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  • Current Monitoring with Dual XBee® Interface
  • Compatible with Select Digi XBee® Wireless Modules
  • Ethernet, Bluetooth, Wi-Fi, USB, and RS-232 Interface Options
  • Up to 6 Energy Monitoring Input Channels
  • Options for up to 20 Amp Monitoring per Channel
  • Solid-Core Off-Board Current Sensors
  • 2% Max Error Rate for Resistive Loads
  • May Be Calibrated for Inductive loads or Higher Accuracy
  • 1.5 Meter Cable between Sensors and Controller
  • Dual On-Board I2C Expansion Ports for Unlimited Expansion


SKU: XB2CMAC6XXXA_DLCT27CL20 UPC: Categories: , ,


NCD Current Monitoring Devices

Current monitoring has never been easier, or more accurate using XB2x series current monitoring controllers. The XB2x series includes off-board current sensing, designed to safely clamp over a single high-current wire for current consumption measurement applications. When properly calibrated, up to 6 high-current loads can be monitored simultaneously with a maximum error rate of 2%.

All XB2x series controllers include two communication ports compatible with our entire range of communication options, including Ethernet, Wi-Fi, Bluetooth, USB, or RS-232. For long-range, high-speed wireless communications, use the second communication port for industrial wireless applications supporting the Digi 802.15.4 and Digi S3B DigiMesh® communications modules. This device provides an ideal energy monitoring solution for most industrial and commercial applications at a low cost with unmatched accuracy.

Energy Monitoring Choices

Because we custom-build every controller, you have plenty of options. Simply choose the type of computer interface, the number of channels, type of sensor (split-core or solid-core), and your maximum current load (in amps). We will ship your controller pre-tested and pre-calibrated to 98% accuracy.

Tuning Ranges

When it comes to measuring a wide range of currents, there are many choices. In order to get the most accurate readings, you need to select exactly what you need and nothing more. Don’t be alarmed to see a 100 amp sensor on our web site offered with a 10 Amp measurement range. We do this for the sole purpose of improving accuracy. The electronics and the firmware were tuned to operate in the 10-amp range.

If you need to monitor a 10 amp circuit, you should choose a 10 amp controller (not a 20 amp controller). While there is no difference in cost, there is a significant difference in resolution. A 10-bit sensor reading across a 20-amp range will have HALF the resolution per bit as a 10 amp sensor. For this reason, and for the best possible resolution per bit, we offer many tuning ranges.

Solid Core Sensors

You may have noticed we offer both split-core and solid-core sensor options. Solid-core sensors are ideal in applications where low-cost or tight spaces are required. Solid-core sensors are not able to clamp over existing wire; they require a wire to run through the sensor during installation of the wiring. Solid-core sensors are a great choice for new installations. Because the sensor does not “break apart” like a split-core sensor, it has a smaller size and a lower cost.

Split-Core Sensors

For installations that must be retrofitted to add current monitoring, split-core sensors are our most popular choice. Split-core sensors can clamp over existing wiring by breaking apart the sensor and snapping it in place over the wire. Split-core sensors are larger and more expensive, but the versatility and ease of connection make them extremely popular.

Connection Options

Connecting sensors to a controller usually involves connecting two wires to the screw terminals of a controller. However, our SCT013 sensor includes a plug and a jack, reducing installation time.

Inductive and Resistive Loads

Unlike competing products, we do not gloss over the difficulties in monitoring highly inductive loads, such as motors, pumps, and other electrically noisy devices. We spent months developing algorithms that provide an excellent balance of speed and accuracy, whether you are monitoring resistive loads or inductive loads. Because of the difficulties in measuring inductive loads, our (free) Base Station software can be used to help fine-tune the calibration values to provide a more accurate measurement, further reducing the error rate to less than 2% for the most demanding loads.


To get started quickly, use our free Base Station software. Base Station will have you monitoring energy in minutes, offering direct compatibility with your favorite communication technology (excluding Digi Wireless technologies). We highly recommend at least one USB interface in case you run into problems. Base Station and a USB interface can help get you connected fast!

Download Base Station


NCD Energy Monitoring controllers are designed with expandability in mind. Each controller includes two on-board I2C expansion ports, making it easy to expand to our complete line of I2C sensors, FET controllers, PWM controllers, and I2C relay boards.


NCD Energy Monitoring controllers are rated for use with AC ONLY and will not work with DC loads. We have not yet completed 3-phase testing, but preliminary results are very hopeful. NCD Energy Monitoring controllers require 1.5 seconds to evaluate each channel. Therefore, a 6-channel controller will require 8 seconds to return a result for all channels. Sensors and controllers are designed to work together; it is NOT POSSIBLE to mix sensors to monitor different load sizes with a single controller. Mismatching sensors and controllers can result in permanent damage to the controller.

Users should avoid extending the cable of the current sensor as much as possible. Extending the wires may decrease accuracy.

