This IoT 2-channel low-power signal 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 low-power signal switching applications, up to 1 Amp at 12VDC.  NCD SPDT relay controllers have three connection terminals for user-access to each relay.  We use high-quality Omron relays with a low on-resistance between contacts.  Designed primarily for resistive or mildly capacitive low-power signals, the on-board relays in this design focus on signal integrity, making it an ideal choice for telecommunications and low-power audio switching applications.

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 14 AWG wire.

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.

Product Identification
SKU: PR16-28
UPC: 689860065871
Country of Origin: US
HTS Code: 854231
1+ Pieces
$52.95/ea
10+ Pieces
$50.83/ea
25+ Pieces
$49.77/ea
100+ Pieces
$46.60/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).

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.