Three 40A/240V Relays RS485 Daisy-chainable HAT for Raspberry Pi

SequentSKU: 105527
Sale price £49.20
incl. VAT
excl. VAT
Only 17 units left

Compatible with:

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The Three 40A/240V Relays RS485 Daisy-channable HAT is designed for use with the Raspberry Pi. It features three heavy-duty relays that can handle up to 40A and 240V each, suitable for controlling three-phase industrial loads. The card can be daisy-chained up to 32 units through an RS485 port and is equipped with pluggable connectors, an on-board processor, and LED indicators

It's compatible with all Raspberry Pi versions from Zero to 5. The card requires a 12V power supply and includes reverse power supply protection, a reset push-button, DIN-Rail mounting brackets and screws. It also supports software self-test and comes with all necessary mounting hardware.


  • Three 40A/240V Relays RS485 Daisy-chainable HAT for Raspberry Pi
  • Pluggable Connectors, 26-16 AWG wires for 12V power and RS485
  • Daisy-chainable to 32 cards through RS485 port
  • On-board processor
  • Each relay can switch up to 40A and 240V
  • Heavy duty, 40A/750V terminal block for output contacts
  • RS485/MODBUS Port with TVS protection and dual connectors
  • Reverse polarity power supply protection
  • General purpose push-button
  • LED indicators on each relay
  • All mounting hardware included: stand-offs, screws and nuts
  • DIN-Rail mounting clips included
  • On-board resettable fuse
  • Software self-test
  • Three Relays for Raspberry Pi


  • Power Supply: 12V/8A pluggable connector with reverse polarity protection
  • Contact Configuration: SPST-NO
  • Contact Rating: 40A/277 VAC inductive load, 40A/VAC resistive load, 40A/30DC
  • On/off time: 20ms max each
  • Maximum Operating Frequency:
  • Electrical Endurance: 600 cycles/hour, full load
  • Mechanical Endurance: 18,000 cycles/hour, no load
  • Electrical Life: 50,000 operations minim at 40A 277VAC
  • Mechanical Life: 10,000,000 operations minimum, no load


Package Contents

  • 1x 40A/240V RS485 add-on HAT for Raspberry Pi
  • Mounting hardware
    • 4x M2.5x18mm male-female brass standoffs
    • 4x M2.5x5mm brass screws
    • 4x M2.5 brass nuts
  • Connector Plugs
  • DIN-Rail mounting brackets and screws

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