Overview
D+H CDP chain drives are high-capacity commercial window actuators for large façade windows, roof windows, skylights and other heavy-duty openings.
The CDP range sits at the upper end of D+H chain-drive capability. Single-chain CDP models provide up to 1500 N pressure force, while CDP-TW twin-chain models provide up to 3000 N pressure force through two chain connection points.
CDP drives are physically substantial actuators with heavy-duty internal components, large chain systems and robust mounting hardware. The sash brackets and frame brackets are engineered to transfer very high loads into the window structure, with stainless steel bracket components up to 6 mm thick depending on the selected arrangement.
Available 24 V DC and 230 V AC BSY+ versions support natural ventilation, general window automation and smoke control systems. EBSA can assist with selecting the drive configuration, stroke, power supply, synchronisation arrangement, brackets, structural fixings and control panel for the project.
CDP range at a glance
| Product type | Heavy-duty high-capacity chain drive |
|---|---|
| Manufacturer | D+H Mechatronic |
| Models covered | CDP 1500 single-chain and CDP-TW 3000 twin-chain models |
| Typical applications | Large-window natural ventilation, general window automation, roof and skylight operation, and smoke control systems |
| Window types | Large façade windows, roof windows, skylights and high-load commercial openings |
| Power and control options | 24 V DC BSY+ and 230 V AC BSY+ configurations |
| Pressure force | Up to 1500 N for single-chain CDP models and 3000 N for CDP-TW twin-chain models |
| Tensile force | Up to 1000 N for single-chain CDP models and 2000 N for CDP-TW twin-chain models |
| Available strokes | Up to 1500 mm depending on the selected model and power supply |
| Sound level | LpA ≤ 70 dB(A) |
| Protection rating | IP 32 |
| Fire resistance | B300 |
| Synchronisation | BSY+ synchronised drive technology |
| Bracket construction | Heavy-duty sash and frame bracket arrangements, including stainless steel components up to 6 mm thick depending on configuration |
| Control requirements | Compatible controller, correctly sized power supply, field cabling and project-specific programming and commissioning |
Models and configurations
| Model | Supply and control technology | Force | Stroke | Product data |
|---|---|---|---|---|
| CDP 1500-BSY+ | 24 V DC BSY+ | 1500 N pressure / 1000 N tensile | 800 mm | Download datasheet |
| CDP 1500-BSY+ | 24 V DC BSY+ | 1500 N pressure / 1000 N tensile | 1000 mm | Download datasheet |
| CDP 1500-K-BSY+ | 230 V AC BSY+ | 1500 N pressure / 1000 N tensile | 800–1500 mm | Download product data |
| CDP-TW 3000-BSY+ | 24 V DC BSY+ twin-chain | 3000 N pressure / 2000 N tensile | 600–1500 mm | Download product data |
| CDP-TW 3000-K-BSY+ | 230 V AC BSY+ twin-chain | 3000 N pressure / 2000 N tensile | 800–1500 mm | Download product data |
Single-chain and twin-chain CDP drives
CDP 1500 models use one heavy-duty chain connection point and provide up to 1500 N pressure force and 1000 N tensile force.
CDP-TW 3000 models use two chain connection points from one drive assembly. The twin-chain arrangement provides up to 3000 N combined pressure force and 2000 N combined tensile force while distributing the drive load across two points on the sash.
The correct arrangement depends on the sash width, weight, stiffness, opening geometry, available fixing points and how the load should be transferred into the window frame.
Heavy-duty construction and load transfer
CDP is not an oversized version of a standard ventilation drive. It is a purpose-built heavy-duty actuator intended for windows and openings with exceptional force, stroke and structural requirements.
The drive body, chains, sash brackets and frame brackets are all substantial components. Bracket arrangements may incorporate stainless steel plates up to 6 mm thick to transfer the actuator loads into the sash and supporting frame.
The window system must be engineered to resist the drive forces. Aluminium profiles, steel reinforcement, corner joints, glazing support, brackets and fasteners must form a continuous and adequately designed load path.
