{"title":"Relays","description":"\u003cp\u003eElectrical switching components for power and signal control in CNC systems.\u003c\/p\u003e","products":[{"product_id":"electronicsandmotors-breakout-relays-relay-board-250v-12a-5v","title":"Relay Board to Switch on Electrical Devices","description":"\u003cp\u003eThe relay board will turn on standard electrical devices up to 12 amps and 250 volts using a standard 5v signal.    A relay board acts like an automatic switch to turn on and off electrical devices and appliances. The relay board has the capability of turning on and off devices that typically plug in to the wall outlet, but many more types devices can be operated from this relay switch.    If a 5v signal is applied to the relay board, then the relay makes a connection between the P and O terminals and breaks the connection between the P and S terminals. Therefore, you can have things turned on in scenarios where the 5v is applied or if the 5v is not applied, depending on how it is wired.\u003c\/p\u003e","brand":"BuildYourCNC","offers":[{"title":"Single Relay Board","offer_id":45875880067246,"sku":"6197","price":9.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0664\/7516\/3822\/files\/IMG_6496-800.jpg?v=1730086097"},{"product_id":"electronicsandmotors-breakout-relays-relay-board-dual-250v-10a-24v","title":"24VDC Dual Relay Module","description":"\u003cp\u003eControl high powered devices with this dual 24V relay. Requires a 24VDC input to turn the relay on and off. The relay features: - NC (Normally Closed) and NO (Normally Open) operation - 10 amps at 250 volts or 15 amps at 125 volts AC - LED indication of which relay is engaged - LED indication of power from a 24V source - Active high or low operation for each input - Optoisolated communication between the input and the relay coil so there will be no harmful back current from the relay coil - Screw terminals for easy wiring This dual relay is great for controlling CNC devices like spindles. Use with dual relay with our popular \u003ca href=\"https:\/\/www.buildyuurcnc.com\/item\/electronicsAndMotors-electronic-component-breakout-Mach3-USB-Board\"\u003eMach3 USB Controller\u003c\/a\u003e Dimensions of the board is 2 in x 1.8 in. Mounting dimensions are 1.82 in x1.59 in\u003c\/p\u003e\n\u003cdiv class=\"video-container\"\u003e\u003ciframe style=\"width: 100%; height: 100%;\" width=\"246\" height=\"138\" src=\"https:\/\/www.youtube.com\/embed\/\/Qi4M3DAtTXg\" frameborder=\"0\" allowfullscreen=\"\"\u003e\u003c\/iframe\u003e\u003c\/div\u003e\n\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e","brand":"BuildYourCNC","offers":[{"title":"24VDC Dual Relay","offer_id":45875887407278,"sku":"6631-LPHDH323","price":10.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0664\/7516\/3822\/files\/IMG_7295-800.jpg?v=1730087152"},{"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"},{"product_id":"cnc-spindle-speed-control-bundle","title":"CNC Spindle Speed Control Bundle","description":"\u003cdiv style=\"font-family: Arial, sans-serif; line-height: 1.6; color: #222;\"\u003e\n\n  \u003ch2 style=\"font-size: 24px; margin-bottom: 10px;\"\u003eCNC Spindle Speed Control Bundle\u003c\/h2\u003e\n\n  \u003cp style=\"font-size: 16px; margin-bottom: 18px;\"\u003e\n    The \u003cstrong\u003eCNC Spindle Speed Control Bundle\u003c\/strong\u003e is built for CNC users who want to control spindle speed and switch an accessory circuit from their CNC control system. This bundle pairs the \u003cstrong\u003eC41S-PWM Spindle Speed Control Board\u003c\/strong\u003e with the \u003cstrong\u003eC37 Single Relay Board\u003c\/strong\u003e, giving you a practical setup for VFD spindle control, spindle enable wiring, coolant control, contactor triggering, or other CNC accessory switching.