{"product_id":"24vdc-quad-4-relay-module","title":"24VDC Quad (4 Channel) Relay Module","description":"\u003cp\u003eThe 4 Channel 24V Relay Module is a control interface device designed for industrial automation and PLC applications. Here's a comprehensive breakdown:\u003c\/p\u003e\n\u003cp\u003eKey Specifications:\u003cbr\u003e- Operating voltage: 24V DC\u003cbr\u003e- Contact ratings: AC 250V\/10A, DC 30V\/10A (max load)\u003cbr\u003e- Trigger current: 5mA\u003cbr\u003e- Dimensions: 73mm × 50mm × 18.5mm (L × W × H)\u003cbr\u003e- Mounting hole pattern: 67mm × 44.5mm pitch, 3.1mm diameter holes\u003c\/p\u003e\n\u003cp\u003eTechnical Features:\u003cbr\u003e1. Isolation and Safety\u003cbr\u003e- SMD optocoupler isolation for electrical safety\u003cbr\u003e- Fault-tolerant design prevents relay activation if control line breaks\u003cbr\u003e- OPTO-isolation provides protection between control and load circuits\u003c\/p\u003e\n\u003cp\u003e2. Interface Configuration\u003cbr\u003e- 4 independent relay channels\u003cbr\u003e- Each channel configurable for high or low level triggering via jumper\u003cbr\u003e- Terminals for all connections (control inputs and relay contacts)\u003c\/p\u003e\n\u003cp\u003e3. Contact Arrangements (per channel)\u003cbr\u003e- NO (Normally Open) contacts\u003cbr\u003e- NC (Normally Closed) contacts\u003cbr\u003e- COM (Common) terminals\u003cbr\u003e- All contacts rated for 10A switching current\u003c\/p\u003e\n\u003cp\u003e4. Status Indication\u003cbr\u003e- Green power indicator LED\u003cbr\u003e- 4 red LEDs for individual relay status\u003cbr\u003e- Visual confirmation of operation\u003c\/p\u003e\n\u003cp\u003e5. Control Interface\u003cbr\u003e- IN1 through IN4 control inputs\u003cbr\u003e- Selectable trigger logic (high\/low) via S1-S4 jumpers\u003cbr\u003e- COM terminal for trigger reference\u003c\/p\u003e\n\u003cp\u003eInstallation Features:\u003cbr\u003e- Panel mount design\u003cbr\u003e- 4 mounting holes for secure installation\u003cbr\u003e- Terminal block connections for all wiring\u003cbr\u003e- Direct wire connection capability without special connectors\u003c\/p\u003e\n\u003cp\u003eApplications:\u003cbr\u003e- PLC integration\u003cbr\u003e- Industrial automation\u003cbr\u003e- Equipment control\u003cbr\u003e- Process automation\u003cbr\u003e- Power switching applications\u003c\/p\u003e\n\u003cp\u003eThis module offers professional-grade features like optocoupler isolation and configurable triggering while maintaining ease of use through straightforward terminal connections and clear status indicators.\u003c\/p\u003e\n\u003cp class=\"whitespace-pre-wrap break-words\"\u003eBasic Relay Operation: A relay is essentially an electrically controlled switch. When voltage is applied to the control input (IN1-IN4), it energizes an internal coil through the optocoupler, which mechanically switches the contacts. The optocoupler provides electrical isolation between your control circuit (CNC controller) and the switched load circuit.\u003c\/p\u003e\n\u003cp class=\"whitespace-pre-wrap break-words\"\u003eContact States:\u003c\/p\u003e\n\u003cul class=\"-mt-1 [li\u0026gt;\u0026amp;]:mt-2 list-disc space-y-2 pl-8\"\u003e\n\u003cli class=\"whitespace-normal break-words\"\u003eNO (Normally Open): Circuit is open until relay is energized\u003c\/li\u003e\n\u003cli class=\"whitespace-normal break-words\"\u003eNC (Normally Closed): Circuit is closed until relay is energized\u003c\/li\u003e\n\u003cli class=\"whitespace-normal break-words\"\u003eCOM (Common): The common terminal that switches between NO and NC\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp class=\"whitespace-pre-wrap break-words\"\u003eConnection to CNC Controller:\u003c\/p\u003e\n\u003col class=\"-mt-1 [li\u0026gt;\u0026amp;]:mt-2 list-decimal space-y-2 pl-8\"\u003e\n\u003cli class=\"whitespace-normal break-words\"\u003ePower Supply Connection:\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003cul class=\"-mt-1 [li\u0026gt;\u0026amp;]:mt-2 list-disc