{"product_id":"eight-hv-digital-inputs-8-layer-stackable-hat-for-raspberry-pi-v40-discontinued","title":"Eight HV Digital Inputs 8-Layer Stackable HAT for Raspberry Pi (v4.0) [Discontinued]","description":"\u003cp\u003eThe Raspberry Pi can read 26 input signals through the GPIO header, but these pins are wired directly to the local processor. Additional hardware can be required to connect them to real-world things at real-world voltages!\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eThis card has eight optically isolated digital inputs, \u003cstrong\u003efrom 3V-24V or 48V-240V\u003c\/strong\u003e. \u003cstrong\u003eInputs can read both DC and AC signals.\u003c\/strong\u003e Separate input pins are provided for low or high-voltage ranges\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e The card communicates with Raspberry Pi using only the I2C port, leaving all the other 24 GPIO pins available for your use. It has also an RS-485 port, a power LED and a push-button that can be used to shut down the Raspberry Pi.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003ePluggable connectors make the card easy to use when multiple cards are stacked up.\u003c\/p\u003e\n\u003cp\u003eA 16 Inputs card is also available, however please be aware that the voltage ranges are lower.\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eFor any technical questions about this product please email \u003c\/span\u003esupport@sequentmicrosystems.com\u003c\/p\u003e\n\u003ch2\u003eFeatures\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eEight HV (high-voltage) universal opto-isolated inputs 3V-24V or 48V-240V AC\/DC\u003c\/li\u003e\n\u003cli\u003eEight layer stackable to 64 inputs\u003c\/li\u003e\n\u003cli\u003eLED Indicators on each input\u003c\/li\u003e\n\u003cli\u003ePluggable Connectors 26-16 AWG wires\u003c\/li\u003e\n\u003cli\u003eSeparate low\/high voltage connectors for each input\u003c\/li\u003e\n\u003cli\u003eSoftware self-test\u003c\/li\u003e\n\u003cli\u003eRS485 Transceiver\u003c\/li\u003e\n\u003cli\u003eCommand Line Driver\u003c\/li\u003e\n\u003cli\u003ePython Library\u003c\/li\u003e\n\u003cli\u003eNode-Red nodes\u003c\/li\u003e\n\u003cli\u003e\nOpenPLC\u003cspan\u003e \u003c\/span\u003emodule\u003c\/li\u003e\n\u003cli\u003e3D Printing Enclosure\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eCompatability\u003c\/h3\u003e\n\u003cp\u003eThe card is compatible with all Raspberry Pi versions from Zero to 4. 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 card needs 5V to operate and can be powered from Raspberry Pi or from its own 2-pin pluggable connector. The card draws 10mA. If power is applied to the\u003cspan\u003e \u003c\/span\u003e\u003cspan\u003e2-pin pluggable\u003c\/span\u003e\u003cspan\u003e \u003c\/span\u003econnector, no other power supply is needed for the Raspberry Pi.\u003c\/p\u003e\n\u003ch3\u003eStacking Multiple Cards\u003c\/h3\u003e\n\u003cp\u003eUp to eight cards can be stacked on your Raspberry Pi. Each card is identified by jumpers you install to indicate the level in the stack. Cards can be installed in any order. A three-position jumper selects the stack level.\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eFor your convenience, two jumpers are provided with each card. \u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0176\/3274\/files\/stack_level1_2439346f-09fa-44d5-b390-c95458e42243.jpg?v=1628002069\u0026amp;width=700\" alt=\"eight inputs card jumpers\"\u003e\u003c\/p\u003e\n\u003ch3\u003eReverse Power Supply Protection\u003c\/h3\u003e\n\u003cp\u003e\u003cspan\u003eThe board is protected against accidental reverse power supply with a 5.8A, 39 mOhm MOSFET which breaks the ground line if reverse power is applied. \u003c\/span\u003e\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 that monitors this pin, and if pressed for more than the desired time, issues the shut-down command.