Description
Designed to expand physical operator control layout directly on the machine-mount level, the Beckhoff C9900-E515 provides integrated mechanical switches and signaling for CP6xxx and CP7xxx Control Panels and Panel PCs. This hardware extension mounts on the right side of 15-inch displays that do not feature built-in keyboards. It bridges the gap between software-based touch operations and safety-critical physical command interfaces, ensuring immediate tactile response for machine operators in high-reliability environments.
Features
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Ergonomic Layout: Designed for seamless mechanical alignment on the right-hand side of 15-inch display housings.
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Tactile Control Array: Equipped with 16 push-button keys featuring integrated signal lamps for clear status feedback.
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Standardized Actuators: Uses square Siemens Signum type (30 x 30 mm) push-button components.
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Dedicated Safety Control: Features one Siemens Signum emergency stop key designed for direct physical wiring to safety circuits.
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Dual-Channel Transmission: Supports transmission via CP-Link or USB with one normally-open contact, alongside a direct-wire terminal row for a second normally-open contact.
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Custom Labeling: Features field-replaceable push-button caps allowing individual insert labels for custom symbols or text.
Applications
- Custom HMI console integration on CNC machinery and production lines.
- Main control panel expansion for CP6x31-00xx and CP7x31-00xx environments.
- Automotive assembly cell control requiring physical emergency stop and feedback indicators.
- Process control environments demanding mechanical override push-buttons alongside touchscreen interfaces.
Technical Specifications Table
| Parameter |
Specification Value |
| Manufacturer |
Beckhoff Automation |
| Model / Article Number |
C9900-E515 |
| Device Type |
Push-button extension for Control Panels |
| Compatible Panel Sizes |
15-inch display without keyboard |
| Compatible Series |
CP6x31-00xx and CP7x31-00xx Series |
| Physical Mounting Position |
Right side of the host panel |
| Key Configuration |
16 square push-buttons with integrated lamps (30 x 30 mm) |
| Actuator Type |
Siemens Signum square series |
| Emergency Stop Key |
1x Siemens Signum emergency stop, directly wireable |
| Control Communication Channels |
CP-Link or USB (for 1st NO contact + feedback lamps) |
| Hardwired Interface |
Direct terminal block row (for 2nd NO contact on push-buttons) |
| Lifecycle Phase |
Service Phase (Legacy support and spare part availability) |
| Shipping Weight (Calculated) |
5.0 kg (11.0 lbs) |
Connections and Interfaces
| Interface Connection |
Signal / Target Assignment |
| CP-Link / USB Bus Connection |
Primary digital status feedback for 16 keys & active state of 16 signal lamps. |
| Internal Direct Terminal Block |
Provides hardwired access to the second normally-open (NO) contacts for physical interlock circuits. |
| Emergency Stop Contact Blocks |
Isolated, direct-wired safety-rated terminals for integration into dual-channel safety monitoring loops. |
Empirical Engineering Insights
Alternative Models & Compatibility
This expansion panel is designed specifically for 15-inch displays without a built-in keyboard unit. Attempting to fit this hardware extension onto smaller (12-inch) or larger (19-inch) panels is not mechanically viable due to mounting hole spacing mismatch and physical height variations. If dealing with legacy installations, note that the internal logic boards are hard-configured for either CP-Link or USB connection protocols depending on the host panel’s input card variant.
Application Pitfalls & Engineering Notes
While status signal transmission for standard push-buttons can safely run via CP-Link or USB communication, critical safety functions must never depend solely on these bus channels. The integrated Emergency Stop button and the second normally-open (NO) contacts are intentionally isolated. To ensure proper functional safety compliance (Performance Level d/e), always route the Emergency Stop contact blocks to dedicated external safety relay units or TwinSAFE input modules.
Commissioning & Wiring Tips
When routing auxiliary wiring from the internal terminal row, utilize shielded cables to prevent electromagnetic coupling within environments featuring large variable frequency drives (VFDs). The 30 x 30 mm Siemens Signum switch caps can be easily removed using a standardized extraction tool; when installing custom printed labels, ensure the material used can withstand operating temperatures inside closed enclosures, which can regularly reach up to 55 degC.
Installation Guidelines
CRITICAL WARNING: Prior to initiating physical assembly or electrical integration, completely isolate and de-energize the host Control Panel or Panel PC. Ensure all control-voltage supply lines are locked out and tagged out. Verify the absence of residual static charges before accessing internal wire connection terminals to protect sensitive bus interface electronics.
1
Align the extension frame with the right side of the CP6xxx or CP7xxx host panel enclosure, ensuring the integrated seal is positioned correctly to maintain overall ingress protection ratings.
2
Tighten the mounting screws evenly to the recommended torque specifications, preventing over-tightening which could distort the gasket profile.
3
Connect the internal ribbon or USB interface cable to the dedicated internal port on the main host board.
4
Route safety wiring from the Emergency Stop element and external interlocks out through the designated cable glands directly to the central control cabinet.