Our tuning electronics can accept up to 5% current above the rated range, exceeding 10 amps + 5% for an extended period of time may cause damage to the tuning electronics or the CPU on our controller.

Off-board current sensors have a minimum load requirement of 1% of the total rating of the sensor. Failure to meet the minimum load requirements will significantly reduce accuracy. Please see minimum load requirements below.





Tuned Range (Amps)

Minimum Load

DLCT27CL20 24 Solid Core Two-Wire 5, 10, 15, 20 240mA
OPCTL16AL 100 Split Core Two-Wire 10, 20, 30, 50, 70, 100 1 Amp
SCT013 100 Split Core 3.5mm Jack 10, 20, 30, 50, 70, 100 1 Amp
OPCTL38AL 100 Split Core Two-Wire 100 1 Amp
150 150 1.5 Amps
200 200 2 Amps
250 250 2.5 Amps
300 300 3 Amps
400 400 4 Amps
500 500 5 Amps
600 600 6 Amps

Choose Any Two Communication Modules

NCD current monitoring controllers support many communication options.  With a dual interface, choose any two of your favorite communication technologies.  Choose from USB, RS-232, Ethernet, WiFi, Industrial Wireless, or more.

XBee® is a registered trademark of Digi International.

802.15.4 Module Wireless

802.15.4 Long-Range Wireless

Use 802.15.4 Communications if you require industrial strength long-range wireless communications.  802.15.4 is a point-to-point wireless standard, allowing fast communications.  The wireless protocol acts as a long-distance wireless serial port, allowing wireless operation with no modification to software.

802.15.4 Module Wireless

900HP-S3B Industrial Wireless Mesh

Long-Range Wireless Mesh networking is our favorite of all wireless communication technologies.  This is the ONLY communications technology NCD recommends on the factory floor, operating at a safe 900MHz.  Mesh technology will hop data from one location to another to reach its intended destination, users do not need to do anything other than make sure wireless modules stay within hopping range of each other.  We use the Digi 900HP-S3B module in our products, as this is the best the industry has to offer.  With a 2 mile range between modules and up to 8 hops, it is possible to cover 16 miles of wireless territory using this technology.  Using high-gain antennas, this module is capable of communicating to a remote module up to 28 miles away.

Bluetooth Module


Bluetooth is a easy way to add wireless communications to the NCD Industrial product line.  The Bluetooth communications option acts as a transparent serial port between your computer and NCD devices.  Simply pair the device with your computer and access the device through the COM port that is associated with the Bluetooth communications module.

WebRelay Module Ethernet

Ethernet TCP/IP

Control NCD devices using standard Ethernet TCP/IP communications.  Simply open a socket and send and receive TCP/IP data to control our devices.  Our Ethernet TCP/IP Communication modules feature the Lantronix XPort communications module, the best in the industry.  The Lantronix XPort module is an industrial workhorse that we have trusted for many years.

ZRS RS-232 Serial Module

RS-232 Serial

NCD RS-232 Serial Communication modules make it easy to integrate the worlds most prolific communication standard.  Easily interface to desktop PCs and laptops for easy control via standard serial commands.  Most NCD devices typically default to 115.2K Baud; however, older low-cost devices implement 9600 baud data rate as the predominate standard.

ZUSB USB Module Side Entry


Our USB interface module makes it easy to control our devices using the USB port.  Simply plug into any available USB port and start controlling our devices using standard serial commands.  NCD USB Interface modules feature genuine FTDI USB to Serial Converter Chips, the very best in the industry.

WiFi Module


Control NCD devices using standard WiFi TCP/IP communications.  Simply open a socket and send and receive TCP/IP data to control our devices.  NCD WiFi communication modules are manufactured by Microchip, the world leader in microcontrollers.

802.15.4 Module Wireless

ZigBee® Wireless

ZigBee® wireless communications is a popular standard among our customers.  The wireless protocol acts as a long-distance wireless serial port, allowing wireless operation with no modification to software.


802.15.4 Wireless Compatibility Notes

When using an 802.15.4 communication module, it is essential that you use the ZIGMO_PCB to configure the module settings.

A 802.15.4 Modem will also be required.

900HP-S3B Wireless Compatibility Notes

When using an 900HP-S3B communication module, it is essential that you use the ZIGMO_PCB to configure the module settings.  Long-Range wireless sensors may be programmed over the air without removing the communications module.

A 900HP-S3B Modem or a gateway of some kind that support the 900HP-S3B communications module will also be required.

Bluetooth Compatibility Notes

The default pairing code for NCD Bluetooth devices is 1234.  Users may change the pairing code and other settings, including encryption options, using the ZigMo_PCB, which will provide a USB interface for configuring settings inside the Bluetooth communications module.

Ethernet TCP/IP Compatibility Notes

This device periodically sends UDP Packets on port 13,000, which help identify the IP address of this device on your network.  This device sends UDP Packets to to help users access this device from the internet (this feature can be disable).  Remote access over the internet requires users to configure Port Forwarding on the router that is associated with the WiFi communications module.  Port Forwarding is outside the scope of NCD technical support.  Please visit for instructions on configuring most routers for port forwarding.

