The Siemens SENTRON PAC3120 7KM3120-0BA01-1DA0 is a Power Monitoring Device and control-panel instrument designed to measure and display important electrical parameters in industrial and commercial power systems. It features a 96 × 96 mm graphical LCD display, Modbus RTU communication, True RMS voltage and current measurement, and supports x/1 A or x/5 A AC current-transformer inputs. The device is rated for electrical networks up to 690/400 V and operates over a 45–65 Hz frequency range. Siemens currently lists this exact article in the SENTRON PAC measuring-device family.
The 7KM3120-0BA01-1DA0 belongs to the SENTRON PAC3120 family of multifunction measuring devices. It is designed to provide electrical measurements at the control-panel level while communicating measurement information to compatible automation, monitoring and energy-management systems.
The device uses a graphical display, integrated RS485 communication with Modbus RTU, and a standard 96 × 96 mm panel format, making it suitable for PCC panels, MCC panels, distribution boards and industrial switchboards.
The PAC3120 uses a graphical LCD display for local indication of measured electrical values.
The display area is approximately 54 mm high × 72 mm wide, while the complete device has a 96 × 96 mm front format. This provides convenient access to electrical measurements directly at the panel.
The graphical display is useful during:
Commissioning
Routine electrical inspection
Maintenance
Load monitoring
Troubleshooting
Parameter verification
The 7KM3120-0BA01-1DA0 includes Modbus RTU communication through RS485.
This allows electrical measurement data to be transferred to compatible:
PLC systems
SCADA systems
HMI systems
Energy-management systems
Building-management systems
Industrial monitoring networks
The integrated communication capability allows multiple PAC3120 meters to be connected to a centralized monitoring system. Siemens identifies this exact article with Modbus RTU communication.
The PAC3120 uses True RMS (TRMS) measurement for both voltage and current.
Siemens specifies measurement of sinusoidal and distorted voltage waveforms, with automatic line-frequency detection over the 45–65 Hz range.
True RMS measurement is particularly useful in industrial installations containing:
Variable-frequency drives
UPS systems
Rectifiers
Power converters
Switching power supplies
Other nonlinear loads
The exact article is specified with a rated measurement voltage of 690/400 V.
Siemens' product data identifies 400 V as the maximum rated voltage between line and neutral and 690 V as the maximum rated voltage between the outer conductors. The measurement input supports higher voltages within the specified limits and can also be extended using external voltage transformers where required.
This makes the PAC3120 suitable for compatible low-voltage distribution systems with higher-rated line-to-line voltages.
The 7KM3120-0BA01-1DA0 accepts x/1 A or x/5 A AC current-transformer secondary inputs.
Siemens specifies the current input at 1 A or 5 A, with external current transformers allowing the measurement range to be adapted to the primary current of the installation.
Correct CT ratio configuration is important to ensure accurate current, power and energy readings.
The PAC3120 is designed to measure a wide range of electrical variables through one panel instrument.
It can be used for monitoring parameters such as:
Voltage
Current
Active power
Reactive power
Apparent power
Power factor
Frequency
Active energy
Reactive energy
Apparent energy
Other electrical operating values
Siemens identifies the PAC3120 as a multifunction measuring device and specifies TRMS measurement for voltage and current.
The PAC3120 provides active-power measurement, allowing users to monitor the actual electrical power associated with the connected load or feeder.
Active-power information is useful for:
Load monitoring
Feeder analysis
Generator monitoring
Production-line monitoring
Energy-management applications
Electrical-system evaluation
The device also supports monitoring of reactive and apparent electrical quantities.
These measurements provide additional information about electrical loading, especially in installations containing motors, transformers and other inductive loads.
Monitoring active, reactive and apparent values together can provide a more complete picture of the electrical system.
The PAC3120 can be used for electrical energy monitoring in industrial and commercial installations.
Depending on the configured measurement system, energy information can be used for:
Feeder-level consumption monitoring
Factory energy analysis
Distribution monitoring
Equipment energy tracking
Energy-management systems
This allows users to combine local measurement with centralized data acquisition through Modbus RTU.
The PAC3120 provides monitoring of electrical operating parameters such as power factor and frequency.
The device automatically detects the network frequency and supports the documented 45–65 Hz measurement range, covering common 50 Hz and 60 Hz systems.
Power-factor information is useful for evaluating the behavior of inductive and mixed electrical loads.
