{"product_id":"four-relays-four-inputs-8-layer-stackable-card-for-raspberry-pi-v50-discontinued","title":"Four Relays Four Inputs 8-Layer Stackable Card for Raspberry Pi (v5.0) [Discontinued]","description":"\u003cp\u003e\u003cstrong\u003eFour heavy-duty relays plus four universal inputs for your Raspberry Pi \u003cspan\u003e- \u003c\/span\u003e\u003c\/strong\u003eand now with a custom Home Assistant integration!\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eDrive\u003c\/strong\u003e \u003cstrong\u003e8A\/240VAC\u003c\/strong\u003e loads and \u003cstrong\u003eread 3V to 240V\u003c\/strong\u003e, AC or DC, Opto-isolated inputs for all your Home or Industrial Automation Projects.\u003c\/p\u003e\n\u003cp\u003eA perfect add-on to your project when you have to control a large number of heavy-duty AC loads and\/or you have to read wide-range inputs. Stackable to 8 layers, the card can add up to 32 relays to each Raspberry Pi in a very compact form factor. In addition, you can read up to 32 opto-isolated inputs.\u003c\/p\u003e\n\u003cp\u003ePluggable connectors make this card easy to use when multiple cards are stacked up. All relays have Normal Open and Normal Close contacts and \u003cstrong\u003ecan switch up to 8A\/240VAC\u003c\/strong\u003e.\u003c\/p\u003e\n\u003cp\u003eThe optically isolated universal inputs \u003cstrong\u003ecan read AC or DC signals from 3V to 240V\u003c\/strong\u003e. The input connectors have a low voltage port that can read signals between 3V and 24V, and a high voltage port that can read signals between 48V and 240V.\u003c\/p\u003e\n\u003cp\u003eFor any technical questions about this product please email support@sequentmicrosystems.com\u003c\/p\u003e\n\u003ch2\u003eNew!\u003c\/h2\u003e\n\u003cp\u003eThe latest versions of the card replaced the I\/O expander with a local processor. This enhancement allowed us to add several new features:\u003cbr\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eIndependent RS485 (no Raspberry Pi needed)\u003c\/li\u003e\n\u003cli\u003eMODBUS protocol allows the card to be controlled from any PLC\u003c\/li\u003e\n\u003cli\u003eTransition counters to 4kHz on all inputs\u003c\/li\u003e\n\u003cli\u003eInput counters with cumulative or PPS (pulse per second) reading up to 4kHz\u003c\/li\u003e\n\u003cli\u003e2 x Quadrature encoder inputs reading up to 4000 PPS\u003c\/li\u003e\n\u003cli\u003ePWM inputs on each channel, reading both the fill factor and the frequency\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eFeatures\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eFour RELAYS with Status LEDs\u003cspan\u003e and NO\/NC contacts\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003eFour universal opto-isolated inputs with status LEDs\u003c\/li\u003e\n\u003cli\u003eEight layers stackable to 32 relays and 32 inputs\u003c\/li\u003e\n\u003cli\u003eRS485\/MODBUS transceiver\u003c\/li\u003e\n\u003cli\u003eMODBUS protocol allows the card to be controlled from any PLC\u003c\/li\u003e\n\u003cli\u003eIndependent RS485 (no Raspberry Pi needed)\u003c\/li\u003e\n\u003cli\u003eInput counters with cumulative or PPS (pulse per second) reading up to 4kHz\u003c\/li\u003e\n\u003cli\u003ePWM inputs on each channel, reading both the fill factor and the frequency\u003c\/li\u003e\n\u003cli\u003eRaspberry Pi reset push button\u003c\/li\u003e\n\u003cli\u003ePluggable Connectors 30-16 AWG wires\u003c\/li\u003e\n\u003cli\u003eSwitch loads of up to 8A and 240VAC\/24VDC\u003c\/li\u003e\n\u003cli\u003eRead 3V to 240V AC\/DC inputs\u003c\/li\u003e\n\u003cli\u003eSoftware self-test\u003c\/li\u003e\n\u003cli\u003eCommand Line\u003c\/li\u003e\n\u003cli\u003ePython Drivers\u003c\/li\u003e\n\u003cli\u003e\nNode-Red node\u003cspan\u003e \u003c\/span\u003eand\u003cspan\u003e \u003c\/span\u003eexamples\n\u003c\/li\u003e\n\u003cli\u003eOpenPLC module\u003c\/li\u003e\n\u003cli\u003eArduino Library\u003c\/li\u003e\n\u003cli\u003e\nHome Assistant Integration\u003cbr\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eFeature Details\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003ePower Requirements\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe card needs 5V to operate and can be powered from Raspberry Pi or from its 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 2-pin pluggable connector, no other power supply is needed for the Raspberry Pi.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eStacking Multiple Cards\u003c\/strong\u003e\u003c\/p\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. For your convenience, two jumpers are provided with each card.