{"product_id":"8-relays-4a120v-8-layer-stackable-hat-for-raspberry-pi-v60-discontinued","title":"8 Relays 4A\/120V 8-Layer Stackable HAT for Raspberry Pi (v6.0) [Discontinued]","description":"\u003cp\u003eThe perfect add-on for your project when you have to control large number of loads. Stackable to 8 layers, the card can add up to 64 relays to each Raspberry Pi in a compact form factor - now with a Home Assistant integration!\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003ePluggable connectors make the Eight Relays card easy to use when multiple cards are stacked up. All relays have \u003cstrong\u003eNO and NC contacts\u003c\/strong\u003e and can switch \u003cstrong\u003e120VAC\/4A or 24VDC\/4A\u003c\/strong\u003e.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eStatus LEDs\u003c\/strong\u003e conveniently grouped on one side of the board show when relays are on or off. A \u003cstrong\u003epower LED\u003c\/strong\u003e shows when power is applied. A \u003cstrong\u003ereset switch\u003c\/strong\u003e permits shutting down the Raspberry Pi without the use of a keyboard and monitor.\u003c\/p\u003e\n\u003ch2\u003eFeatures\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eStatus LEDs and NO\/NC contacts\u003c\/li\u003e\n\u003cli\u003eEight layer stackable to 64 relays\u003c\/li\u003e\n\u003cli\u003ePluggable Connectors 26-16 AWG wires\u003c\/li\u003e\n\u003cli\u003e120VAC\/4A or 24VDC\/4A on each contact\u003c\/li\u003e\n\u003cli\u003eRS485 Port\u003c\/li\u003e\n\u003cli\u003eGeneral purpose push-button\u003c\/li\u003e\n\u003cli\u003eLED indicators on each relay\u003c\/li\u003e\n\u003cli\u003eSoftware self-test\u003c\/li\u003e\n\u003cli\u003eUses only I2C port (address 0x20..0x27 or 0x38..0x3f ), all GPIO pins available\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eWorks with any Raspberry Pi from  ZERO to 5\u003c\/li\u003e\n\u003cli\u003eECCN Code EAR99\u003c\/li\u003e\n\u003cli\u003e64 Stations Irrigation Controller using Node-RED\u003c\/li\u003e\n\u003cli\u003eCommand Line\u003c\/li\u003e\n\u003cli\u003ePython Library\u003c\/li\u003e\n\u003cli\u003eNode-Red nodes\u003c\/li\u003e\n\u003cli\u003eOpenPLC module\u003c\/li\u003e\n\u003cli\u003eHome Assistant Integration\u003c\/li\u003e\n\u003cli\u003eCODESYS Driver\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eCompatibility\u003c\/h3\u003e\n\u003cp\u003eThe Eight Relays card is compatible with all Raspberry Pi versions from Zero to 5. All stacked cards share the I2C bus using only two of the Raspberry Pi’s GPIO pins to manage all eight cards.  This feature leaves the remaining 24 GPIOs available for the user.\u003c\/p\u003e\n\u003ch3\u003ePower Requirements\u003c\/h3\u003e\n\u003cp\u003eThe Eight Relays card needs 5V to operate and can be powered from Raspberry Pi or from it's own 2 pin pluggable connector.\u003c\/p\u003e\n\u003cp\u003eThe relay coils are also powered from the 5V.  The card draws 10mA with all relays off. Each relay needs about 80 mA to turn on. If power is applied to the board's connector, no other power supply is needed for the Raspberry Pi.\u003c\/p\u003e\n\u003ch3\u003eStacking Multiple Cards\u003cbr\u003e\n\u003c\/h3\u003e\n\u003cp\u003eUp to eight cards can be stacked on your Raspberry Pi. Three positions of the configuration DIP Switch labeled ID0, ID1, ID2 are used to select the stack level. Cards can be stacked in any order.\u003c\/p\u003e\n\u003ch3\u003eReset Pushbutton\u003c\/h3\u003e\n\u003cp\u003eShutting down the Raspberry Pi by turning off the power can result in SD Card failure. To prevent this, a shutdown command needs to be used before power cut-off. But this requires a monitor, keyboard and mouse connected to the Pi.\u003c\/p\u003e\n\u003cp\u003eA momentary on push button installed at the edge of the board provides a convenient way to shut down the Raspberry Pi. The button is routed to pin 37 (GPIO 26). You need to write a script which monitors this pin, and if pressed for more than a desired time, issues the shut-down command.