{"product_id":"sixteen-solid-state-2a-24v-relays-8-layer-stackable-hat-for-raspberry-pi","title":"Sixteen Solid State 2A\/24V Relays 8-Layer Stackable HAT for Raspberry Pi","description":"\u003cp\u003eThis is a copycat of our \u003ca href=\"\/nl\/products\/16-relays-2a-24v-8-layer-stackable-hat-for-raspberry-pi\"\u003e16-Relays HAT\u003c\/a\u003e, for \u003ca href=\"\/nl\/collections\/raspberry-pi-store\"\u003eRaspberry Pi\u003c\/a\u003e with one significant difference: \u003cstrong\u003eSolid State\u003c\/strong\u003e instead of mechanical relays. While mechanical relays are very reliable and have close to zero ohms resistance on contacts, they have a limitation in the number of lifetime cycles.\u003c\/p\u003e\n\u003cp\u003eThe relays we use on the original 16-Relay HAT have a Mechanical Life of 1,000,000 operations. While this might be OK if relays are not triggered too often, what if your application requires 1-second intervals? A relay might engage 3,600 times an hour, or 86.400 times each day. It will run out of cycles in less than 2 weeks, which is a major drawback.\u003c\/p\u003e\n\u003cp\u003eThe 16 Solid State Relays HAT overcomes this limitation, having an infinite number of lifetime cycles.\u003c\/p\u003e\n\u003cp\u003eThe Solid State Relay HAT is software compatible with the 16 Relays HAT and can be stacked up to 8 levels in combination with all \u003ca href=\"\/nl\/collections\/sequent\"\u003eother Sequent Microsystems cards\u003c\/a\u003e equipped with a processor. Perfect when you have to control a large number of loads. Stackable to 8 layers, the card can add up to 128 relays to each Raspberry Pi in a compact form factor.\u003c\/p\u003e\n\u003cp\u003ePluggable connectors make the card easy to use when multiple cards are stacked up too. Bicolour LEDs conveniently grouped on one side of the board show when relays are on or off. A power LED shows when power is applied. A reset switch permits shutting down the Raspberry Pi without the use of a keyboard and monitor.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eRaspberry Pi not included\u003c\/strong\u003e\u003c\/p\u003e\n\u003ch3\u003eCompatibility\u003c\/h3\u003e\n\u003cp\u003eThe card is compatible with all Raspberry Pi versions from Zero to \u003ca href=\"\/nl\/products\/raspberry-pi-5\"\u003eRaspberry Pi 5\u003c\/a\u003e. 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 16-Relay card needs 5V to operate and can be powered from a Raspberry Pi or from its own 2-pin pluggable connector.\u003c\/p\u003e\n\u003cp\u003eThe card draws 20mA. If power is applied to the board's connector, no other power supply is needed for the Raspberry Pi.\u003c\/p\u003e\n\u003ch3\u003eLED Indicators\u003c\/h3\u003e\n\u003cp\u003eA power LED shows when power is applied to the board. Due to space limitations, bicolour LEDs are used to show the status of groups of 8 relays.\u003c\/p\u003e\n\u003ch3\u003eDIP Switch Configuration\u003c\/h3\u003e\n\u003cp\u003eA six-position DIP switch is used to select the source of the RS485 port and the position of the card in the stack if multiple cards are used.\u003c\/p\u003e\n\u003ch3\u003eStacking Multiple Cards\u003c\/h3\u003e\n\u003cp\u003eUp to eight cards can be stacked on your Raspberry Pi. The three left positions of the DIP Switch are used to select the stack level.\u003c\/p\u003e\n\u003ch3\u003eRS485\/MODBUS Port\u003c\/h3\u003e\n\u003cp\u003eThe 16 Solid State Relay Card has an RS485 port which can be driven from the Raspberry Pi, or the local processor. Leave the TX and RX switches in the OFF position to connect the port to the local processor. Set both to ON to connect to USART1 of the Raspberry Pi.\u003c\/p\u003e\n\u003cp\u003eWhen DIP Switches are ON, Raspberry Pi can communicate with any device with an RS485 interface. In this configuration, the card is a passive bridge which implements only the hardware levels required by the RS485 protocol. To use this configuration, you need to tell the local processor to release control of the RS485 bus:\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e~$ 16relind [0] rs485wr 0 0 0 0 0\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eWhen DIP Switches are OFF, the card operates as MODBUS slave and implements the MODBUS RTU protocol. Any MODBUS master can access all the card's inputs and set all the outputs using standard MODBUS commands. A detailed list of commands implemented and parameter addresses can be found on GitHub:\u003c\/p\u003e\n\u003cp\u003eIn both configurations the local processor needs to be programmed to release (jumpers installed) or control (jumpers removed) the RS485 signals. See the command line online help for further information.