Beckhoff C9900-E731 Control Panel Push-Button Extension Module

Description

Designed to expand the manual control capabilities of CP6x13-00xx and CP7x13-00xx control panels, the Beckhoff C9900-E731 is a physical push-button extension designed for right-side installation. It integrates directly with 15-inch touch screen systems that do not feature built-in hardware keyboards. This module bridges physical tactile control and digital systems, offering independent physical contact routing for critical operator commands.

Features

• Comprehensive Tactile Interface: Equipped with 20 square Siemens Signum push-button keys (30 x 30 mm) featuring built-in signal lamps.
• Integrated Safety Control: Features 1 high-visibility Siemens Signum emergency stop key, routed independently for direct safety circuit integration.
• Dual-Signal Contact Design: Transmits primary key closures via USB as a normally-open (NO) contact, while a second independent NO contact is routed to a physical terminal block for direct hardware interlocks.
• Customizable Legend Plates: Slide-in labels allow rapid, clear labeling of individual button functions.
• USB Communication Bus: Facilitates control of all integrated signal lamps exclusively through USB, minimizing enclosure wiring density.

Applications

• Automotive assembly cell and production line HMIs.
• Heavy machinery requiring physical cycle start, stop, and jog buttons adjacent to visual panels.
• Safety-critical control zones requiring dual-channel hardware feedback loops.
• Legacy panel system retrofitting during maintenance and service phases.

Technical Specifications Table

Connections and Interfaces

Alternative Models & Compatibility

The C9900-E731 is currently in its service phase. When retrofitting or replacing this unit, confirm that your existing host control panel features a 15-inch display without a physical keyboard (specifically models CP6x13 or CP7x13). This extension is mechanically tailored for right-side mounting only; left-side mount options require different model designations due to enclosure profile alignments.

Application Pitfalls & Engineering Notes

Safety Integration Notice: Under no circumstances should the USB communication interface be used to process safety-critical controls. The first contact (USB) is for visualization or standard control routines. High-safety functions—such as the integrated Emergency Stop and the secondary physical NO contacts—must be wired directly through the terminal row to an approved, dual-channel safety relay or a functional TwinSAFE terminal (e.g., Beckhoff EL1904).

Commissioning & Wiring Tips

When routing the direct wiring lines from the terminal row alongside the USB communication cable, utilize shielded cabling for the digital signals. High-frequency electromagnetic interference from nearby variable frequency drives (VFDs) can induce electrical noise on unshielded lines, resulting in false state transitions within the controller's input registers.

Installation Guidelines