DC Power & Energy Meter – AcuDC 240 Series

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AcuDC 240 product images.
AcuDC 240 - front view.
AcuDC 240 - left quarter angle view.
AcuDC 240 - bottom view.
AcuDC 240 - right quarter angle view.
UL Listed
CE Mark

DC Power &
Energy Meter

The AcuDC 240 is a DC energy meter designed to monitor and control DC power systems with a wide range of measurement parameters such as voltage, current, power and energy. The AcuDC 240 supports bi-directional current measurement used in net metering, solar PV, and wind turbine power generation as well as other applications such as transportation systems, cellular communication towers, power distribution systems, and IT networks. It can also be equipped with digital inputs for switch monitoring, relay outputs for remote control, and an over-range alarming.

  • 0.2% accuracy on voltage and current; 0.5% on power and energy
  • Optional 4MB data logging with adjustable log size
  • Optional RS485 Modbus-RTU communications
  • Compatible with DC current sensors, DC voltage sensors, Hall effect sensors, & shunts
  • Equip with a variety of I/O options including Analog Output, Analog Input, Relay Output or Digital Output
  • Standard 72mm x 72mm DIN size for drawer-type panel installation
  • 5 year warranty

AcuDC 240 Overview

What is DC Energy Metering?

DC metering is used in specific applications to measure, collect, and store real-time data for DC power systems. Energy professionals use DC meters to monitor power generation, power usage, or to detect system faults to meet specific performance goals, reduce cost, or to verify energy integrity in their facility. It is used in various industries such as solar systems, EV charging stations, battery energy storage systems (BESS), cell towers, data centers, and light rail transportation.

Customize Your DC Meter Configuration

AcuDC 240 is purpose-engineered to deliver high-precision data to a wide variety of DC metering applications to match your project requirements. The DC energy meter can be configured to operate on a range of voltages and with various current sensors, power supplies, input/output modules, Modbus RS485 communications, or data logging options.

AcuDC 240 back view.
Voltage Rating
Choose from five voltage rating options, up to 1000Vdc directly or via voltage sensor with 0-5Vdc output.
Current Input
Compatible with 0-10A direct input, or using external shunt (50-100mV output) or current hall effect sensor (4-20mA or 0-5V output).
Power Supply
Power Supply Available with two power supply options: P1 is compatible with 100-240Vac or 100-300Vdc. P2 option is compatible with 20-60Vdc.
Input/Output
Optional plug-in digital input, digital output, analog input, analog output, and relay output expansion modules.
Communications
Opt to add Modbus protocol with a built-in RS485 port.
Data Logger
Option to capture critical data by adding 4MB of onboard data logging.
Panel Shop
Option for a pre-wired, pre-configured NEMA 4X panel meter.

AcuDC 240 Main Features

AcuDC 240 - Key Parameters.

MEASURE KEY PARAMETERS WITH HIGH ACCURACY

With 0.5% accuracy on power & energy and 0.2% accuracy on voltage & current, the AcuDC 240 meter captures precision metrics across DC systems up to 1000Vdc. Meter critical, real-time voltage, current, power, energy, and amp-hour using a single, compact device.

Key Specifications:

  • View real-time data instantly on the multi-function display
  • 0.2% accuracy on power & energy available upon request
AcuDC 240 - Modbus RTU.

OPTIONAL MODBUS-RTU COMMUNICATIONS

Communicate all DC metered data to SCADA, PLC, or other external systems using industry-standard Modbus-RTU protocol via an on-board RS485 communication port.

Key Specifications:

  • Six adjustable baud rate between 1200 - 38400 bps
  • Overall RS485 cable length up to 1,200m (4,000ft)
  • Interoperability between third-party devices
  • Open protocol standard
AcuDC 240 - IO Modbus.

OPTIONAL I/O MODULES

A variety of optional analog, digital, relay, and alarm output combinations are available via field-swappable, plug-in I/O modules. Quickly connect to extend the capabilities of your DC energy meter.