\u003c\/p\u003e\n\u003ch3\u003eRS485 Terminator\u003c\/h3\u003e\n\u003cp\u003eThe last position on the DIP switch is the RS485 line terminator. Set it to ON if the card is last on the RS485 chain.\u003c\/p\u003e\n\u003ch3\u003eReverse Power Supply Protection\u003c\/h3\u003e\n\u003cp\u003eThe board is protected from accidental reverse power supply with a 5.8A, 39 mOhm MOSFET which breaks the ground line if reverse power is applied.\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 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\u003ch3\u003eHardware Watchdog\u003c\/h3\u003e\n\u003cp\u003eThe card contains a built-in hardware watchdog which will guarantee that your mission-critical project will recover and continue running even if Raspberry Pi software hangs up. After power up the watchdog is disabled, and becomes active after it receives the first reset or first-period set.\u003c\/p\u003e\n\u003cp\u003eThe default timeout is 120 seconds. Once activated, if it does not receive a subsequent reset from Raspberry Pi within 2 minutes, the watchdog cuts the power and restores it after 10 seconds.\u003c\/p\u003e\n\u003cp\u003eRaspberry Pi needs to issue a reset command on the I2C port before the timer on the watchdog expires. The timer period after power-up and the active timer period can be set from the command line. The number of resets is stored in flash and can be accessed or cleared from the command line. All the watchdog commands are described by the online help function.\u003c\/p\u003e\n\u003ch3\u003eDIN-Rail Mounting\u003c\/h3\u003e\n\u003cp\u003eThe 16-Relays Card can be installed parallel on a DIN-Rail using the \u003ca href=\"\/nl\/products\/din-rail-kit-for-raspberry-pi\"\u003eDIN-Rail Kit Type 1\u003c\/a\u003e, or perpendicular using the \u003ca href=\"\/nl\/products\/din-rail-kit-type-2-perpendicular-to-rail-for-raspberry-pi\"\u003eDIN-Rail Kit Type 2\u003c\/a\u003e.\u003c\/p\u003e\n\u003ch2\u003eFeatures\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eSixteen Solid State Relays 2A\/24V 8-Layer Stackable HAT for Raspberry Pi\u003c\/li\u003e\n\u003cli\u003eAll Relays with Status LEDs and N.O. contacts\u003c\/li\u003e\n\u003cli\u003eEight layer stackable to 128 Solid State Relays\u003c\/li\u003e\n\u003cli\u003ePluggable Connectors 26-16 AWG wires\u003c\/li\u003e\n\u003cli\u003e5V power supply with reverse polarity protection\u003c\/li\u003e\n\u003cli\u003eOn board hardware watchdog\u003c\/li\u003e\n\u003cli\u003eRS485 Port\u003c\/li\u003e\n\u003cli\u003eGeneral purpose push-button\u003c\/li\u003e\n\u003cli\u003e8 LEDs showing status of groups of 8 relays\u003c\/li\u003e\n\u003cli\u003eSoftware self-test\u003c\/li\u003e\n\u003cli\u003eSixteen Solid State Relays Raspberry Pi\u003c\/li\u003e\n\u003cli\u003eUses only I2C port, all GPIO pins available\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\u003c\/ul\u003e\n\u003ch2\u003eSpecifications\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003ePower Supply: 5V\/8A pluggable connector with reverse polarity protection\u003c\/li\u003e\n\u003cli\u003eOn board resettable fuse: 3A\u003c\/li\u003e\n\u003cli\u003eRelays: NO contacts, 2.0A\/24 VAC\/DC\u003c\/li\u003e\n\u003cli\u003eRon resistance: 60mΩ typ.\u003c\/li\u003e\n\u003cli\u003eOff-state leakage current: max. 1μA\u003c\/li\u003e\n\u003cli\u003eTurn On Time: 1.5mS max.\u003c\/li\u003e\n\u003cli\u003eTurn Off Time: 0.5mS max.\u003c\/li\u003e\n\u003cli\u003eLoad Current: 2.5A max.\u003c\/li\u003e\n\u003cli\u003ePeak Load Current: 5A 100mS pulse\u003c\/li\u003e\n\u003cli\u003eElectrical and Mechanical endurance: unlimited\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eResources\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003ca href=\"https:\/\/sequentmicrosystems.com\/pages\/sixteen-relays-downloads\"\u003eDownloads\u003c\/a\u003e\n\u003cul\u003e\n\u003cli\u003e\u003ca title=\"16-Relays User's Guide\" href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0534\/4392\/0067\/files\/16-RELAYS-UsersGuide_d5e24457-bdd9-4e16-a307-7f90bbd668bb.pdf?v=1690473909\" class=\"text-link\" rel=\"noopener\" target=\"_blank\"\u003eUser's Guide V1.0\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca title=\"Sixteen RELAYS Card Schematics\" href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0534\/4392\/0067\/files\/16-RELAYS-Schematic.pdf?v=1679586426\" class=\"text-link\" rel=\"noopener\" target=\"_blank\"\u003eHardware Schematic V2.0\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0534\/4392\/0067\/files\/16-RELAYS-Schematic-V4_1.pdf?v=1702175917\" title=\"Sixteen Relays for Raspberry Pi Schematics\" rel=\"noopener