Derivative Action in PID Control Without Noise Problems
Learn what derivative action contributes to a PID loop, why it can amplify measurement noise and setpoint changes, and how filtering, sampling, and staged tests make D tuning safer.
Manufacturer: BECKHOFF
Product No.: C9900-E865
Country of origin:Germany
Product Type: Push-Button 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
The BECKHOFF C9900-E865 is an electromechanical push-button extension unit engineered for integration with BECKHOFF CP6xxx and CP7xxx series Control Panels and Panel PCs equipped with a 15-inch display without keyboard, including CP6x22 and CP7x22 models. Installed directly on the right-hand side of the operating unit, the extension consolidates manual machine operation controls onto the display housing. This tight integration eliminates the need for an external operator desk or secondary button console, streamlining machine station design while keeping vital electromechanical controls within immediate operator reach.
Equipped with 14 illuminated square push buttons (Siemens Signum, 30 x 30 mm) and one dedicated Siemens Signum emergency stop actuator, the unit provides direct tactile control for critical machine functions. Operator inputs are managed through a dual-path architecture: each push button transmits a normally-open (NO) contact status digitally via CP-Link or USB, while a secondary normally-open contact is routed directly to an internal terminal block for conventional hardwired logic. The integrated signal lamps are controlled digitally via the CP-Link or USB communication interface. For fail-safe machine stopping, the emergency stop push button is directly wireable into external safety circuits.
| Parameter | Specification |
|---|---|
| Manufacturer | BECKHOFF |
| Exact Model | C9900-E865 |
| Product Type | Push-button extension |
| Mounting Location | Right-hand side of Control Panel / Panel PC |
| Compatible Display Size | 15-inch display units without keyboard (CP6x22-00xx, CP7x22-00xx) |
| Lifecycle Status | Service phase |
| Country of Origin | Germany |
| Parameter | Specification |
|---|---|
| Push-Button Count | 14 push buttons with integrated signal lamps |
| Push-Button Key Type | Siemens Signum square, 30 x 30 mm |
| Emergency Stop Actuator | 1 emergency stop key (Siemens Signum), directly wireable |
| Labeling Option | Push-button caps accept individual label inserts |
| Parameter | Specification |
|---|---|
| Digital Interface | CP-Link or USB |
| Push-Button Primary Contact | Normally open (NO), transmitted via CP-Link or USB |
| Push-Button Secondary Contact | Normally open (NO), directly wireable via internal terminal row |
| Signal Lamp Control | Transmitted via CP-Link or USB only |
| Emergency Stop Wiring | Direct wiring via terminal row |
| Interface or Terminal | Function |
|---|---|
| CP-Link / USB Interface | Digital transmission of primary NO push-button signals and command control of signal lamps |
| Internal Terminal Row | Hardwired connection points for secondary NO push-button contacts |
| Emergency Stop Terminals | Hardwired connection points for direct integration into machine safety circuits |
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Returns & Warranty

Global Express Shipping
Returns & Warranty
Orders are processed and delivered Monday-Friday (excluding public holidays).
For full eligibility, restocking fees, and international return details, please view our official Refund & Return Policy .
| Country of origin |
Germany
|