Key Specifications:

  • Each module features a unique combination of DI, AO, AI, RO, or DO options
  • Certain modules also feature a Hall effect sensor power supply for added field flexibility
  • +/-15 dc power supply for Hall effect sensors
AcuDC 240 - Key Parameter Icon.
Key Parameters
AcuDC 240 - Key Parameters.

MEASURE KEY PARAMETERS WITH HIGH ACCURACY

With 0.5% accuracy on power & energy and 0.2% accuracy on voltage & current, the AcuDC 240 meter captures precision metrics across DC systems up to 1000Vdc. Meter critical, real-time voltage, current, power, energy, and amp-hour using a single, compact device.

Key Specifications:

  • View real-time data instantly on the multi-function display
  • 0.2% accuracy on power & energy available upon request
AcuDC 240 - Modbus RTU.
Modbus-RTU
AcuDC 240 - Modbus RTU Icon.

OPTIONAL MODBUS-RTU COMMUNICATIONS

Communicate all DC metered data to SCADA, PLC, or other external systems using industry-standard Modbus-RTU protocol via an on-board RS485 communication port.

Key Specifications:

  • Six adjustable baud rate between 1200 - 38400 bps
  • Overall RS485 cable length up to 1,200m (4,000ft)
  • Interoperability between third-party devices
  • Open protocol standard
AcuDC 240 - IO Modbus.
I/O Modbus
AcuDC 240 - IO Modbus Icon.

OPTIONAL I/O MODULES

A variety of optional analog, digital, relay, and alarm output combinations are available via field-swappable, plug-in I/O modules. Quickly connect to extend the capabilities of your DC energy meter.

Key Specifications:

  • Each module features a unique combination of DI, AO, AI, RO, or DO options
  • Certain modules also feature a Hall effect sensor power supply for added field flexibility
  • +/-15 dc power supply for Hall effect sensors

AcuDC 240 Diagram

AcuDC 240 Diagram.