\u003c\/p\u003e\n\u003cp\u003e\u003cimg alt=\"4 relays 4 inputs jumpers\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0176\/3274\/files\/stack_level1.jpg?v=1620928902\u0026amp;width=700\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eReverse Power Supply Protection\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe board is protected from an 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\u003cp\u003e\u003cstrong\u003eReset Pushbutton\u003c\/strong\u003e\u003c\/p\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\u003cp\u003e\u003cstrong\u003eCompatibility\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe card is compatible with all 40-pin Raspberry Pi versions from the Pi Zero to the Raspberry Pi 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\u003cp\u003e\u003cstrong\u003eDIN Rail Mounting\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe card can be installed parallel on a DIN-Rail using the DIN-Rail Kit Type 1, or perpendicular using the DIN-Rail Kit Type 2.\u003c\/p\u003e\n\u003ch2\u003eSoftware\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eSoftware Interfaces\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eYou can write your own application using the Command Line or Python Libraries provided. A usage example for the python library can be found in the tests.py file in the repository. 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 also provided.\u003c\/p\u003e\n\u003cp\u003eAll downloads can be found here.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eRelay Self Test\u003c\/strong\u003e\u003c\/p\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 second intervals. The clicking noise of the relays and the lighting of the LEDs will assure that all relays are functioning.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eRS485\/MODBUS Port\u003c\/strong\u003e\u003c\/p\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 can be driven either from the Raspberry Pi serial port or directly from the local processor.\u003c\/p\u003e\n\u003ch3\u003e\u003cspan style=\"font-size: 0.875rem;\"\u003eExtended functions of the input ports\u003c\/span\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eTransition counters to 4kHz on all inputs\u003c\/li\u003e\n\u003cli\u003eInput counters with cumulative or PPS (pulse per second) reading up to 4kHz\u003c\/li\u003e\n\u003cli\u003e2 x Quadrature encoder inputs reading up to 4000 PPS\u003c\/li\u003e\n\u003cli\u003ePWM inputs on each channel, reading both the fill factor and the frequency\u003c\/li\u003e\n\u003cli\u003e1% resolution on PWM inputs up to 100Hz, 5% resolution up to 500Hz.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003e\u003cstrong\u003eQuick Start\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003ePlug your 4-RELAYS\/4-INPUTS 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 card software from github.com:\u003cbr\u003e~$ git clone https:\/\/github.com\/SequentMicrosystems\/4relind-rpi.git\u003cbr\u003e~$ cd \/home\/pi\/4relind-rpi\u003cbr\u003e~\/4relind-rpi$ sudo make install\u003cbr\u003e~\/4relind-rpi$ 4relind\u003c\/li\u003e\n\u003cli\u003eThe program will respond with a list of available commands.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003ePackage Contents\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e1x 4-relays Add-on Card For Raspberry Pi\u003c\/li\u003e\n\u003cli\u003e1x Mounting hardware pack\u003c\/li\u003e\n\u003cli\u003e1x Pluggable connector pack\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eRaspberry Pi not included\u003c\/strong\u003e\u003c\/p\u003e\n\u003ch2\u003eElectrical Specification\u003c\/h2\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: 1.2K\u003c\/li\u003e\n\u003cli\u003eHigh Voltage Input Series Resistor: 10K\u003c\/li\u003e\n\u003cli\u003eIsolation Resistance: Minimum 1012 Ω\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cli\u003eRelays: NO\/NC contacts, 8A\/240 VAC-24 VDC\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eRevision History\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eAs of 16\/01\/2025\u003c\/strong\u003e we are now stocking V5.0\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Sequent","offers":[{"title":"Default Title","offer_id":43493253939277,"sku":"gzb1787258179194","price":32.34,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0644\/1182\/8301\/files\/four-relays-four-inputs-8-layer-stackable-card-for-raspberry-pi-v50-discontinued_1.jpg?v=1787258184","url":"https:\/\/www.grandorchard.shop\/products\/four-relays-four-inputs-8-layer-stackable-card-for-raspberry-pi-v50-discontinued","provider":"My Store","version":"1.0","type":"link"}