The SENTRON PAC3120 uses a standard 96 × 96 mm panel format.
The documented panel cut-out is approximately 92 × 92 mm, making the device suitable for conventional multifunction-meter mounting arrangements. The device depth is approximately 56 mm, with an installation depth of approximately 51 mm.
This format is suitable for:
PCC panels
MCC panels
Distribution boards
Generator panels
Electrical switchboards
Industrial control panels
The PAC3120 is designed for panel installation with protection suitable for the front face when correctly mounted.
This makes it suitable for enclosed industrial electrical panels where the meter needs to remain accessible for local monitoring.
The installation environment and rear terminals should comply with the manufacturer's specified conditions.
The exact 7KM3120-0BA01-1DA0 uses a wide-range 100–250 V ±10% AC/DC auxiliary supply according to Siemens' current product information.
This provides flexibility for integration into different industrial control-panel auxiliary supply systems.
The PAC3120 uses screw-type terminals for the supply and measurement connections.
Siemens specifies screw-terminal connections for the auxiliary supply, voltage measurement and current measurement circuits.
This supports conventional electrical-panel wiring and maintenance practices.
The PAC3120 can form part of an industrial energy-monitoring system where electrical values need to be measured at different points throughout a facility.
It can be installed at:
Main incomers
Production feeders
Utility feeders
MCC sections
PCC sections
Generator outputs
Individual machine feeders
Measurement data can then be collected centrally through the integrated Modbus RTU interface.
A typical installation can be arranged as:
Electrical Network → CTs / Voltage Inputs → PAC3120 → RS485 / Modbus RTU → PLC / SCADA / EMS
This allows multiple electrical monitoring points to be connected to a centralized system.
Such an architecture is useful for facilities that want to monitor electrical consumption and operating parameters without relying only on local panel displays.
The PAC3120 can be used for compatible monitoring of generator outputs, utility incomers and distribution feeders.
Voltage, current, power and frequency measurements can help operators assess:
Electrical loading
Supply conditions
Generator loading
Feeder behavior
Changes in operating demand
In industrial plants, the PAC3120 can be installed on feeders supplying motors, machines and production lines.
Monitoring electrical values at these points can help identify changes in load and support maintenance and energy-management activities.
The PAC3120 and PAC3220 are both SENTRON PAC power monitoring devices. The main communication difference for these articles is:
PAC3120 7KM3120-0BA01-1DA0 → Modbus RTU
PAC3220 7KM3220-0BA01-1DA0 → Modbus TCP
The PAC3120 is therefore suitable when the monitoring architecture is based on RS485/Modbus RTU.
The PAC4220 is positioned as the higher-end model with a color graphic TFT display and more advanced power-quality analysis, while the PAC3120 uses a graphical LCD and Modbus RTU for this specific article.
The PAC4220 is better suited to applications requiring higher measurement accuracy and detailed harmonic analysis.
The PAC3120 belongs to the SENTRON 7KM PAC family, while devices such as the 7KT0307, 7KT0308 and 7KT0310 belong to the SMART 7KT family.
The PAC3120 is particularly useful for applications requiring a 96 × 96 mm graphical display, 690/400 V measurement capability and Modbus RTU communication.
The 7KM3120-0BA01-1DA0 can be used for new installations or as a replacement where an application requires a SENTRON PAC3120 with Modbus RTU and graphical LCD display.
Before ordering, verify:
Exact article number
Electrical network configuration
690/400 V rated measurement requirement
CT secondary rating
CT ratio
Auxiliary supply
RS485/Modbus RTU requirements
Panel cut-out dimensions
The Siemens SENTRON PAC3120 7KM3120-0BA01-1DA0 is relevant for:
Electrical panel builders
Industrial buyers
Energy-management professionals
Electrical contractors
Automation system integrators
Machine builders
OEMs
Factory maintenance teams
Power-monitoring consultants
Electrical product dealers
For SB Smart, the product is positioned as a Siemens SENTRON PAC3120 industrial power monitoring device for electrical measurement, Modbus RTU communication and panel applications.
Siemens SENTRON PAC3120
Article number 7KM3120-0BA01-1DA0
96 × 96 mm panel format
Graphical LCD display
Modbus RTU communication
RS485 interface
690/400 V rated measurement voltage
x/1 A or x/5 A AC CT inputs
45–65 Hz measurable frequency range
True RMS voltage and current measurement
Measurement of electrical power and energy parameters
Power-factor and frequency monitoring
Wide-range 100–250 V ±10% AC/DC auxiliary supply
Screw-terminal connections
Suitable for industrial power monitoring and energy-management applications
Modbus RTU communication: Enables RS485-based connection to compatible PLC, SCADA and energy-management systems.
