Beckhoff C9900-E871 CP6xxx CP7xxx Push-button Extension

Description

Designed for direct integration onto the right side of Beckhoff CP6x32-00xx and CP7x32-00xx Control Panels, the Beckhoff C9900-E871 provides an auxiliary physical interface expansion for 15-inch HMI displays operating without an integrated keyboard. This rugged operator panel extension interfaces critical mechanical controls directly to the host control system, bridging physical actuation with digital bus communication. By incorporating industrial-grade switches and a dedicated emergency stop, it enhances spatial efficiency and operating convenience directly at the machine face.

Features

• 18 Illuminated Push-Buttons: Equipped with high-durability Siemens Signum square keys (30 x 30 mm) containing integrated signal lamps.
• Integrated Emergency Stop: Features one heavy-duty Siemens Signum emergency stop button designed for direct safety circuit integration.
• Dual-Signal Routing: Transmits all push-button inputs via CP-Link or USB connection as a primary normally-open (NO) contact, with an independent secondary NO contact mapped directly to a terminal block.
• Bus-Driven Indicator Lamps: Coordinates all signal lamp illumination strictly through CP-Link or USB communication protocols.
• Customizable Legend Strips: Supports insertable label caps for rapid, application-specific functional engraving or text marking.

Applications

• Automotive manufacturing assembly and machining cell control stations.
• CNC machine tools and heavy industrial material handling systems.
• Process control setups utilizing 15-inch fanless industrial PCs and HMI panels.
• Safety-critical physical override environments demanding hardwired E-stop circuits.

Technical Specifications Table

Connections and Interfaces

Empirical Engineering Insights

Alternative Models & Compatibility

The C9900-E871 is structurally sized to physically align only with 15-inch variants of the CP6x32 and CP7x32 control panels. If you are retrofitting a system with a different display size, this extension block will not mate correctly with the chassis mountings. Verify that the matching driver software or TwinCAT system manager configurations are set to recognize the USB-based keyboard emulation profile utilized by this extension.

Application Pitfalls & Engineering Notes

A common site failure involves trying to wire the 24V indicator lamps directly through the terminal strip. Note that the signal lamps are exclusively controlled via the digital USB or CP-Link connection. If your system application loses USB communication, the indicator lamps will remain dark, regardless of local direct terminal status. Ensure your PLC logic accounts for this behavior in high-duty environments.

Commissioning & Wiring Tips

To maintain compliance with Category 3 or 4 safety standards, never route the emergency stop signal through the USB/CP-Link bus. The integrated emergency stop button must be wired directly to an approved safety controller or monitoring relay utilizing the physical auxiliary contacts provided on the back of the extension assembly.

Installation Guidelines