\u003c\/p\u003e\n\u003ch2\u003eElectrical Specifications\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003ePower Supply: 5V\/8A pluggable connector\u003c\/li\u003e\n\u003cli\u003eOn board resettable fuse: 5A\u003c\/li\u003e\n\u003cli\u003eRelays: NO\/NC contacts, 4A\/120 VAC - 24 VDC\u003c\/li\u003e\n\u003cli\u003eElectrical endurance: minim 105 cycles at 1,800 operations per hour, full load\u003c\/li\u003e\n\u003cli\u003eMechanical endurance: minim 107 cycles at 18,000 operations per hour, no load\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eResources\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eDownloads page\u003c\/li\u003e\n\u003cli\u003e64 Stations Irrigation Controller using Node-RED\u003c\/li\u003e\n\u003cli\u003eCommand Line\u003c\/li\u003e\n\u003cli\u003ePython Library\u003c\/li\u003e\n\u003cli\u003eNode-Red nodes\u003c\/li\u003e\n\u003cli\u003eOpenPLC module\u003c\/li\u003e\n\u003cli\u003eHome Assistant Integration\u003c\/li\u003e\n\u003cli\u003eCODESYS Driver\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eQuick Start\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003ePlug your card on top of your Raspberry Pi and power up the system.\u003c\/li\u003e\n\u003cli\u003eEnable I2C communication on Raspberry Pi using raspi-config.\u003c\/li\u003e\n\u003cli\u003eInstall the 8-RELAYS software from github.com:\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003e~$ git clone https:\/\/github.com\/SequentMicrosystems\/8relind-rpi.git\u003c\/strong\u003e\u003cbr\u003e\u003cstrong\u003e~$ cd \/home\/pi\/8relind-rpi\u003c\/strong\u003e\u003cbr\u003e\u003cstrong\u003e~\/8relind-rpi$ sudo make install\u003c\/strong\u003e\u003cbr\u003e\u003cstrong\u003e~\/8relind-rpi$ 8relind\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe program will respond with a list of available commands.\u003c\/p\u003e\n\u003ch3\u003eSoftware\u003c\/h3\u003e\n\u003cdiv\u003eYou can write your own application using the Command Line or Python Libraries provided. No programming is required if you use the Node-Red nodes we supply.\u003c\/div\u003e\n\u003cdiv\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003cdiv\u003eYou can drag-and-drop the functional blocks to design your application. Examples are provided at GitHub.\u003cbr\u003e \u003c\/div\u003e\n\u003ch3\u003eRelay Self-Test\u003c\/h3\u003e\n\u003cdiv\u003eThe card can be tested before installation by running a simple command from the command line. The card will cycle each relay on and off at 0.5 seconds interval.\u003c\/div\u003e\n\u003cdiv\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003cdiv\u003eThe clacking noise of the relays and the lighting of the LEDs will assure that all relays are functioning.\u003c\/div\u003e\n\u003cdiv\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003ch3\u003eAccessories\u003c\/h3\u003e\n\u003cp\u003ecard can be installed parallel on a DIN-Rail using the\u003cspan\u003e \u003c\/span\u003eDIN-Rail Kit Type 1, or perpendicular using the DIN-Rail Kit Type 2.\u003c\/p\u003e\n\u003ch2\u003ePackage Contents\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e1x 8 Relays HAt\u003c\/li\u003e\n\u003cli\u003e11x Connector plugs\u003c\/li\u003e\n\u003cli\u003e1x Mounting hardware pack\n\u003cul\u003e\n\u003cli\u003eFour M2.5x18mm male-female brass standoffs\u003c\/li\u003e\n\u003cli\u003eFour M2.5x5mm brass screws\u003c\/li\u003e\n\u003cli\u003eFour M2.5 brass nuts\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eRevision History\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eAs of 27\/02\/2025\u003c\/strong\u003e we are now stocking version 6.0\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Sequent","offers":[{"title":"Default Title","offer_id":48624184688858,"sku":"tds1789685955746","price":40.38,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0824\/8318\/3834\/files\/8-relays-4a120v-8-layer-stackable-hat-for-raspberry-pi-v60-discontinued_1.jpg?v=1789685963","url":"https:\/\/memoryfoamwear.shop\/products\/8-relays-4a120v-8-layer-stackable-hat-for-raspberry-pi-v60-discontinued","provider":"My Store","version":"1.0","type":"link"}