space-y-2 pl-8\"\u003e\n\u003cli class=\"whitespace-normal break-words\"\u003eConnect 24V DC power supply to the module:\n\u003cul class=\"-mt-1 [li\u0026gt;\u0026amp;]:mt-2 list-disc space-y-2 pl-8\"\u003e\n\u003cli class=\"whitespace-normal break-words\"\u003eDC+ to positive terminal\u003c\/li\u003e\n\u003cli class=\"whitespace-normal break-words\"\u003eDC- to negative\/ground terminal\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003col start=\"2\" class=\"-mt-1 [li\u0026gt;\u0026amp;]:mt-2 list-decimal space-y-2 pl-8\"\u003e\n\u003cli class=\"whitespace-normal break-words\"\u003eControl Signal Connection:\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003cul class=\"-mt-1 [li\u0026gt;\u0026amp;]:mt-2 list-disc space-y-2 pl-8\"\u003e\n\u003cli class=\"whitespace-normal break-words\"\u003eFrom CNC controller outputs to relay module:\n\u003cul class=\"-mt-1 [li\u0026gt;\u0026amp;]:mt-2 list-disc space-y-2 pl-8\"\u003e\n\u003cli class=\"whitespace-normal break-words\"\u003eConnect controller's ground\/COM to relay module's DC-\u003c\/li\u003e\n\u003cli class=\"whitespace-normal break-words\"\u003eConnect controller's output signals to IN1-IN4\u003c\/li\u003e\n\u003cli class=\"whitespace-normal break-words\"\u003eSet appropriate trigger jumpers (S1-S4) based on controller output type:\n\u003cul class=\"-mt-1 [li\u0026gt;\u0026amp;]:mt-2 list-disc space-y-2 pl-8\"\u003e\n\u003cli class=\"whitespace-normal break-words\"\u003eFor active-high outputs: Set jumper to \"H\"\u003c\/li\u003e\n\u003cli class=\"whitespace-normal break-words\"\u003eFor active-low outputs: Set jumper to \"L\"\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003col start=\"3\" class=\"-mt-1 [li\u0026gt;\u0026amp;]:mt-2 list-decimal space-y-2 pl-8\"\u003e\n\u003cli class=\"whitespace-normal break-words\"\u003eLoad Connection (for each channel):\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003cul class=\"-mt-1 [li\u0026gt;\u0026amp;]:mt-2 list-disc space-y-2 pl-8\"\u003e\n\u003cli class=\"whitespace-normal break-words\"\u003eFor devices you want to turn ON when activated:\n\u003cul class=\"-mt-1 [li\u0026gt;\u0026amp;]:mt-2 list-disc space-y-2 pl-8\"\u003e\n\u003cli class=\"whitespace-normal break-words\"\u003eConnect one wire to COM terminal\u003c\/li\u003e\n\u003cli class=\"whitespace-normal break-words\"\u003eConnect other wire to NO terminal\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli class=\"whitespace-normal break-words\"\u003eFor devices you want to turn OFF when activated:\n\u003cul class=\"-mt-1 [li\u0026gt;\u0026amp;]:mt-2 list-disc space-y-2 pl-8\"\u003e\n\u003cli class=\"whitespace-normal break-words\"\u003eConnect one wire to COM terminal\u003c\/li\u003e\n\u003cli class=\"whitespace-normal break-words\"\u003eConnect other wire to NC terminal\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp class=\"whitespace-pre-wrap break-words\"\u003eCommon CNC Applications:\u003c\/p\u003e\n\u003col class=\"-mt-1 [li\u0026gt;\u0026amp;]:mt-2 list-decimal space-y-2 pl-8\"\u003e\n\u003cli class=\"whitespace-normal break-words\"\u003eSpindle control\u003c\/li\u003e\n\u003cli class=\"whitespace-normal break-words\"\u003eCoolant pump control\u003c\/li\u003e\n\u003cli class=\"whitespace-normal break-words\"\u003eVacuum\/dust collection activation\u003c\/li\u003e\n\u003cli class=\"whitespace-normal break-words\"\u003eTool changer operation\u003c\/li\u003e\n\u003cli class=\"whitespace-normal break-words\"\u003eEmergency stop integration\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003cp class=\"whitespace-pre-wrap break-words\"\u003eSafety Considerations:\u003c\/p\u003e\n\u003col class=\"-mt-1 [li\u0026gt;\u0026amp;]:mt-2 list-decimal space-y-2 pl-8\"\u003e\n\u003cli class=\"whitespace-normal break-words\"\u003eAlways verify voltage compatibility between CNC controller and relay module\u003c\/li\u003e\n\u003cli class=\"whitespace-normal break-words\"\u003eEnsure proper grounding\u003c\/li\u003e\n\u003cli class=\"whitespace-normal