1-Channel High-Power Relay Controller + 7 GPIO with I2C Interface

Description

This I2C 1-channel high-power 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 QATALYTIC I2C relay controllers have an 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.  The onboard relay is ideally suited for control of high power loads up to an absolute maximum of 30 Amps at 240VAC, depending on the relay chosen during purchase.  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 one 20-Amp SPDT or 30-Amp SPST relay, 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 a DPDT relay.  Seven 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 LED displays the on/off status of the relay.  This controller may be powered using our optional power supply or with 12VDC and direct screw terminal connection of bare power wires.