PRO2-Mod 0.25–100A ModBus MID – single-phase power monitoring
€145.00
MID-certified energy meter for single-phase power monitoring
The HW group PRO2-Mod 0.25-100A ModBus MID is a single-phase energy meter with RS485 Modbus interface. The PRO2 displays numerous instantaneous values such as voltage, current, active power, reactive power, apparent power, frequency and power factor on the LCD display and also provides them via Modbus. The PRO2-Mod complies with the Measuring Instruments Directive 2014/32/EU (MID). This MID approval confirms the accuracy and quality of the meter and enables its use for billing purposes.
The meter measures directly and combines a high accuracy class (1/B) for active energy measurement with a wide temperature range for reliable use in different environments.
Precise measurement with Modbus connectivity
The PRO2-Mod is designed for direct measurement of single-phase circuits up to 100 A.
MID-certified
The meter complies with the Measuring Instruments Directive 2014/32/EU and is therefore suitable for use for billing purposes.
High accuracy class
The PRO2-Mod offers a high accuracy class (1/B) for active energy measurement.
Direct measurement up to 100 A
The meter measures the current in the single-phase 230 V network directly, without an external current transformer.
RS485 Modbus interface
Via the integrated RS485 interface, the measured values can be read out using Modbus RTU and the meter can be configured.
LCD display with instantaneous values
Voltage, current, active, reactive and apparent power, frequency and power factor are displayed directly on the device.
How the PRO2-Mod is designed
The housing of the PRO2-Mod is designed for mounting on a 35 mm DIN rail and is connected via screw terminals.
Connection terminals for the power circuit
Terminals 1 (phase in) and 3 (phase out) as well as 4 (neutral in) and 6 (neutral out) route the circuit to be measured through the meter. The current is measured directly.
RS485 Modbus connection
Via terminals 10 and 11 (A/B), the meter is connected via the RS485 bus to a Modbus RTU master system, through which the measured values can be read out and settings can be made.
S0 pulse outputs
Terminals 18/19 (forward) and 20/21 (reverse) provide potential-free S0 pulse outputs, via which energy consumption can be read out proportionally as a pulse sequence, e.g. for testing or remote reading purposes.
LCD display and control buttons
On the front, a multi-line LCD display shows the meter readings and instantaneous values. Using two buttons, you can scroll through the display pages and configure the meter directly on the device (e.g. scroll time, backlight, Modbus ID).
Infrared interface
In addition, the meter has an infrared interface according to IEC62056-21 (IEC1107), via which it can be read out and programmed with an optical IR reading head and the associated PC software.
Red status LED
A red LED on the front indicates the energy flow: it flashes proportionally to the measured power and thus serves as a quick visual check of whether and how much energy is flowing.
Extensive measurement and configuration functions
In addition to pure energy measurement, the PRO2-Mod offers further useful functions that can be set directly on the device or via Modbus.
Automatic scroll
The display automatically switches between the programmed display pages; the scroll time can be set individually.
Combination code
The total energy can optionally be calculated and displayed from forward, reverse or a combination of both energy directions.
Resettable daily counter
An additional user-resettable meter reading allows simple recording of consumption over a specific period.
Password protection
The advanced configuration mode is protected by a four-digit password to prevent unauthorized changes.
OBIS codes
Optionally, the measured values on the display can be labeled with OBIS codes.
Power failure counter
A power-down counter records how often the meter was without voltage.
Practical application examples
- Billing-capable energy measurement in buildings
- Sub-metering of individual circuits or rental units
- Energy monitoring in commercial and industrial operations
- Integration into Modbus-based building management systems
- Remote reading via S0 pulse output or RS485 bus
- Integration into HW group monitoring systems via Modbus
Commissioning in a few steps
Installation and connection may only be carried out by qualified specialist personnel.
- Mount the meter de-energized on a 35 mm DIN rail
- Connect phase and neutral conductors according to the connection diagram to terminals 1, 3, 4 and 6
- Connect the RS485 bus to the Modbus master system at terminals 10/11
- If required, connect the S0 pulse outputs at terminals 18/19 or 20/21
- Configure Modbus ID, baud rate and other settings via the front buttons or the Modbus registers
- Reattach the protective covers and seal the meter after testing
Why the PRO2-Mod is the right choice
MID approved
Suitable for billing purposes according to 2014/32/EU.
Modbus RTU
Easy integration into existing control systems.
Direct measurement up to 100 A
No additional current transformer required.
S0 outputs
Forward and reverse for remote reading.
IR interface
Readout and configuration via PC software.
24 months warranty
According to the manufacturer with 24 months warranty.
Frequently asked questions
What is the HW group PRO2-Mod 0.25-100A ModBus MID and what is it used for?