noreferrer\" class=\"text-link\" target=\"_blank\"\u003eHardware Schematic V4.1\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca title=\"3D Printing Enclosure\" href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0534\/4392\/0067\/files\/3DPrinting.zip?v=1627324035\" class=\"text-link\" rel=\"noopener\" target=\"_blank\"\u003e3D Printing Enclosure\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca title=\"16-RELAYS 2D-CAD Drawing\" href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0534\/4392\/0067\/files\/16-RELAYS-V2.dxf?v=1643335157\" class=\"text-link\" rel=\"noopener\" target=\"_blank\"\u003e2D CAD Drawing\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0534\/4392\/0067\/files\/16-Relays-V4_1-3D-STEP.zip?v=1702176094\" title=\"16-Relays for Raspberry Pi 3D STEP Model\" rel=\"noopener noreferrer\" class=\"text-link\" target=\"_blank\"\u003eV4.1 3D STEP Model\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca title=\"Sequent Microsystems Sixteen Relays HAT Command Line Interface\" href=\"https:\/\/github.com\/SequentMicrosystems\/16relind-rpi\" class=\"text-link\" rel=\"noopener\" target=\"_blank\"\u003eCommand Line\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca title=\"Sequent Microsystems Sixteen Relays HAT\" href=\"https:\/\/github.com\/SequentMicrosystems\/16relind-rpi\/blob\/main\/python\/README.md\" class=\"text-link\" rel=\"noopener\" target=\"_blank\"\u003ePython Libraries\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/github.com\/SequentMicrosystems\/16relind-rpi\/blob\/main\/node-red-contrib-sm-16relind\/README.md\" title=\"Sequent Microsystems Sixteen Relays 8-Layer Stackable HAT for Raspberry Pi Node-RED nodes\" class=\"text-link\" rel=\"noopener\" target=\"_blank\"\u003eNode-RED nodes\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca title=\"RoHS and REACH Compliance Declaration\" href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0534\/4392\/0067\/files\/RoHS-and-REACH-Compliance-16-RELAYS.pdf?v=1679586534\" class=\"text-link\" rel=\"noopener\" target=\"_blank\"\u003eRoHS and REACH Compliance Declaration\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/openplcproject.com\/\" title=\"OpenPLC\" class=\"text-link\" rel=\"noopener\" target=\"_blank\"\u003eOpenPLC module\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/github.com\/SequentMicrosystems\/SM16relind-ha\" title=\"Sequent Microsystems Sixteen Solid State Relays Home Assistant integration\" rel=\"noopener\" class=\"text-link\" target=\"_blank\"\u003eHome Assistant Integration\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eQuick Start\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003ePlug your 16-Solid State Relays 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 16-RELAYS software from github.com:\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003e~$ git clone https:\/\/github.com\/SequentMicrosystems\/16relind-rpi.git\u003c\/strong\u003e\u003cbr\u003e\u003cstrong\u003e~$ cd \/home\/pi\/16relind-rpi\u003c\/strong\u003e\u003cbr\u003e\u003cstrong\u003e~\/16relind-rpi$ sudo make install\u003c\/strong\u003e\u003cbr\u003e\u003cstrong\u003e~\/16relind-rpi$ 16relind\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe program will respond with a list of available commands.\u003c\/p\u003e\n\u003ch3\u003eSoftware Interfaces\u003c\/h3\u003e\n\u003cp\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. You can drag-and-drop the functional blocks to design your application. Examples are provided at GitHub.\u003c\/p\u003e\n\u003ch3\u003eRelay Self-test\u003c\/h3\u003e\n\u003cp\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. The lighting of the LEDs will assure that all relays are functioning.\u003c\/p\u003e\n\u003ch2\u003ePackage Contents\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e1x Sixteen Solid State Relays HAT\u003c\/li\u003e\n\u003cli\u003e4x M2.5x18mm male-female brass standoffs\u003c\/li\u003e\n\u003cli\u003e4x M2.5x5mm brass screws\u003c\/li\u003e\n\u003cli\u003e4x M2.5 brass nuts\u003c\/li\u003e\n\u003cli\u003e11x Connector plugs\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eRaspberry Pi not included\u003c\/strong\u003e\u003c\/p\u003e","brand":"Sequent","offers":[{"title":"Default Title","offer_id":50847196021009,"sku":"106012","price":68.9,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0901\/6285\/6209\/files\/sixteen-solid-state-2a-24v-relays-8-layer-stackable-hat-for-raspberry-pi-sequent-106012-71238326714753.jpg?v=1735208246","url":"https:\/\/abcd3032.myshopify.com\/nl\/products\/sixteen-solid-state-2a-24v-relays-8-layer-stackable-hat-for-raspberry-pi","provider":"Tayyab Zak","version":"1.0","type":"link"}