C9900-E855 | BECKHOFF | Extension à bouton-poussoir pour panneaux de commande CP6xxx et CP7xxx et Panel PC avec écran 15 pouces sans clavier (phase de service)

Description

Integrating physical control elements directly alongside industrial displays, the Beckhoff C9900-E855 push-button extension expands operator interface capabilities on CP6xxx and CP7xxx Control Panels and Panel PCs. Designed specifically for 15-inch display models without integrated keyboards, this robust hardware add-on mounts on the right-hand side of the display housing, streamlining manual operations and emergency stop interventions. The assembly is currently in its service phase, making it a critical spare part for maintaining legacy HMI systems.

Features

• Ergonomic Layout: Designed for right-side mounting on 15-inch displays, providing natural auxiliary control accessibility.
• Tactile Key Elements: Equipped with 16 square Siemens Signum push-buttons (30 x 30 mm) featuring integrated signal lamps for visual feedback.
• Safety Integration: Features one high-visibility Siemens Signum emergency stop switch, directly wireable to dedicated safety relays.
• Dual Connection Path: All primary push-button operations transmit digitally via CP-Link or USB using a normally-open (NO) contact, while secondary NO contacts are routed to an independent terminal row for hardware bypass.
• Customizable Legend: Slotted design allows for quick installation of slide-in labels beneath push-button caps for individual key identification.

Applications

• Automotive assembly lines and machining cells using Beckhoff CP6x12 or CP7x12 HMIs.
• Process control workstations requiring a combination of touchscreen inputs and physical override switches.
• Legacy machine retrofits where direct physical E-stop integration is mandatory.

Technical Specifications

Connections and Interfaces

Empirical Engineering Insights

Alternative Models & Compatibility

This unit is specifically dimensioned for legacy 15-inch housings without keyboards (CP6x12 and CP7x12). When upgrading or replacing older control hardware, verify the exact suffix code of your Control Panel; attempting to pair this module with 12-inch or 19-inch variants will cause physical layout mismatch and mounting failure.

Application Pitfalls & Engineering Notes

Note that the integrated signal lamps cannot be actuated via the secondary hardwired terminal strip. They operate exclusively via commands sent through the CP-Link or USB protocol. If the communication interface is interrupted, status feedback via the signal lamps will be lost, even if the primary dry contacts remain connected via hardwiring.

Commissioning & Wiring Tips

Always run the emergency stop circuit through the direct terminal row directly to an approved safety evaluation unit (such as Beckhoff TwinSAFE or an external Category 4 safety relay). Do not rely on CP-Link or USB communication paths for functional safety emergency stop commands.

Installation Guidelines

1. 1 Align the physical mounting brackets of the extension module with the right-hand chassis mounting points of the CP6xxx/CP7xxx housing.
2. 2 Securely fasten the mounting screws to the specified torque limit to guarantee seal integrity and prevent vibration damage.
3. 3 Connect the USB/CP-Link communications cable to the designated rear interface port on the Control Panel.
4. 4 Route the safety circuit wiring directly from the emergency stop switch terminals to your safety controller, testing continuity before powering up the system.