\n  \u003c\/p\u003e\n\n  \u003cp style=\"font-size: 16px; margin-bottom: 18px;\"\u003e\n    This is a cleaner option than buying parts separately and trying to figure out later what else is needed. The C41S-PWM handles the spindle speed signal, while the C37 gives you a dedicated relay output for switching one compatible AC or DC device.\n  \u003c\/p\u003e\n\n  \u003cdiv style=\"background: #f6f6f6; border-left: 4px solid #333; padding: 15px 18px; margin: 22px 0;\"\u003e\n    \u003cstrong\u003eBest for:\u003c\/strong\u003e CNC routers, CNC mills, VFD spindle setups, spindle enable circuits, coolant pump control, contactor triggering, and CNC control box upgrades.\n  \u003c\/div\u003e\n\n  \u003ch3 style=\"font-size: 20px; margin-top: 28px;\"\u003eWhat’s Included\u003c\/h3\u003e\n\n  \u003cul style=\"padding-left: 22px; margin-bottom: 22px;\"\u003e\n    \u003cli\u003e\n      \u003cstrong\u003eC41S-PWM Spindle Speed Control Board\u003c\/strong\u003e\u003cbr\u003e\n      Converts a PWM signal into a \u003cstrong\u003e0–10V analog output\u003c\/strong\u003e for compatible VFD and spindle speed control.\n      \u003cbr\u003e\n      \u003ca href=\"\/products\/c41s-pwm-spindle-speed-control-board-with-0-10v-analog-output\" style=\"color: #0056b3; text-decoration: underline;\"\u003eView full C41S-PWM specs\u003c\/a\u003e\n    \u003c\/li\u003e\n\n    \u003cli style=\"margin-top: 14px;\"\u003e\n      \u003cstrong\u003eC37 Single Relay Board\u003c\/strong\u003e\u003cbr\u003e\n      Provides one relay output for switching a spindle enable circuit, coolant pump, contactor, valve, or other compatible CNC accessory.\n      \u003cbr\u003e\n      \u003ca href=\"\/products\/c37-single-relay-board-for-cnc-accessory-control\" style=\"color: #0056b3; text-decoration: underline;\"\u003eView full C37 relay board specs\u003c\/a\u003e\n    \u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003ch3 style=\"font-size: 20px; margin-top: 28px;\"\u003eWhy Buy This Bundle?\u003c\/h3\u003e\n\n  \u003cul style=\"padding-left: 22px; margin-bottom: 22px;\"\u003e\n    \u003cli\u003e\n      \u003cstrong\u003eControl spindle speed from your CNC system:\u003c\/strong\u003e\n      The C41S-PWM outputs the 0–10V analog signal used by many compatible VFDs for external spindle speed control.\n    \u003c\/li\u003e\n    \u003cli\u003e\n      \u003cstrong\u003eAdd a dedicated relay output:\u003c\/strong\u003e\n      The C37 gives you one relay-controlled output for spindle enable, coolant, contactor triggering, solenoids, or another compatible accessory.\n    \u003c\/li\u003e\n    \u003cli\u003e\n      \u003cstrong\u003eCleaner control box layout:\u003c\/strong\u003e\n      These boards help organize spindle and accessory control inside your CNC cabinet instead of leaving the wiring scattered across separate components.\n    \u003c\/li\u003e\n    \u003cli\u003e\n      \u003cstrong\u003eBetter than guessing parts individually:\u003c\/strong\u003e\n      Many CNC builders realize they need both speed control and relay switching. This bundle gives you both together.\n    \u003c\/li\u003e\n    \u003cli\u003e\n      \u003cstrong\u003eUseful for VFD-based spindle setups:\u003c\/strong\u003e\n      If your VFD supports external 0–10V analog speed control, this bundle gives you a strong starting point for CNC-controlled spindle operation.