This I2C 32-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 dual MCP23017 controllers, a common I2C interface chip for GPIO applications.  In this design, the GPIO port is used to control the on-board SPDT relays.  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.

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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.

Product Identification
SKU: PR1-16
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Clear
1+ Pieces
$336.95/ea
10+ Pieces
$323.47/ea
25+ Pieces
$316.73/ea
100+ Pieces
$296.52/ea

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.