break-words\"\u003eUse appropriate wire gauge for load current\u003c\/li\u003e\n\u003cli class=\"whitespace-normal break-words\"\u003eKeep high-voltage connections well-insulated\u003c\/li\u003e\n\u003cli class=\"whitespace-normal break-words\"\u003eConsider adding flyback diodes for inductive loads\u003c\/li\u003e\n\u003cli class=\"whitespace-normal break-words\"\u003eDouble-check all connections before powering up\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003cp class=\"whitespace-pre-wrap break-words\"\u003eExample Connection for Spindle Control:\u003c\/p\u003e\n\u003cdiv class=\"relative flex flex-col rounded-lg\"\u003e\n\u003cdiv class=\"pointer-events-none sticky my-0.5 ml-0.5 flex items-center justify-end px-1.5 py-1 mix-blend-luminosity top-0\"\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cdiv class=\"code-block__code !my-0 !rounded-lg !text-sm !leading-relaxed\"\u003e\u003ccode\u003e\u003cspan\u003eCNC Controller Output -\u0026gt; IN1 \u003c\/span\u003e\u003cspan\u003eSpindle Power (+) -\u0026gt; External Power Source (+)\n\u003c\/span\u003e\u003cspan\u003eExternal Power Source (-) -\u0026gt; COM1\n\u003c\/span\u003e\u003cspan\u003eSpindle Power (-) -\u0026gt; NO1\u003c\/span\u003e\u003c\/code\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cp class=\"whitespace-pre-wrap break-words\"\u003eThis creates a switched circuit where the spindle only receives power when the CNC controller activates the relay.\u003c\/p\u003e\n\u003cp class=\"whitespace-pre-wrap break-words\"\u003eCurrent Limitations:\u003c\/p\u003e\n\u003cul class=\"-mt-1 [li\u0026gt;\u0026amp;]:mt-2 list-disc space-y-2 pl-8\"\u003e\n\u003cli class=\"whitespace-normal break-words\"\u003eStay within 10A per channel\u003c\/li\u003e\n\u003cli class=\"whitespace-normal break-words\"\u003eFor larger loads, use these relays to control larger contactors\u003c\/li\u003e\n\u003cli class=\"whitespace-normal break-words\"\u003eConsider duty cycle for repetitive operations\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp class=\"whitespace-pre-wrap break-words\"\u003eTesting Setup:\u003c\/p\u003e\n\u003col class=\"-mt-1 [li\u0026gt;\u0026amp;]:mt-2 list-decimal space-y-2 pl-8\"\u003e\n\u003cli class=\"whitespace-normal break-words\"\u003eBefore connecting to actual loads:\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003cul class=\"-mt-1 [li\u0026gt;\u0026amp;]:mt-2 list-disc space-y-2 pl-8\"\u003e\n\u003cli class=\"whitespace-normal break-words\"\u003ePower up the relay module\u003c\/li\u003e\n\u003cli class=\"whitespace-normal break-words\"\u003eTrigger each input manually\u003c\/li\u003e\n\u003cli class=\"whitespace-normal break-words\"\u003eVerify LED indicators work\u003c\/li\u003e\n\u003cli class=\"whitespace-normal break-words\"\u003eListen for relay clicking\u003c\/li\u003e\n\u003cli class=\"whitespace-normal break-words\"\u003eUse multimeter to verify contact switching\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003col start=\"2\" class=\"-mt-1 [li\u0026gt;\u0026amp;]:mt-2 list-decimal space-y-2 pl-8\"\u003e\n\u003cli class=\"whitespace-normal break-words\"\u003eAfter connecting loads:\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003cul class=\"-mt-1 [li\u0026gt;\u0026amp;]:mt-2 list-disc space-y-2 pl-8\"\u003e\n\u003cli class=\"whitespace-normal break-words\"\u003eTest each function at low speed\/power first\u003c\/li\u003e\n\u003cli class=\"whitespace-normal break-words\"\u003eVerify emergency stop functionality\u003c\/li\u003e\n\u003cli class=\"whitespace-normal break-words\"\u003eCheck for any unusual heating\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"BuildYourCNC","offers":[{"title":"Default Title","offer_id":46073819168942,"sku":"6631-LPHDH323","price":13.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0664\/7516\/3822\/files\/Screenshot2024-12-29175117.png?v=1735512694","url":"https:\/\/buildyuurcnc.com\/products\/24vdc-quad-4-relay-module","provider":"BuildYourCNC","version":"1.0","type":"link"}