Features

  • 24-Channel Relay Controller with IoT Interface
  • 8-Channel Programmable TTL/CMOS GPIO
  • Compatible with Electron, Photon, Bluz, or RedBear
  • Adaptable to Onion, PyCom, Raspberry Pi, Arduino
  • MCP23017 I2C Controlled Mechanical SPDT Relays
  • General Purpose Switching with 5 or 10-Amp Relays
  • World’s Most Expandable Controller with I2C Expansion Port
  • Wireless Remote Operation with Key Fob Expansion Option
  • ESP8266 and USB IoT Interface Modules are Also Available
  • IFTTT Firmware Available for Internet Relay Control
  • Example Libraries Available on GitHub

$181.95$193.95

Description

This IoT 24-channel general purpose SPDT relay controller is capable of hosting many types of IoT communication modules, including Particle Photon, Electron, Arduino, and more.  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 dual MCP23017 controllers, a common I2C interface chip for GPIO applications.  In this design, the GPIO port is used to control 24 on-board SPDT relays.  Eight 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.  The I2C bus support up to 8 similar devices (based on the MCP23008 or MCP23017).  This controller counts as two devices on the I2C bus.  Two on-board address jumpers set the I2C start address of both MCP23017 interface chips.  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.

IFTTT

Leverage the power of IFTTT.com and Particle services to do almost anything.  Send a tweet if someone rings your doorbell, send a notification to your phone if someone opens a door, turn on almost anything right from your phone with simple setup, the possibilities are endless.  NCD provides this controller with a pre-programmed Particle Photon module for easy connection to IFTTT.  No programming required!  Just use the simple IFTTT interface to setup your different configurations.

Powered By Particle

Give your Particle Photon the power to interact with the real world in ways never before possible.  Complete with a Particle Photon module pre-flashed with our custom IFTTT firmware, NCD compatible shields allow for control of many types of relays, monitoring digital and analog sensors, and much much more.  Chain I²C accessory boards to your system to add whatever you may need for your next control and automation project.

What is the NCD IoT Interface?

The NCD IoT Interface provides users with a means of changing or upgrading the IoT communications technology as new technologies emerge.  The NCD IoT Interface is directly compatible with Particle Photon for WiFi communications, Electron for Cellular Communications, Bluz for Bluetooth.  Optionally, adapters may be installed to provide a direct interface to Arduino Nano, Micro, USB, PyCom WyPy, Onion Omega, Raspberry Pi, and much more.  The NCD IoT interface allows you to re-use your hardware so it never becomes obsolete!  Based on I2C communications, the NCD IoT Interface uses only 2 GPIO lines of your microcontroller, freeing the rest of your CPU for other tasks.

Unlimited I2C Expansion

Based on our plug-and-play I2C interface standard, all NCD IoT devices are equipped with a I2C expansion 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 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!

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. The first MCP23017 on this circuit board has the address line A0 connected to ground. The second MCP23017 on this circuit board has the address line A0 connected to +5VDC. This prevents on-board address conflicts. The remaining address jumpers A1 and A2 are jumper selectable. Relays are controlled by a MCP23017 using GPIO0:7 on Port A and GPIO0:7 on Port B. Controlling on-board relays is easy: Set GPIO0:7 as Digital Outputs. Next, set the on/off status of GPIO0:7 to activate the corresponding relays. External 8-Channel GPIO port connections are controlled by the second MCP23017 of this controller, with the GPIO mapped to Port B. 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.

IoT Interface Compatibility

NCD IoT 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.  IoT interface devices use I²C as the underlying communications technology.  The notes below will guide you into plugging 3rd party IoT technologies into our devices, we will highlight any adapters that may be required in this section.  Please note that all IoT Interface Devices act as a I²C Master Device, and may be expanded by connecting to any of our Cross-Platform I²C Slave Devices using the I²C Output.

NCD IoT Interface Direct Connection

The following devices directly plug into NCD IoT Interface controllers without a adapter.

If using a Particle Photon or Particle Electron communications module, the PKFR Key Fob Receiver overlay shield may be used to add long-range wireless Key Fob remote control to the communications module.

NCD IoT Interface Adapters

Use the following adapters will adapt the IoT Interface for I2C communications with other popular computing platforms:

Convert IoT to I2C Interface Devices

  • This device may be converted to an I²C slave device using the I2C to IoT Interface Adapter, ideal for use with Raspberry Pi, Beaglebone, Arduino Uno, and BridgeX5.

Arduino Interface

BeagleBone Interface

Banana Pi Interface

C.H.I.P. Interface

Raspberry Pi Interface

Windows 8/10 PC Interface

Key Fob Compatibility

NCD IoT Interface devices are also compatible with a 418MHz Key Fob receiver (Part Number: PKFR), allowing your Particle Electron, Photon, or Bluz to receive and process remote Key Fob commands up to 750 feet away. Up to 40 remote controls may be associated to the PKFR. Program your IoT communications module to receive wireless remote control commands using a Key Fob. Compatible with 1, 2, 3, 4, 5, and 8-Button MS Series Key Fobs from Linx Technologies.

Resources

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Documentation

Tutorials

Datasheets

Documentation Downloads

Official Repository

Community Repositories

Wiring Diagrams

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This item requires 3-5 business days for us to build and test. Larger orders may require additional time.
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Would you like a power supply?Change

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

Would you like a IoT Interface Adapter for this this device?Change

NCD IoT Devices are compatible with many IoT communication technologies using our adapters. Get special discounts on adapters when purchased with our controllers! Please note: Particle Electron, Photon, Bluz, and RedBear plug directly into the IoT Interface connector, and do not require adapters.

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.


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