\u003c\/p\u003e\n\u003ch3\u003eDIN-Rail Mounting\u003c\/h3\u003e\n\u003cp\u003eThe card can be installed parallel on a DIN-Rail using the\u003cspan\u003e \u003c\/span\u003eDIN-Rail Kit Type 1, or perpendicular using the\u003cspan\u003e \u003c\/span\u003eDIN-Rail Kit Type 2.\u003c\/p\u003e\n\u003ch2\u003eSoftware\u003c\/h2\u003e\n\u003ch3\u003eSoftware Interfaces\u003c\/h3\u003e\n\u003cp\u003eYou can write your own application using the\u003cspan\u003e \u003c\/span\u003eCommand Line\u003cspan\u003e \u003c\/span\u003eor\u003cspan\u003e \u003c\/span\u003ePython Library\u003cspan\u003e \u003c\/span\u003eprovided. No programming is required if you use the\u003cspan\u003e \u003c\/span\u003eNode-Red nodes\u003cspan\u003e \u003c\/span\u003ewe supply. You can drag-and-drop the functional blocks to design your application. Examples are provided at GitHub.\u003c\/p\u003e\n\u003ch3\u003eRS485 Port\u003c\/h3\u003e\n\u003cp\u003eA standard RS485 transceiver permits the Raspberry Pi to communicate using any protocol including MODBUS, PROFIBUS, camera PTZ control, etc.\u003c\/p\u003e\n\u003cp\u003eThe transceiver is connected to the serial port of the Raspberry Pi from the GPIO connector, pins 8 (GPIO14, TxD0) and 10 (GPIO15, RxD0). The Rx line is routed through a 2 pin jumper. The jumper needs to be installed in order to use the RS485 port. If the jumper is not installed, both pins can be used as GPIO's. An on-board 120 Ohms terminator can be applied through the jumper located next to the port.\u003c\/p\u003e\n\u003ch3\u003eDrivers \u0026amp; Libraries\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eCommand Line Driver\u003c\/li\u003e\n\u003cli\u003ePython Library\u003c\/li\u003e\n\u003cli\u003eNode-Red nodes\u003c\/li\u003e\n\u003cli\u003e\nOpenPLC\u003cspan\u003e \u003c\/span\u003emodule\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cbr\u003e\u003c\/h3\u003e\n\u003ch3\u003eElectrical Specifications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003ePower Supply: 5V\/8A pluggable connector with reverse polarity protection\u003c\/li\u003e\n\u003cli\u003eOnboard resettable fuse: 3A\u003c\/li\u003e\n\u003cli\u003eOpto-isolated Digital Inputs:\u003c\/li\u003e\n\u003cul\u003e\n\u003cli\u003eInput Forward Current: Typical 5 mA, maximum 50 mA\u003c\/li\u003e\n\u003cli\u003eLow Voltage Input Series Resistor: 2.2K\u003c\/li\u003e\n\u003cli\u003eHigh Voltage Input Series Resistor: 120K\u003c\/li\u003e\n\u003cli\u003eIsolation Resistance: Minimum 10\u003csup\u003e12\u003c\/sup\u003e\u003cspan\u003e \u003c\/span\u003eΩ\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eMechanical Specifications\u003c\/h3\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0176\/3274\/files\/8-INP_mech_10fa2ec9-f273-40f9-87b5-eb13c4ff5775.jpg?v=1628003175\u0026amp;width=700\" alt=\"8 inputs mechanical layout\"\u003e\u003c\/p\u003e\n\u003ch3\u003ePackage Contents\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e1x 8 Inputs card\u003c\/li\u003e\n\u003cli\u003e2x Jumpers\u003c\/li\u003e\n\u003cli\u003e10x Mating plugs (8x 3-pin, 2x 2-pin)\u003c\/li\u003e\n\u003cli\u003eBrass Mounting Hardware\n\u003cul\u003e\n\u003cli\u003e4x M2.5x18mm male-female standoffs\u003c\/li\u003e\n\u003cli\u003e4x M2.5x5mm screws\u003c\/li\u003e\n\u003cli\u003e4x 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\u003eAs of 04\/09\/2025 we are now stocking V4.0\u003c\/li\u003e\n\u003cli\u003eAs of 30\/01\/2024 we are now stocking V2.0\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Sequent","offers":[{"title":"Default Title","offer_id":46982671138988,"sku":"yvn1787258127473","price":27.72,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/3858\/0140\/files\/eight-hv-digital-inputs-8-layer-stackable-hat-for-raspberry-pi-v40-discontinued_1.jpg?v=1787258136","url":"https:\/\/findnuvorio.com\/products\/eight-hv-digital-inputs-8-layer-stackable-hat-for-raspberry-pi-v40-discontinued","provider":"Findnuvorio","version":"1.0","type":"link"}