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Features

  • 2-Channel Relay Controller with I2C Interface
  • 6-Channel Programmable Digital Input/Output (GPIO)
  • Ideal for use with PC using Windows 8/10 via USB
  • Compatible with Arduino, Raspberry Pi, Onion, PyCom
  • MCP23008 I2C Controlled Mechanical SPDT Relays
  • General Purpose Switching with 5 or 10-Amp Relays
  • I2C Output Port for Adding Sensors, Controllers, or More Relays
  • Wireless Remote Operation with Key Fob Expansion Option
  • Example Libraries Available on GitHub

$42.95$44.95

Description

This I2C 2-channel general purpose SPDT relay controller offers a cross-platform solution with unmatched compatibility and expansion capabilities.  Compatible with every IoT technology that supports I2C communications, this is the most versatile relay controller we have ever manufactured.  All NCD I2C relay controllers have a I2C output, allowing you to chain together more relay controllers, a vast array of sensors, current monitors, PWM drivers, and much more.  The expansion abilities of this relay board are unmatched by any other manufacturer in the world.  On-board SPDT relays are ideally suited for control of low to medium power loads up to an absolute maximum 10 Amps at 240VAC depending on relay chosen during purchase. NCD SPDT relay controllers have three connection terminals for user-access to each relay.  This design is suitable for some mildly inductive loads when used with external induction suppression capacitors, but focuses primarily on resistive load switching.  This controller includes 5 or 10-Amp SPDT relays, customized when added to your shopping cart.

This controller is based on the MCP23008, a common I2C interface chip for GPIO applications.  In this design, the GPIO port is used to control 2 on-board SPDT relays.  Six programmable Digital Input/Output port pins are also available via screw terminals for use in Contact Closure detection applications or monitor and control external TTL circuits.  Three on-board address jumpers allow up to 8 similar devices (based on the MCP23008 or MCP23017) to be chained to the same I2C bus for individual control.  On-board status LEDs display the on/off status of each relay.  This controller may be powered using our optional power supply or with 12VDC and direct screw terminal connection of bare power wires.  Each relay is accessible to the user via screw terminals, capable of accepting 12 AWG wire.

nodeLynk Device

This is a nodeLynk device, it will require a nodeLynk Master Adapter for proper operation.  nodeLynk devices plug into Master microprocessors to easily add hardware sensing and control capabilities.

What is nodeLynk?

Chain expansion devices using nodeLynk. Connect a wide variety of accessories to expand the capabilities of a nodeLynk compatible controller.  Use nodeLynk to add Relay Controllers, Sensors, PWM Drivers, Displays, and a wide variety of 4-20mA, 0-10V ADCs and DACs, as well as a wide array of TTL & Isolated GPIO devices.  All nodeLynk devices use I2C communications to chain devices together.  nodeLynk is an easy way to expand functionality without soldering.  nodeLynk allows expansion in seconds so you can focus on your software and firmware development.

What is the nodeLynk I2C Interface?

NCD is the creator of plug and play modular hardware using nodeLynk, which is hardware I2C Interface connector standard.  nodeLynk I2C devices allow you to chain together several devices on the I2C bus, and communicate to each device individually at high speed (subject to the limitations of I2C).  The nodeLynk I2C Interface uses a standard 4-Pin I2C Input and I2C Output connector.  nodeLynk I2C devices communicate 5V I2C data and provides 5V DC power through this connector.  nodeLynk I2C devices use standard I2C communications for all data transport, which is supported by nearly every microcontroller in production today.  The nodeLynk I2C Interface is strictly a 5V standard, which is ideal for transport across longer cables.  nodeLynk I2C devices always include a 6″ (152mm) 4-conductor I2C cable.  nodeLynk I2C Mini Modules always include a 3″ (76mm) 4-conductor I2C cable.  Cables and connectors are available separately for designers who would like to include their own nodeLynk I2C Interface into their designs.

Plug and Play Connectivity

nodeLynk I2C devices will plug in to any available nodeLynk I2C Output.  This includes just about everything we make in the NCD IoT Category, including all NCD IoT devices.  We also manufacture a wide range of I2C adapters that make it easy to plug nodeLynk I2C Devices directly into most computing platforms.  nodeLynk I2C Interface adapters are available for Arduino, Banana Pi, BeagleBone, Bluz, ESP8266, Onion Omega, Particle Photon and Electron, PyCom, Raspberry Pi, 2, 3, and Zero, and Windows.  We are always working to add new platform support for nodeLynk I2C devices.  nodeLynk I2C Interface devices are compatible with just about everything in the microcontroller industry.

Unlimited I2C Expansion

Based on our plug-and-play I2C interface standard, all nodeLynk I2C devices are equipped with a I2C output port, making it easy to expand to a wide variety of sensors, current monitors, relay controllers, PWM controllers, and much more!  We are always designing new expansions for our modular plug-and-play I2C framework.  We are dedicated to building a product line of interconnected devices to simplify all forms of automation.  Re-use or upgrade your hardware in seconds by selecting the modules that best fit your needs, and chaining them together using the included I2C expansion cables!

A Raspberry Pi (above) is connected to a nodeLynk Master adapter.  nodeLynk devices are chained to the Raspberry Pi nodeLynk Master using I2C communications.  Each nodeLynk device must have a different I2C address for proper operation of the chain.  Note that some nodeLynk I2C devices have a fixed address while others allow configuration of the address across a limited range of addresses.

