{"product_id":"beckhoff-c9900-e789-push-button-extension-for-cp6xxx-and-cp7xxx-control-panels-and-panel-pcs","title":"BECKHOFF C9900-E789 Push-button extension for CP6xxx and CP7xxx Control Panels and Panel PCs","description":"\u003cp\u003eThe \u003cstrong\u003eBECKHOFF C9900-E789\u003c\/strong\u003e is a push-button extension designed for integration below CP6942, CP7942 Control Panels and CP6242, CP6442, CP6542, and CP7242 Panel PCs featuring 15-inch displays without keyboards. It serves as a physical operator interface for machine tools, routing discrete actuation and state indication signals via USB and direct-wire terminal connections.\u003c\/p\u003e\n\u003ch3\u003eTechnical Summary\u003c\/h3\u003e\n\u003cp\u003eThis control panel extension provides a localized physical interface for machine control applications. It integrates discrete inputs and outputs through a dual-channel architecture: a USB interface handles serial data transmission for primary push-button state reporting and exclusive control of the indicator lights, while independent terminal rows allow parallel, hardwired connection for critical control loops. An integrated Gray code switch provides absolute position encoding over USB, and a front-accessible dual-port USB hub extends backplane connectivity for external peripherals.\u003c\/p\u003e\n\u003ch3\u003eHardware Specifications\u003c\/h3\u003e\n\u003ctable\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd data-row=\"1\"\u003e\u003cstrong\u003eParameter\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd data-row=\"1\"\u003e\u003cstrong\u003eSpecification\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd data-row=\"2\"\u003e\u003cstrong\u003eBrand\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd data-row=\"2\"\u003eBECKHOFF\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd data-row=\"3\"\u003e\u003cstrong\u003eModel\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd data-row=\"3\"\u003eC9900-E789\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd data-row=\"4\"\u003e\u003cstrong\u003eProduct Type\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd data-row=\"4\"\u003ePush-button extension\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd data-row=\"5\"\u003e\u003cstrong\u003eSeries Compatibility\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd data-row=\"5\"\u003eCP6xxx and CP7xxx Control Panels \/ Panel PCs with 15-inch displays\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd data-row=\"6\"\u003e\u003cstrong\u003ePush-button Keys\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd data-row=\"6\"\u003e16 square keys (30 x 30 mm, Siemens Signum type) with integrated signal lamps\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd data-row=\"7\"\u003e\u003cstrong\u003eEmergency Stop\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd data-row=\"7\"\u003e1 Siemens Signum emergency stop key, directly wireable\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd data-row=\"8\"\u003e\u003cstrong\u003ePrimary Communication\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd data-row=\"8\"\u003eUSB interface for normally-open contacts and indicator lights\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd data-row=\"9\"\u003e\u003cstrong\u003eSecondary Connection\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd data-row=\"9\"\u003eTerminal row for direct wiring of a second normally-open contact per key\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd data-row=\"10\"\u003e\u003cstrong\u003ePosition Switch\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd data-row=\"10\"\u003e1 Gray code switch with 23 positions (transmitted via USB)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd data-row=\"11\"\u003e\u003cstrong\u003eFront Interface\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd data-row=\"11\"\u003e2-port USB A interface with IP65 screw cap\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd data-row=\"12\"\u003e\u003cstrong\u003eShipping Weight\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd data-row=\"12\"\u003e5 kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3\u003eEngineering Notes\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSignal Logic:\u003c\/strong\u003e The 16 standard push-buttons feature split-circuit routing. The first normally-open (NO) contact maps to the internal USB controller for cyclic data exchange with the host PC. The second NO contact is mechanically isolated and routed directly to the terminal block for traditional 24 VDC I\/O routing to a PLC backplane.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIndicator Control:\u003c\/strong\u003e The integrated signal lamps within the 16 push-buttons do not possess local hardwired inputs. Their activation states are driven exclusively via downstream USB command strings from the host controller.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSafety Circuits:\u003c\/strong\u003e The emergency stop switch bypasses the internal USB bus entirely. It must be integrated into the local safety relay or safety PLC circuit using the direct-wire terminals to meet machine safety standards.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGray Code Switch:\u003c\/strong\u003e The 23-position rotary switch utilizes gray code formatting to prevent ambiguous bit transitions during rotation, transmitting the absolute position data directly over the USB interface.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eField Guidelines\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eEMC Separation \u0026amp; Shielding:\u003c\/strong\u003e To prevent signal corruption on the USB bus, route the internal USB uplink cable away from high-voltage AC motor leads and variable frequency drive (VFD) output cables. Ensure the control panel housing achieves low-impedance grounding to the machine chassis.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTerminal Wiring:\u003c\/strong\u003e When wiring the secondary NO contacts to the terminal row, use fine-stranded copper conductors with insulated ferrules. Observe standard torque ratings on the screw terminals to prevent contact damage.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIngress Protection:\u003c\/strong\u003e The front-accessible 2-port USB A interface achieves its IP65 rating only when the protective screw cap is fully engaged and tightened against the gasket. Ensure the cap is secured whenever the front ports are not actively servicing external equipment.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eThe \u003cstrong\u003eBECKHOFF C9900-E789\u003c\/strong\u003e is a push-button extension designed for integration below CP6942, CP7942 Control Panels and CP6242, CP6442, CP6542, and CP7242 Panel PCs featuring 15-inch displays without keyboards. It serves as a physical operator interface for machine tools, routing discrete actuation and state indication signals via USB and direct-wire terminal connections.