Beckhoff C9900-E855 Control Panel Series Push-Button Extension

SKU C9900-E855

In stock

12-month warranty
Free returns within 30 days

Manufacturer: BECKHOFF
Product No.: C9900-E855
Country of origin:Germany
Product Type: HMI Accessories & Extensions
Payment: T/T, Western Union
Weight: 500g
Dimensions: drawings with dimensions of the push-button e x tensions as AutoCAD DXF file
Shipping port: Xiamen
Warranty: 12 months

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

Manufacturer	Beckhoff Automation
Model / Article Number	C9900-E855
Product Type	Push-button Extension Module (Right Side)
HMI Compatibility	CP6x12-00xx and CP7x12-00xx (15-inch display without keyboard)
Push-button Type	16 x Siemens Signum square keys (30 x 30 mm) with signal lamps
Emergency Stop	1 x Siemens Signum E-stop switch (directly wireable)
Interface Options	CP-Link or USB (for primary NO contacts and signal lamps)
Secondary Wiring	Terminal strip for direct hardwiring of secondary NO contacts
Current Lifecycle Status	Service Phase
Shipping Weight (Calculated)	5.0 kg

Connections and Interfaces

Connection Path	Function / Circuit Assignment
CP-Link / USB Interface	Transmits visual lamp outputs and primary NO push-button state changes to the host controller.
Direct Terminal Row	Allows direct point-to-point hardwiring of the secondary NO contacts for safety relays or external PLC input cards.
Emergency Stop Terminal	Direct dry-contact terminal blocks for emergency loop integration. Does not route safety critical stops over USB.

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

CRITICAL WARNING: Prior to mounting or wiring the push-button extension, ensure all power sources to the host Control Panel / Panel PC and auxiliary control loops are completely de-energized. Failure to isolate power may result in communication circuit damage or unexpected machine actuation.

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

FAQ

Can the signal lamps on the C9900-E855 be directly hardwired to a digital PLC output module?

No. The signal lamps inside the 16 Siemens Signum push-buttons receive their control and activation signals exclusively via the integrated CP-Link or USB communication interface.

How is the emergency stop button integrated into functional safety systems?

The Siemens Signum emergency stop switch features an independent contact block designed for direct wiring via the dry terminal strip, allowing standard integration into dual-channel safety relays.

Does this extension module support both CP-Link and USB communication simultaneously?

The module utilizes either CP-Link or USB depending on the interface of the parent Control Panel it is attached to, transmitting the primary key operations over the active bus.

Is the C9900-E855 compatible with all Beckhoff HMI screen sizes?

No. This extension is physically dimensioned and configured specifically for 15-inch vertical alignment on CP6x12 and CP7x12 Control Panels without physical keyboards.

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Global Express Shipping

Standard Delivery: 4-6 Business Days via DHL, FedEx, and UPS.
Express Dispatch: Same-day dispatch for in-stock orders placed before 2:00 PM (GMT+8).
Worldwide Coverage: Serving over 150 countries, including rapid delivery to Saudi Arabia and UAE.

Returns & Warranty

30-Day Guarantee: Returns accepted for in-stock products in original, factory-sealed packaging.
12-Month Warranty: Every industrial component is backed by our professional technical warranty.

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TECHNICAL SPECIFICATIONS

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