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.
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Features
- 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
- HWg-PD Trigger: Controls other IP devices, redirects alarms to SMS
-
HWg-PDMS: Logging,export to MS Excel
- >>
Third-party SNMP software
(HP OpenView, IBM Tivoli, Nagios, Zabbix, Cacti, Monitor one, The Dude, Paessler IPCheck,
Ipswitch WhatsUp, Axence nVision, CBR little:eye, LoriotPro, GFi NSM, SNMPc 7, CA
NSM, ActiveXperts NM, Intellipool NM, MSC Operations Manager 2007)
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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
Usage examples
- 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 ?) 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.
Benefits:
- 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.

Ordering
OID
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Type description
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600 452
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HWg-PWR: M-Bus IP data collector with Web and SNMP
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600 477
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HWg-PWR 1f 230V mobile box (photo)
Mobile demonstration solution for HWg-PWR. Device can be used as temporary 1 phase
(230V) meter.
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M-Bus Accessories
- 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)
- others
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.
For 1 phase electricity meter you need typically 4 values (V, A, kWh, Q).
For 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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