Dual DC Solid State Relay with EFM Processor and Dual RS232 Interfaces

  • 1995



This module contains Dual CPC1002N DC Solid State Relays. A Solid State Relay (SSR) is a voltage controlled switch. It lets you control a big voltage with a little voltage. Think of a light switch. Your finger turns the light on by mechanically moving the switch so that the big voltage can go to the light. With a solid state relay a low voltage of less than 2 volts can control a high voltage like 240 volts. A light switch isolates the high voltage from your finger, the SSR isolates the high voltage from the low voltage control signal. This lets you control a high voltage device from a microcontroller.

This relay is a low voltage relay used for DC current applications.

It also contains an EFM32ZG108 Gecko low power microcontroller and two RS232 serial ports allowing it to be daisy chained in a network. Pre-Programmed for use in an openHAB Home Automation system or can be Re-Programmed for other uses.



  • Dual CPC1002N DC Solid State Relays
    • 0.7A Load Current
    • 60V Blocking Voltage (This is an Absolute Maximum - better stay below this)
    • 0.55 Ohm On-Resistance
    • Only 2mA of LED current required to operate
    • Arc-Free With No Snubbing Circuits
    • 1500V RMS Input/Output Isolation
    • Normally Open
  • +3.6V to +6V Input Voltage
  • EFM32ZG108 Gecko Microcontroller
    • ARM Cortex-M0+
    • Low Power Operation
    • 32KB Flash Memory
    • 4KB RAM
  • MAX3232 Dual RS232 Line Driver/Receiver
  • Two 4 Pin DF11 Right Angle Male Connectors each with Power and RS232
  • 6 Pin DF11 Right Angle Male Connector for Programming and Debug
  • Pre-Programmed with openHAB Item Firmware for Plug-and-Play
  • Pre-Programmed Firmware is Designed for Low Power Operation
  • May be Programmed with the Arduino IDE
  • Small Size: PCB is 20mm x 20mm (0.79" x 0.79")


  • Home Automation - Garage Door Controllers
  • Home Automation - Electrically Controlled Locks
  • Allow a microcontroller to control higher voltages and currents
  • Electronic switching

Eagle Files
CPC1002N DC Solid State Relay Data Sheet


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