer billing). In addition, M-Bus provides more values, such as the immediate current and voltage, cos φ, and so on.
An S0 to M-Bus converter can be used to connect S0 devices:
M-Bus meter manufacturers
Caution: We recommend to always check and test what values does the manufacturer guarantee at the M-Bus interface.
- Remote monitoring of electricity meters in small server rooms and BTS
- Monitoring of energy consumption in rented premises
- Reading out energy consumption in remote or inaccessible areas
- Control over energy costs
- Checking for individual line overloads in three-phase wirings
- Checking for undervoltage in electric wirings
- Monitoring the flow of liquids
Collecting data from 1 to 25 M-Bus electricity meters
- Various energy meters (equipped with the M-Bus interface) are connected to the HWg-PWR unit.
- All values are available to external software over LAN and SNMP.
- Energy consumption details can be viewed using the Web interface or an iPhone or Android app.
Server room: Energy consumption monitoring + phase outage detection
- Up to 25 electricity meters measure the single-phase or three-phase consumption of the cabinets.
- Up to 8 inputs can detect phase outages.
- When a phase fails, a warning can be e-mailed.
- Upon an alarm (phase failure or current out of range), a text message alert can be sent to a mobile phone via an external SMS Gateway.
- Energy consumption data can be connected to any SCADA system (Modbus/TCP) or accessed over SNMP.
Measuring energy consumption with S0 pulses and M-Bus meters
- Modern electricity meters with the M-Bus interface can be connected to HWg-PWR directly.
- Older electricity meters with a S0 pulse output can be connected using a “S0-M-Bus” converter.
- Current consumption charts are available through the HWg-PWR web interface.
- Every day, week or month, HWg-PWR e-mails a report. The e-mail contains a billing statement including KWh and a conversion to currency.
- When the current consumption exceeds or drops below a set threshold, the unit sends an e-mail alert.
Remote energy metering with a central WEB portal
- Various energy meters are connected to a single HWg-PWR unit.
- Each unit has a WEB interface for configuration, viewing logs, etc.
- All consumption data are uploaded to a central portal using the HWg-Push protocol.
- The central portal (e.g. SensDesk) generates detailed analyses and statistics concerning energy consumption.
||Smart Ethernet gateway for connecting 3 M-Bus meters to a LAN.
||Smart Ethernet gateway for connecting 12 M-Bus meters to a LAN.
||Smart Ethernet gateway for connecting 25 M-Bus meters to a LAN.
|HWg-PWR 3 mobile box
||Demonstration mobile solution for HWg-PWR 3 - photo.
Mobile box can be used as temporary 1 phase (230V) meter.
||HWg-SMS Gateway start set
M-Bus meters supplied by HW group
We recommend to order M-Bus meters directly from the respective manufacturer's distributor for your local market.
The following M-Bus meters are produced by third parties. HW group offers these meters to simplify your first steps.
- Meter 3f ED 310.DB HWG
ED 310.DB HWG is a static three-phase, two-tariff electricity meter for direct measurement up to 63A, with M-Bus and S0 interfaces – 3x230V/400V, 5(63)A
- Meter 3f ED 310.I.DB HWG
ED 310.I.DB HWG is a static three-phase, two-tariff electricity meter for indirect measurement, with M-Bus and S0 interfaces – 3x230V/400V, x/5A
- Meter 1f DHZ 5/63-M-BUS – Single-phase electronic electricity meter for direct measurement up to 63A.
- Meter 3f ZMF120ACs2 M-Bus – three-phase electricity meter without a disconnecter, direct up to 40A.
- Meter 1f ZCF120ABs2 M-Bus – single-phase electricity meter with a disconnecter, direct up to 40A.
- Meter gas G350 M-Bus – L435 M-Bus gas meter, with 250mm pipe spacing and G1¼ ISO 228-1 class B.
- M-Count 2C – 2x S0 datalogger and converter to M-Bus (2x pulse input (S0) / M-Bus output)
- CLA 3.1 – Current measurement transformer, 1000A/5A, accuracy class 0,5S, power 10VA
- CLB 2.65 – Current measurement transformer, 200A/5A, accuracy class 0,5S, power 10VA
- We will be happy to help you with selecting other M-Bus accessories.
Ordering and FAQ
|HWg-PWR, M-Bus gateway, Mbus IP, M-Bus EN 13757-2, MBus Ethernet, EN 13757-3, M-Bus electricity meter, M-Bus logging, electrical energy metering, electricity meter,
gas meter, heat meter, M-bus, SNMP, modbus/tcp, HWg-push, web, graphs, charts
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