PES-2601 4-Port Relay Smart Expansion Board for PHPoC Shield 2

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  • Regular price $45.00
  • Will be in stock after

This PES-2601 4-Port Relay Board is a Smart Expansion board for PHPoC P4S-347 or P4S-348 V2 Shields which is designed to control on/off high-voltage devices.

After stacking on a PHPoC V2 Shield with an Arduino Uno or Mega, this board can be controlled by Arduino using the PHPoC library.

Each PES-2601 4-port Relay Board carries four relays. A single Arduino Uno/Mega can carry multiple 4-port Relay Boards.

Two different types of terminal blocks are available, based on the direction of the terminal screws. S-type can be screwed from the side, convenient when the multiple boards are stacked. T-type is screwed from the top of the board. The wire termination blocks are on the side of the board in both models.

PHPoC Smart Expansion Boards for ArduinoThe Smart Expansion board family for PHPoC V2 Shields provide the additional hardware and firmware to boost Arduino Uno and Mega microcontrollers with advanced capabilities (e.g. control high-voltage devices, control/monitor motors with high accuracy).

They communicate with Arduino Uno/Mega via a definite set of commands and need to be stacked above a PHPoC [WiFi] Shield 2 (P4S-347 V2 or P4S-348 V2), firmware version of 1.4.0 or above, in order to interface with Arduino.


  • 4 Relays: Settable NC (Normal Close) or NO (Normal Open)
  • Maximum Voltage: DC 30V
  • Maximum Current: 2A each relay
  • 1x8 5mm Pitch Terminal Block: S type, T type
  • DIP Switch to Set Address (ID)

Delivery is stock to 2 weeks, if the item is out of stock, please contact us for availability. 

Documentation & Resources

PES-2601 4-Port Relay Smart Expansion Board for PHPoC Shield 2 Web Page