Beckhoff C9900-E899 Push-Button Extension for CP6xxx and CP7xxx

Description

Designed to extend the physical command interface of 15-inch HMI terminals, the Beckhoff C9900-E899 mounts seamlessly to the right side of compatible control panels and panel PCs. This rugged push-button extension provides a bridge between tactile physical controls and digital industrial networks. Engineered specifically for CP6x23-00xx and CP7x23-00xx control panels, it enables local operation and monitoring without requiring a full integrated keyboard. The unit transmits button states over a single USB interface while maintaining physical terminal connections for safety-critical hardware circuits.

Key Features

• Tactile Control Layout: Outfitted with 20 square Siemens Signum push-buttons (30 x 30 mm) featuring integrated signal lamps.
• Dedicated Safety Command: Features 1 Siemens Signum emergency stop key, engineered for direct physical wiring to safety circuits.
• Flexible Signal Transmission: Dual-channel communication path transmits one normally-open (NO) contact over USB, while routing a second NO contact to an accessible terminal row for hardwired safety or PLC integration.
• Customizable Layout: Insertable labels for individual push-button caps allow fast, application-specific marking of functions and processes.
• USB Integrated Lamp Control: Status LED and signal lamp controls are managed cleanly over the primary USB connection.

Applications

• Custom assembly cells requiring local, physical override switches.
• Heavy industrial control environments integrating 15-inch Beckhoff Panel PCs.
• Automotive production lines requiring physical emergency stop placement immediately adjacent to the HMI screen.
• Tooling machines and CNC setups utilizing CP6xxx and CP7xxx systems.

Technical Specifications

Empirical Engineering Insights

Alternative Models & Compatibility

Because this module is currently in its service phase, verify mechanical alignment of retrofitted panels. This extension is engineered specifically for CP6x23 and CP7x23 series 15-inch displays lacking physical keypads; standard keypadded models (such as CP6x13 or CP7x13 series) do not support the chassis mounting tracks of the C9900-E899.

Application Pitfalls & Engineering Notes

Do not route safety critical control loops through the USB connection. Although button presses are transmitted over USB, Windows or real-time OS lag can disrupt signal transmission. Always use the built-in secondary terminal row for physical safety logic, interlocking systems, or critical cycle-stop commands.

Commissioning & Wiring Tips

When wiring the terminal row, use shielded control cables to prevent electrical noise coupling into the USB controller PCB. Ensure the panel grounding terminal is connected to the central low-impedance PE busbar to avoid USB connection drops caused by local industrial static charge.

Installation Guidelines