HWg-PWR: M-Bus IP energy meter (SNMP, WEB)
Warning: Product is replaced by a new version: HWg-PWR 3/12/25
The HWg-PWR captures data from 3 external meters on the M-Bus and connects the data to IP. M-Bus data are available over Web (graphs), SNMP, Emails or Log files. With external M-Bus (EN 13757) meters it can be used for remote monitoring/metering of Electricity power, Heat, Water or Gas consumption. There are standard 3rd party M-Bus compatible meters on the market.
HWg-PWR is reads data form external 3 M-Bus meters (EN 13757) and analyzes them. Up to 30 metered values can be shown on the WEB by graphs or monitored over SNMP.
The HWg-PWR M-Bus IP meter supports alarming through E-mail or SNMP traps whenever a defined value exceeds limit (current overload).
- The M-Bus metering standard (EN 13757) is supported. There are certified meters with M-Bus interface from 3rd party vendors on the market (Electricity, Heat (calorimeters), Gas & Water meters). >> Supported M-Bus meters
- With HWg-PWR you can simply monitor energy costs (Datacenters, Remote sites, Office buildings, Family houses)
- Certified Electricity power meters with M-Bus interface are used for energy metering. You can use this data for billing your customers. No current or 1 phase limits. Simply install one 63 Amperes power meter per cabinet and monitor it remotely over SNMP.
- Ethernet: RJ45 (10BASE-T)
- WEB: Embedded WEB server, graphs
- Data input: External M-Bus meters (EN 13757-2)
- M-Bus interface: Up to 3 meters (powered from HWg-PWR)
- M-Bus standards: EN 13757-2 (physical and link layer) & EN 13757-3 (application layer)
- Values limit: Up to 30 values from all meters
- Digital Inputs: 3 DI dry contact inputs
- Power: 230 V AC
- Housing: DIN rail montage
- M2M communication protocols: SNMP, XML, Syslog, Modbus/TCP
- Threshold Alerts: SNMP trap, Email
- Support for programmers: HWg SDK
- Supported software
- Graphs: Logging of measured values with the option to plot graphs
- Counters: Independent energy counters for periodic readings (daily, weekly, monthly, annually, ...)
- Reports: Periodic e-mailing of acquired values over HTTP and by Email
- M-bus: Automatic detection of sensors and measured values (quantities)
- External M-bus meters
- You can use certified and calibrated meters
- Single-phase or 3-phase power meters can be used
- Support for single-tariff and multi-tariff meters
- M-Bus values (quantities) depend on the used meter only
- Typical values (quantities) examples
- Instantaneous power input
- Total consumption
- Line voltage
- Line current
- Flow speed
- Remote monitoring of power meters in small server rooms and BTS
- Monitoring of energy consumption in rented premises
- Acquiring energy consumption readings 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
For the first steps, we recommend to use the HWg-PWR 1f 230V mobile box.
M-Bus or S0 pulse counter?
The M-Bus is a standard in energy metering. As opposed to pulse counters (S0), it works with absolute values (acquired data can be used as an argument against the utility bill). At the same time allows working with additional values (quantities), such as voltage, current, flow, drift, etc.
Typical M-Bus meters application
- Water M-Bus meters
- Gas M-Bus meters
- Heat M-Bus meters (calorimeter)
- Electricity power M-Bus meters
Electricity metering application
HWg-PWR + M-Bus electricity power meter remotely monitors an electrical network.
The user can monitor :
- Total electricity consumption
- Instantaneous electricity consumption
- Instantaneous voltages at individual lines
- Instantaneous current flowing through each line
- Power factor (cos ϕ) of individual lines
An allowed range of values can be configured for currents and voltages; if the instantaneous value is lower (voltage) or higher (current), an alarm is sent by e-mail or SNMP trap to your monitoring system.
- Monitor the total and instantaneous consumption of your customers
- Monitor the total load on your electricity distribution system over time and plan changes
- Provide periodic reports
- Inform about critical situations
- Avoid phase overloading caused by unsuitable load distribution or undervoltage due to wiring problems.
||HWg-PWR: M-Bus IP data collector with Web and SNMP
|| HWg-PWR 1f 230V mobile box (photo)
Mobile demonstration solution for HWg-PWR. Device can be used as temporary 1 phase (230V) meter.
- Meter 3f ED 310.DB HWG (3 phase 380V M-Bus energy meter for direct measuring max load 63A. Pulses & M-Bus data output - 3x230V/400V, (5)63A)
- Meter 3f ED 310.I.DB HWG (3 phase 380V M-Bus energy meter for indirect measuring max load 5A. Pulses & M-Bus data output - 3x230V/400V, x/5A)
- Meter 1f DHZ 5/63-M-BUS (1 phase 230V M-Bus energy meter for direct measuring max load 63A. M-Bus data output
- M-Count 2C S0 to M-Bus converter and datalogger (2x pulse input (S0) to M-bus output)
- CLA 3.1 (Measuring current transformer 1000A/5A accuracy class0,5S, power 10VA)
- CLB 2.65 (Measuring current transformer 200A/5A accuracy class 0,5S, power 10VA)
Ordering and FAQ
- What is max number of single/triple phase lines that can be monitored with the HWg PWR meter M-Bus solution?
HWg-PWR is limited for max 3 devices and max 30 values in total.
1 phase electricity meter you need typically 4 values (V, A, kWh, Q).
3 phases electricity meter you need typically 10-15 values (3xV, 3xA, 3xW, 3xQ, Total kWh)
So typically 1x 3phases and 2x 1phase can be simply connected to one HWg-PWR meter. HW group will soon present a "HWg-PWR 25" for up to 25 Electricity meters.
- What values can HWg-PWR monitor?
HWg-PWR can monitor any values and quantities that are accessible over M-BUS from the respective meter (electricity meter, water meter, ...).
- Is it necessary to use meters from you?
Not at all. You can use any M-BUS enabled device from any manufacturer.
- How many devices can I read simultaneously?
M-BUS is a bus that supports up to 250 connected devices. At this time, HWg-PWR supports up to 3 devices. More devices will be supported in a later version.
- Can I combine electricity, water and gas meters on a single bus?
Yes. However, they must all use the same communication speed (300 b/s by default).
- What is the maximum distance of sensors from the unit?
At 300 Bd, a cable segment length must not exceed 1000 m (350 m at 9600 Bd).
- Where can I find the prices of your devices?
Ask our distributors, or request a quote directly from us using the form at this page.
- What is the lead time for ordered samples?
We are currently building up a stock of HWg-PWR units. When your order is confirmed, we inform you by e-mail about the approximate delivery date.
- What is the warranty?
The standard warranty is 2 years, can be extended upon request.
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M-Bus EN 13757-3, energy consumption metering, energy meter, gas meter, web, graph, SNMP
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