Powering nodeLynk I2C Interface Devices

Some nodeLynk I2C devices require a external power supply, others may be powered through the 4-Pin I2C bus connector at 5VDC, and other devices are jumper selectable between external and I2C bus power.  All I2C mini modules are powered through the 5V I2C bus connector, greatly simplifying connectivity.

10-Amp SPDT Relay Option

This controller is available with a 10-Amp relay option, allowing control of higher-power loads up to an absolute maximum of 240VAC at 10 Amps. Ideal for general purpose switching applications, this relays is focused on power-switching, and should never be used for low-power signals due to a higher On resistance of up to 150 Ohms when relay contacts are new (contact resistance drops to less than 1 Ohm after break-in period). The 10-Amp relay is of the SPDT variety, which provides Common (C), Normally Open (NO), and Normally Closed (NC) connections. Common is connected to NC when the relay is off. Common disconnects from NC and connects to NO when the relay is activated.  All connections are made via screw terminals, capable of accepting up to 12 AWG wire.

5-Amp SPDT Relay Option

This controller is available with a 5-Amp relay option, allowing control of higher-power loads up to an absolute maximum of 240VAC at 5 Amps. Ideal for general purpose switching applications, this relays is focused on power-switching, and should never be used for low-power signals due to a higher On resistance of up to 150 Ohms when relay contacts are new (contact resistance drops to less than 1 Ohm after break-in period). The 5-Amp relay is of the SPDT variety, which provides Common (C), Normally Open (NO), and Normally Closed (NC) connections. Common is connected to NC when the relay is off. Common disconnects from NC and connects to NO when the relay is activated.  All connections are made via screw terminals, capable of accepting up to 12 AWG wire.

Compatibility

Integration Notes

All relays on this device are of the SPDT variety, providing 3 connections to each relay: Common, Normally Closed, and Normally Open. The Common connection is always connected to the Normally Closed connection when the relay is off. When the relay switches on, the Common connection is disconnected from the Normally Closed and Connected to the Normally Open. External loads may be wired to be off all the time and turn on when the relay turns on. Optionally, external loads may be wired to be on all the time, with the external load switching off when the relay is activated. Relays are rated at 10 Amps 250VAC or 10 Amps at 24VDC. Relays are controlled using the MCP230xx Series Programmable GPIO Port Expanders from Microchip Technology. Relays are controlled by a MCP23008 using GPIO0:1, GPIO 2:7 are available for user interface via screw terminals. Controlling on-board relays is easy: Set GPIO0:1 as Digital Outputs. Next, set the on/off status of GPIO0:1 to activate the corresponding relays. LEDs indicate the status of on-board relays. All of these operations are handled for you when using the drivers supplied in our GitHub repository (ControlEverythingCom). Induction suppression capacitors are strongly advised for inductive switching applications (anything that generates a magnetic field). Induction suppression capacitors will prolong the life of the relays and help prevent malfunctions when switching high voltages.

I2C Interface Compatibility

NCD I2C Interface devices are designed to plug in to many popular IoT computing platforms.  This allows the “brains” from other manufacturers to directly plug into our devices for easy plug-and-play operation.  I2C interface devices use I²C as the underlying communications technology.  The notes below will guide you into plugging 3rd party technologies into our devices, we will highlight any adapters that may be required in this section.  Please note that all NCD I2C Interface Devices can be chained together to any other Cross-Platform I²C Slave Devices using the I²C Output.  Additionally, NCD I2C devices may be plugged into the I2C Output of NCD IoT Interface devices.  A complete list NCD I2C Interface adapters is available by clicking here.

Arduino Interface

Banana Pi Interface

BeagleBone Interface

Bluz Bluetooth Interface

C.H.I.P. Interface

ESP8266 Interface

Particle Interface

Onion Omega 1 & 2 Interface

PyCom Interface

Raspberry Pi Interface

Windows 8/10 PC USB Interface

Resources

Essential

Tutorials

Datasheets

Documentation Downloads

Community Repositories

Official Repository

Drawings

Wiring Diagrams

Click to Enlarge
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Videos

Introduction to Relay Control

This video will guide you in determining which relay controller you need for your application as well as a general overview of the differences between Relay Options. If you're new to our products or just need a refresher for a new application this is a great place to start.

This video will guide you in determining which relay controller you need for your application as well as a general overview of the differences between Relay Options. If you're new to our products or just need a refresher for a new application this is a great place to start.

See More

Induction Suppression

Learn about Induction and how it comes into play with Relay Controllers. Induction suppression can make your Relay Control applications intermittent and unreliable. This video will show you what causes it, how to avoid it, and how to account for it in your application.

Learn about Induction and how it comes into play with Relay Controllers. Induction suppression can make your Relay Control applications intermittent and unreliable. This video will show you what causes it, how to avoid it, and how to account for it in your application.

See More

Buy Now

This product qualifies for:

  • Forum Support (fastest)
  • Direct Email Support

Standard Lead Times

Standard lead times are 3-5 business days as we manufacture and test the product at the time of order. Larger orders may require additional time.

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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).

I2C Interface OptionsChange

NCD I2C Devices can plug directly into our IoT Interface Devices, but many users prefer to start small. Below, you will see a list of common interface shields that make it easy to plug our I2C devices into your favorite computing platform. Take advantage of our special discounts when buying our interface shields with our I2C devices.

Do you need Induction Suppression Capacitors?Change

Induction Suppression Capacitors are essential for managing inductive loads such as Motors, Solenoids, and other Electronic Devices that implement a collapsible magnetic field.  These capacitors will reduce the chances of Electromagnetic Interference with our controller and prolong the operational life of relays.


Customize

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.

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