RS-232 Serial Compatibility Notes

The NCD RS-232 Serial communications module is compatible with standard RS-232 signals (+/-10VDC), which are not directly compatible with UART signals from a microprocessor.  If you are working with Arduino, Microchip PIC, or other common microcontroller, a communications module is not required.   Microcontrollers will directly talk to the on-board processor of all NCD controllers.

USB Compatibility Notes

This device is compatible with USB communications, which will mount as a Virtual COM Port on your computer.  All device functions will be accessed via the virtual com port using standard serial commands.  The default baud rate is 115.2K Baud for most NCD devices.  USB Drivers are included with most versions of Windows, but users of other operating systems may want to download the latest drivers directly from the FTDI web site.

WiFi Compatibility Notes

When using a WiFi communication module, it is essential that you use the ZIGMO_PCB to configure the WiFi network settings.  This device periodically sends UDP Packets on port 13,000, which help identify the IP address of this device on your network.  This device sends UDP Packets to to help users access this device from the internet (this feature can be disable).  Remote access over the internet requires users to configure Port Forwarding on the router that is associated with the WiFi communications module.  Port Forwarding is outside the scope of NCD technical support.  Please visit for instructions on configuring most routers for port forwarding.

ZigBee® Wireless Compatibility Notes

When using a ZigBee® communication module, it is essential that you use the ZIGMO_PCB to configure the module settings.

A ZigBee Modem will also be required.





Download NCD Base Station

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Would you like a power supply?Change

NCD Controllers Need Power. Standard NCD Power Supplies use a 2.1mm Barrel Connector with 12VDC (center positive) rated at 1.25 Amps (minimum).

Energy Monitor Port 1 Communication OptionsChange

Energy Monitor Port 2 Communication OptionsChange

Do you need to Configure or Remotely Connect to this controller?Change

Use the USB Configuration Adapter if you want to change the settings inside the WiFi, Bluetooth, KFX Key Fob, and Wireless communication modules. You will need a Modem to talk to Wireless and RS-485 devices. You do not need any of these options if you have chosen a Ethernet, RS-232, or USB communications interface above.


We Customize Just for You!!

NCD offers many custom IoT electronic design services to help tailor our product to your exact needs.  Whether you are looking for custom firmware, circuit board modifications, metal enclosures, or industrial color printing, we can help you with a wide variety of design services.

Custom IoT Electronic Design Services Process

Most of our users purchase off-the-shelf hardware for initial testing.  Once everything is working, they contact us to build a custom solution which may include specialized changes to the board, firmware, connectors, etc.  Custom boards have many advantages such as reduced wiring, easy installation, small size, less power consumption, and in some cases, an overall reduction in product cost.  Custom IoT Electronic Design Services will have your company name and logo on the board as well as the enclosure.

Customized IoT Electronics

NCD engineers can help build a customized solution for your particular application based on the designs you see on our website.  We can combine devices onto a single board, change the shape, or even some of the components to meet your exact needs.  We also provide turn-key metal enclosures with powder coating and full-color printing on the top side starting at just $500 for setup!  We have more than 20 years of experience in electronics design and manufacturing.  All of our products are designed and manufactured in the USA, so we are here to support the products we make.  We only ask that our customers prototype their needs using our existing products before we customize.

Customization Guidelines

  • Custom designs should be based on our existing product because we can’t build rockets or electric cars over here!
  • We do not provide customization services if it involves the introduction of a new or untested technology.
  • Custom engineering fees depend on your requirements, so please contact us for a quote!
  • We maintain ownership of all designs, including our customized designs as they are based on our existing Design.
  • We will only ship the customized product to you or your authorized agents.
  • We have an NDA available if needed.
  • The turn-around time is about 2-3 weeks.
  • We specialize in low-volume designs, no quantity is too small!
  • We have the ability to scale to large volumes as needed.

Getting Started with Product Customization

All you have to do is contact us and we will walk you through the process from beginning to end, based on your individual needs.  Some people are surprised at how fast we finish CAD design (usually a few hours), but keep in mind, we still have to build your design, which takes considerably more time.  When we customize product, here are the general services we provide:

  • We design the circuit board.
  • We communicate with our customers throughout the customization and manufacturing process.
  • We manufacture surface mount stencils and circuit boards.
  • We program our pick and place machines to build your boards.
  • We build a working sample and run it through our wave solder machine.
  • We test your custom IoT solution.
  • Once the design is finalized it won’t be possible to make changes during production (changes cost money and require us to repeat the above processes)
  • Once it meets all your requirements, we will start production as needed.
  • We work with our metal fabricators to design a metal enclosure if required.
  • You work with our artist to print the top side of the enclosure in full color with your company logo if required. and ControlEverything Site Migration Notes

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