Graphical LCD: Provides convenient local viewing of electrical measurements.
690/400 V rating: Suitable for compatible higher-rated low-voltage distribution systems.
x/1 A or x/5 A CT input: Supports commonly used industrial current-transformer secondary ratings.
True RMS measurement: Provides reliable measurement for sinusoidal and distorted waveforms.
Multifunction monitoring: Combines multiple electrical measurements in one panel instrument.
96 × 96 mm format: Fits standard panel-meter installations.
Wide-range AC/DC auxiliary supply: Simplifies panel integration.
Industrial design: Suitable for PCC, MCC, distribution and energy-monitoring applications.
The Siemens SENTRON PAC3120 7KM3120-0BA01-1DA0 combines a 96 × 96 mm graphical LCD display, Modbus RTU communication, 690/400 V rated measurement, x/1 A or x/5 A CT inputs and True RMS measurement in a dedicated industrial power monitoring device. Siemens' current Industry Mall data identifies this exact article with a 100–250 V ±10% AC/DC auxiliary supply and screw-terminal connections.
It is suitable for customers looking to buy or source Siemens PAC3120 power monitoring devices for PCC/MCC panels, electrical distribution systems, industrial plants, feeder monitoring and energy-management applications.
For SB Smart, this product is best presented as a Siemens industrial power monitoring device for panel mounting, electrical measurement and Modbus RTU-based monitoring across India.
SB Smart supplies Siemens SENTRON PAC power monitoring devices, multifunction meters and industrial electrical products across Faridabad, Gurgaon/Gurugram, Delhi NCR, Haryana, Noida, Punjab, Mumbai and other major Indian cities.
Major delivery locations include:
Faridabad
Delhi
Gurgaon/Gurugram
Delhi NCR
Noida
Greater Noida
Haryana
Punjab
Mumbai
Pune
Ahmedabad
Bengaluru
Hyderabad
Chennai
Kolkata
Jaipur
Chandigarh
Lucknow
Indore
Surat
Vadodara
Nagpur
Coimbatore
And other major cities across India
The 7KM3120-0BA01-1DA0 is a Siemens SENTRON PAC3120 Power Monitoring Device with a graphical LCD display, Modbus RTU communication and 96 × 96 mm panel format.
This exact article uses Modbus RTU through an RS485 interface.
The rated measurement voltage is 690/400 V. Siemens specifies 690 V maximum rated line-to-line voltage and 400 V maximum rated line-to-neutral voltage for the device.
It supports x/1 A or x/5 A AC CT secondary inputs.
It has a graphical LCD display with an approximately 54 × 72 mm display area.
Yes. The PAC3120 uses TRMS measurement for voltage and current and supports sinusoidal and distorted voltage waveforms.
The measurable network-frequency range is 45–65 Hz, with automatic frequency detection.
The current Siemens product data specifies 100–250 V ±10% AC/DC auxiliary power.
The PAC3120 has a 96 × 96 mm front format with an approximately 92 × 92 mm panel cut-out.
Yes. The integrated RS485/Modbus RTU communication can be used to connect the PAC3120 to compatible PLC, SCADA, HMI and energy-management systems.
PAC3120 7KM3120-0BA01-1DA0: Modbus RTU.
PAC3220 7KM3220-0BA01-1DA0: Modbus TCP.
SB Smart supplies Siemens SENTRON PAC3120 power monitoring devices and industrial electrical products in India for panel builders, industrial buyers, system integrators, energy-management projects and maintenance teams.
| Parameter | Specification |
|---|---|
| Product Series | Siemens SENTRON 7KM PAC |
| Part Number | 7KM3120-0BA011DA0 |
| Product Type | Power Monitoring Device / Energy Meter |
| Display | LCD 96 × 96 mm |
| Measured Parameters | V, A, kW, kWh, Hz, PF, demand values |
| Voltage Input | Up to 690/400V AC |
| Current Input | 1A / 5A CT |
| Communication | Modbus RTU |
| Auxiliary Supply | 100–250V AC/DC |
| Mounting Type | Panel mounting (front) |
| Application | Energy monitoring & power quality analysis |
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