\n    \u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003ch3 style=\"font-size: 20px; margin-top: 28px;\"\u003eCommon Uses\u003c\/h3\u003e\n\n  \u003cul style=\"padding-left: 22px; margin-bottom: 22px;\"\u003e\n    \u003cli\u003eVFD spindle speed control\u003c\/li\u003e\n    \u003cli\u003eCNC-controlled spindle on\/off or enable wiring\u003c\/li\u003e\n    \u003cli\u003eCoolant pump switching\u003c\/li\u003e\n    \u003cli\u003eContactor triggering for larger spindle systems\u003c\/li\u003e\n    \u003cli\u003eSolenoid or electro-valve control\u003c\/li\u003e\n    \u003cli\u003eCNC router or CNC mill control box upgrades\u003c\/li\u003e\n    \u003cli\u003eReplacing manual spindle speed adjustment with CNC-controlled speed output\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003ch3 style=\"font-size: 20px; margin-top: 28px;\"\u003eSimple Explanation\u003c\/h3\u003e\n\n  \u003cp style=\"font-size: 16px; margin-bottom: 18px;\"\u003e\n    The \u003cstrong\u003eC41S-PWM\u003c\/strong\u003e helps your CNC controller send a speed command to a compatible VFD or spindle drive. The \u003cstrong\u003eC37\u003c\/strong\u003e acts like a CNC-controlled switch for one external device. Together, they help you build a cleaner spindle-control section inside your CNC control box.\n  \u003c\/p\u003e\n\n  \u003cp style=\"font-size: 16px; margin-bottom: 18px;\"\u003e\n    This bundle is best for customers who want spindle speed control plus one relay-controlled output without having to piece the parts together separately.\n  \u003c\/p\u003e\n\n  \u003ch3 style=\"font-size: 20px; margin-top: 28px;\"\u003eImportant Compatibility Notes\u003c\/h3\u003e\n\n  \u003cul style=\"padding-left: 22px; margin-bottom: 22px;\"\u003e\n    \u003cli\u003eThe C41S-PWM is \u003cstrong\u003enot a VFD\u003c\/strong\u003e and is \u003cstrong\u003enot a spindle drive\u003c\/strong\u003e.\u003c\/li\u003e\n    \u003cli\u003eYour VFD or motor controller must support external \u003cstrong\u003e0–10V analog speed control\u003c\/strong\u003e.\u003c\/li\u003e\n    \u003cli\u003eYour CNC controller must provide the required PWM\/control signal.\u003c\/li\u003e\n    \u003cli\u003eThe C37 relay board must be matched to the voltage and current requirements of the device you plan to switch.\u003c\/li\u003e\n    \u003cli\u003eFor larger motors, pumps, or high-current devices, use the relay to trigger a properly rated contactor instead of switching the load directly.\u003c\/li\u003e\n    \u003cli\u003eAlways verify your controller, VFD, relay load, wiring, and software settings before connecting power.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003cdiv style=\"background: #fff8e5; border: 1px solid #e0c878; padding: 15px 18px; margin-top: 24px;\"\u003e\n    \u003cstrong\u003eNeed help confirming compatibility?\u003c\/strong\u003e\n    \u003cp style=\"margin: 8px 0 0 0;\"\u003e\n      If you are not sure whether this bundle is right for your CNC spindle, VFD, or control box, contact us before ordering. We can help you check your controller output, VFD input requirements, and relay-control needs.\n    \u003c\/p\u003e\n  \u003c\/div\u003e\n\n\u003c\/div\u003e","brand":"BuildYourCNC","offers":[{"title":"Default Title","offer_id":47835021705390,"sku":null,"price":56.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0664\/7516\/3822\/files\/e64b69c5-b433-4a65-bfe0-90f4ab03604e_35b94c7f-1cde-4036-847d-df41bb1ba96d.jpg?v=1778288451"}],"url":"https:\/\/buildyuurcnc.com\/collections\/relays.oembed","provider":"BuildYourCNC","version":"1.0","type":"link"}