The PRO2-Mod is a single-phase energy meter with RS485 Modbus interface that measures voltage, current, power, frequency and power factor. Thanks to MID approval, it is also suitable for billing purposes, e.g. in buildings or for sub-metering of individual circuits.
What does MID approval mean?
MID stands for the European Measuring Instruments Directive 2014/32/EU. An MID-approved meter meets defined accuracy and quality requirements and may be used for billing purposes.
How is the meter read out?
The PRO2-Mod can be read out via the RS485 Modbus RTU interface, via the S0 pulse outputs or via the infrared interface with an optical reading head and PC software.
Does the meter require an external current transformer?
No. The PRO2-Mod measures the current directly in the single-phase circuit.
Can the configuration be protected against unauthorized access?
Yes. The advanced configuration mode of the meter is protected by a four-digit password.
How is the meter mounted?
The PRO2-Mod is designed for mounting on a 35 mm DIN rail and is connected to the circuit via screw terminals. Installation and connection may only be carried out by qualified specialist personnel.
Questions about the PRO2-Mod 0.25-100A ModBus MID?
Our support team in Germany provides free advice on selection, sensors and configuration.
HW-group PRO2-Mod 0.25-100A ModBus MID
General data
- Single-phase energy meter up to 100 A
- MID-approved energy meter
- Communication via RS-485 / Modbus RTU
- Housing: flame-retardant PC plastic
- Rated voltage (Un): 230 V AC
- Operating voltage: 195–253 V AC
- International standard: EN 50470-1/3
- Accuracy class: B (1% accuracy)
Electrical data
- Basic current (Ib): 5 A
- Maximum rated current (Imax): 100 A
- Operating current range: 0.4% Ib to Imax
- Overcurrent withstand: 30 × Imax for 0.01 s
- Operating frequency: 50 Hz ±10%
- Self-consumption: ≤1 W/phase or ≤1 VA/phase
Insulation strength
- AC voltage withstand: 4 kV for 1 minute
- Impulse voltage withstand: 6 kV, 1.2 μs waveform
- Protection class: II
Pulse outputs
- Test output via red LED: 10,000 pulses/kWh
- Pulse rates: 10,000 / 2,000 / 1,000 / 100 / 10 / 1 / 0.1 / 0.01 pulses/kWh
- Pulse width at 1,000 / 100 / 10 / 1 / 0.1 / 0.01 pulses/kWh: 31 ms
- Pulse width at 2,000 pulses/kWh:
- <30 kW: 31 ms
- >30 kW: 15 ms
- Pulse width at 10,000 pulses/kWh:
- <6 kW: 31 ms
- >6 kW: 15 ms
- >12 kW: 5 ms
Measurement accuracy
- At 0.05 Ib, Cos φ = 1: ±1.5%
- At 0.1 Ib, Cos φ = 0.5L: ±1.5%
- At 0.1 Ib, Cos φ = 0.8C: ±1.5%
- At 0.1 Ib to Imax, Cos φ = 1: ±1.0%
- At 0.2 Ib to Imax, Cos φ = 0.5L: ±1.0%
- At 0.2 Ib to Imax, Cos φ = 0.8C: ±1.0%
Data storage
- Data storage for more than 10 years without power supply
RS-485 / Modbus communication
- Bus type: RS-485
- Protocol: MODBUS RTU with 16-bit CRC
- Baud rates: 1,200 / 2,400 / 4,800 / 9,600 baud
- Standard baud rate: 9,600 baud
- Address range: 1–247, user-definable
- Maximum bus load: 60 meters per bus
- Range: 1,000 m
Infrared interface
- Infrared wavelength: 900–1000 nm
- Communication distance: direct contact
- Protocol: IEC 62056-21:2002 (IEC1107)
Environmental conditions
- Permissible operating humidity: ≤75%
- Permissible storage humidity: ≤95%
- Operating temperature: -40 to +70 °C
- Degree of protection: IP51
Dimensions & weight
- Height without protective cover: 92.5 mm
- Height: 141.5 mm
- Width: 35.8 mm
- Depth: 63 mm
- Weight: 0.16 kg net
Connection data
- Maximum conductor cross-section of the power connections: 35 mm²
- Suitable for solid copper conductors
Further data
- MID-approved
- Protection against dust and water ingress: IP51
- The maximum number of meters per bus depends on the installation conditions and the communication technology used.
Manufacturer information:
HW group s. r. o.
Rumunská 26
Prague, 120 00
Czech Republic
Phone: +420 222 511 918
Email: sales@hwg.cz
Responsible person:
Didactum® Security GmbH
Im Mühlenfeld 4
48163 Münster
Deutschland
Fon:
(+49) 250 19 71 63 54 / (+49) 171 33 11 577
Email: info@didactum-security.de