\u003c\/p\u003e\n\u003ch3\u003eTechnical Summary\u003c\/h3\u003e\n\u003cp\u003eThis control panel extension provides a localized physical interface for machine control applications. It integrates discrete inputs and outputs through a dual-channel architecture: a USB interface handles serial data transmission for primary push-button state reporting and exclusive control of the indicator lights, while independent terminal rows allow parallel, hardwired connection for critical control loops. An integrated Gray code switch provides absolute position encoding over USB, and a front-accessible dual-port USB hub extends backplane connectivity for external peripherals.\u003c\/p\u003e\n\u003ch3\u003eHardware Specifications\u003c\/h3\u003e\n\u003ctable\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd data-row=\"1\"\u003e\u003cstrong\u003eParameter\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd data-row=\"1\"\u003e\u003cstrong\u003eSpecification\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd data-row=\"2\"\u003e\u003cstrong\u003eBrand\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd data-row=\"2\"\u003eBECKHOFF\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd data-row=\"3\"\u003e\u003cstrong\u003eModel\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd data-row=\"3\"\u003eC9900-E789\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd data-row=\"4\"\u003e\u003cstrong\u003eProduct Type\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd data-row=\"4\"\u003ePush-button extension\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd data-row=\"5\"\u003e\u003cstrong\u003eSeries Compatibility\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd data-row=\"5\"\u003eCP6xxx and CP7xxx Control Panels \/ Panel PCs with 15-inch displays\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd data-row=\"6\"\u003e\u003cstrong\u003ePush-button Keys\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd data-row=\"6\"\u003e16 square keys (30 x 30 mm, Siemens Signum type) with integrated signal lamps\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd data-row=\"7\"\u003e\u003cstrong\u003eEmergency Stop\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd data-row=\"7\"\u003e1 Siemens Signum emergency stop key, directly wireable\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd data-row=\"8\"\u003e\u003cstrong\u003ePrimary Communication\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd data-row=\"8\"\u003eUSB interface for normally-open contacts and indicator lights\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd data-row=\"9\"\u003e\u003cstrong\u003eSecondary Connection\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd data-row=\"9\"\u003eTerminal row for direct wiring of a second normally-open contact per key\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd data-row=\"10\"\u003e\u003cstrong\u003ePosition Switch\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd data-row=\"10\"\u003e1 Gray code switch with 23 positions (transmitted via USB)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd data-row=\"11\"\u003e\u003cstrong\u003eFront Interface\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd data-row=\"11\"\u003e2-port USB A interface with IP65 screw cap\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd data-row=\"12\"\u003e\u003cstrong\u003eShipping Weight\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd data-row=\"12\"\u003e5 kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd data-row=\"13\"\u003e\u003cstrong\u003eLifecycle Status\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd data-row=\"13\"\u003eService phase\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3\u003eEngineering Notes\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSignal Logic:\u003c\/strong\u003e The 16 standard push-buttons feature split-circuit routing. The first normally-open (NO) contact maps to the internal USB controller for cyclic data exchange with the host PC. The second NO contact is mechanically isolated and routed directly to the terminal block for traditional 24 VDC I\/O routing to a PLC backplane.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIndicator Control:\u003c\/strong\u003e The integrated signal lamps within the 16 push-buttons do not possess local hardwired inputs. Their activation states are driven exclusively via downstream USB command strings from the host controller.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSafety Circuits:\u003c\/strong\u003e The emergency stop switch bypasses the internal USB bus entirely. It must be integrated into the local safety relay or safety PLC circuit using the direct-wire terminals to meet machine safety standards.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGray Code Switch:\u003c\/strong\u003e The 23-position rotary switch utilizes gray code formatting to prevent ambiguous bit transitions during rotation, transmitting the absolute position data directly over the USB interface.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eField Guidelines\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eEMC Separation \u0026amp; Shielding:\u003c\/strong\u003e To prevent signal corruption on the USB bus, route the internal USB uplink cable away from high-voltage AC motor leads and variable frequency drive (VFD) output cables. Ensure the control panel housing achieves low-impedance grounding to the machine chassis.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTerminal Wiring:\u003c\/strong\u003e When wiring the secondary NO contacts to the terminal row, use fine-stranded copper conductors with insulated ferrules. Observe standard torque ratings on the screw terminals to prevent contact damage.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIngress Protection:\u003c\/strong\u003e The front-accessible 2-port USB A interface achieves its IP65 rating only when the protective screw cap is fully engaged and tightened against the gasket. Ensure the cap is secured whenever the front ports are not actively servicing external equipment.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eSuffix Breakdown\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eCP6xxx \/ CP7xxx Compatibility:\u003c\/strong\u003e Form-factor and mounting brackets are mechanically optimized specifically for 15-inch display variants within these series that lack integrated physical keyboards.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eService Phase:\u003c\/strong\u003e This unit is designated for maintenance, legacy system expansion, and direct field replacement within existing automation lines.\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"BECKHOFF","offers":[{"title":"Default Title","offer_id":53106397348203,"sku":"C9900-E789","price":100.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0953\/3227\/0443\/files\/c9900-e789-ejn3srdodqg.png?v=1776243603","url":"https:\/\/www.plcprotech.com\/products\/beckhoff-c9900-e789-push-button-extension-for-cp6xxx-and-cp7xxx-control-panels-and-panel-pcs","provider":"PLC ProTech Ltd.","version":"1.0","type":"link"}