AcuDC 240 Product Map

AcuDC 240 Product Map.
1

Enclosure

Made of high-strength, UL 94V-0 plastic

4

Voltage & Current Input

Terminals for connecting voltage & current

2

LCD Screen

Large, backlit LCD screen shows metered values

5

RS485 Terminal

Communicate via Modbus-RTU protocol

3

Function Keys

Two keys are used to interface with the meter

6

Power Supply

Connection for control power input

1

Enclosure

Made of high-strength, UL 94V-0 plastic

2

LCD Screen

Large, backlit LCD screen shows metered values

3

Function Keys

Two keys are used to interface with the meter

4

Voltage & Current Input

Terminals for connecting voltage & current

5

RS485 Terminal

Communicate via Modbus-RTU protocol

6

Power Supply

Connection for control power input

AcuDC 240 Models

AcuDC 243
Application All DC Monitoring & Metering Applications
Metering Voltage, Current, Power, Energy, Ampere-Hours
I/O Modules Available
(See table for more I/O options)
Data Logging Optional 4MB
Communication Protocol Optional RS485 Modbus-RTU
Current Sensing Input Choose from: Direct Input (0-10A), Shunt (50-100mV), Current Hall Effect Sensor (mA), or Voltage Hall Effect Sensor (V)
Power Supply Choose from: P1 (for 100-240Vac or 100-300Vdc) or P2 (20-60Vdc)
Power Mount Option
AcuDC243
Application All DC Monitoring & Metering Applications
Metering Voltage, Current, Power, Energy, Ampere-Hours
I/O Modules Available
(See table for more I/O options)
Data Logging Optional 4MB
Communication Protocol Optional RS485 Modbus-RTU
Current Sensing Input Choose from: Direct Input (0-10A), Shunt (50-100mV), Current Hall Effect Sensor (mA), or Voltage Hall Effect Sensor (V)
Power Supply Choose from: P1 (for 100-240Vac or 100-300Vdc) or P2 (20-60Vdc)
Power Mount Option
AcuDC Expansion IO Modules
AcuDC 240 I/O Module Product Image.
X1
AcuDC 240 I/O Module Product Image.
X2
AcuDC 240 I/O Module Product Image.
X3
AcuDC 240 I/O Module Product Image.
X4
AcuDC 240 I/O Module Product Image.
X5
AcuDC 240 I/O Module Product Image.
X6
AcuDC 240 I/O Module Product Image.
X7
Digital Input (DI) 2 2 2 2 2 2 2
Analog Output (AO) 2
(4-20mA / 0-20mA)
2
(0~5V / 1~5V)
Analog Input (AI) 2
(4-20mA / 0-20mA)
2
(0-5V / 1-5V))
Relay Output (RO) 2
Digital Output (DO) 2
Hall Effect Sensor Power Supply +/- 15Vdc +/- 15Vdc +/- 15Vdc
X1
Digital Input (DI) 2
Analog Output (AO) 2
(4-20mA/0-20mA)
X2
Digital Input (DI) 2
Analog Output (AO) 2
(4-20mA/0-20mA)
X3
Digital Input (DI) 2
Relay Output (R) 2
X4
Digital Input (DI) 2
Digital Output (DO) 2
X5
Digital Input (DI) 2
Hall Effect Sensor Power Supply +/- 15Vdc
X6
Digital Input (DI) 2
Analog Input (AI) 2
(4-20mA/0-20mA)
Hall Effect Sensor Power Supply +/- 15Vdc
X7
Digital Input (DI) 2
Analog Input (AI) 2
(0-5V/1-5V)
Hall Effect Sensor Power Supply +/- 15Vdc

AcuDC 240 Accessories

DIN rail mounting adapter.
DIN Rail Mounting Adapter

The AcuDC DIN Rail Mounting Adapter is the easy way to mount the AcuDC energy meter on horizontal DIN rail. The adapter quickly secures to the DC meter plus any additional I/O options for a quick, secure installation.

USB converter.
USB Converter

This professional-grade, plug-and-play USB to Serial RS485 Converter is compliant with both USB 1.1 and 2.0 standards and is designed to provide a convenient, reliable USB connection to the AcuDC energy meter and other serial devices.

AcuPanel.
AcuPanel

The AcuPanel is a convenient pre-configured, pre-wired solution that is ideal for situations where installation inside an electrical distribution panel is not an option or in harsh environments where additional protection is needed. The factory pre-wiring will greatly save installation time and reduce frustrating wiring errors.

DC Current Sensors.
DC Current Sensors

Engineered for high accuracy in demanding applications, Accuenergy’s DC current sensors are industrial grade devices designed to provide consistent measurements in a wide range of project environments. Choose from split-core DC sensors, Hall Effect sensors, or DC shunts.

AcuDC 240 FAQ

What is the direct input voltage and current range?

The input range for direct voltage measurement is 0-1000V and for current is 0-±10A.

What are the differences between Hall Effect sensor and a shunt?

A Hall Effect sensor requires a power supply (±15 Vdc) while a shunt does not. Also, a shunt requires you to break the circuit to install while a Hall Effect sensor does not.

Where do I view the energy (kWh) consumption on the meter?

The energy consumption can be found on the E1 screen. This can be found by pressing ‘V/A’ on the meter screen.

What type of serial port does the meter use and does the meter support RS422 and RS232? Can I connect the meter to a computer that does not have an RS485 port?

The meter supports 2-wire RS485 serial bus. The meter does not support RS422 and RS232. A USB-RS485 converter or RS232-RS485 converter can be used if your computer is equipped with a USB port or RS232 port. The pre-configured USB-RS485 converter stocked by Accuenergy is guaranteed to work with our meters. Some generic RS485-USB converters are not guaranteed to work.

Can I use AcuView software to log directly to my computer?

Yes, you can data log directly on your computer using the Acuview software; this can be found in the data log settings or by pressing Ctrl+L. The meter would have to be connected to the computer with the software open for data to be logged.

View all AcuDC 240 FAQs