Applying a high-capacity drive to an inadequately reinforced sash or frame can result in distortion or structural damage to the window system before the drive reaches its available force.
Typical applications
- Large commercial façade windows.
- Heavy roof windows and skylight systems.
- Large natural ventilation openings.
- Smoke control systems.
- Windows requiring very high opening or closing force.
- Applications requiring strokes up to 1500 mm.
- Large or wide sashes requiring twin-chain force distribution.
- Projects requiring synchronised high-load drive operation.
Drive and control system selection
The CDP drive provides the mechanical opening and closing movement, while the selected controller determines how the window responds to switches, sensors, timers, BMS commands or smoke control signals.
BSY+ technology synchronises compatible drives or internal drive elements so that they operate as a coordinated system. This is particularly important where high forces are applied through multiple connection points or multiple actuators.
The control panel and field cabling must be sized for the selected drive configuration, voltage, current demand, cable length and number of drives operating together.
For applications requiring automated ventilation, rain control, temperature control, feedback, programmed logic or smoke control functions, the drive and controller should be selected as one coordinated system.
CDP selection should consider:
- Window type, sash dimensions, weight and stiffness.
- Required pressure and tensile force.
- Required stroke and opening angle.
- Chain pressure-load capacity at the selected extension.
- Single-chain or twin-chain force distribution.
- 24 V DC or 230 V AC power supply.
- Drive current and control-panel capacity.
- BSY+ synchronisation requirements.
- Bracket geometry and structural fixing locations.
- Window-profile reinforcement and load transfer.
- Field cabling, cable routes and maintenance access.
- Natural ventilation, smoke control or combined operating strategy.
Bracket and structural coordination
The CDP bracket arrangement must be designed as part of the window system rather than selected after the window has been fabricated.
The sash bracket transfers the chain force into the opening sash, while the frame brackets secure the actuator to the supporting frame or structure. Both sides of this connection require adequate material thickness, reinforcement, fasteners and edge distances.
EBSA can review window drawings, aluminium profile sections, reinforcement details and opening geometry to select standard D+H brackets or develop a project-specific bracket arrangement.
For large or bespoke openings, early coordination with the façade contractor, window fabricator, structural engineer and controls contractor is recommended.
Compatible system components
Depending on the project, CDP chain drives may be used with:
- High-capacity natural ventilation control panels.
- D+H smoke control panels.
- CPS-M project control panels.
- Wall switches and local control points.
- Room temperature controls.
- Rain and weather sensors.
- Timers and programmed operating functions.
- BMS and third-party interfaces.
- D+H CDP sash and frame brackets.
- Project-specific structural bracket systems.
Downloads
Select the installation instructions that match the drive type, power supply and chain arrangement. Confirm the exact model, stroke, current demand, bracket system and controller compatibility before installation.
| Drive type | Applies to | Installation instructions |
|---|---|---|
| CDP 1500-BSY+ | 24 V DC single-chain models | CDP 1500-BSY+ instructions |
| CDP-TW 3000-BSY+ | 24 V DC twin-chain models | CDP-TW 3000-BSY+ instructions |
| CDP 1500-K-BSY+ | 230 V AC single-chain models | CDP 1500-K-BSY+ instructions |
| CDP-TW 3000-K-BSY+ | 230 V AC twin-chain models | CDP-TW 3000-K-BSY+ instructions |
Frequently asked questions
How powerful is a CDP chain drive?
Single-chain CDP models provide up to 1500 N pressure force and 1000 N tensile force.
CDP-TW twin-chain models provide up to 3000 N combined pressure force and 2000 N combined tensile force through two chain connection points.
How large and heavy is a CDP drive?
CDP is a substantial heavy-duty commercial actuator. The drive body, chains and brackets are considerably larger and heavier than those used with conventional window automation drives.
Its size and weight must be considered during handling, installation, window fabrication and maintenance-access planning.
Why are CDP brackets so substantial?
The brackets must transfer drive forces of up to 1500 N or 3000 N into the window sash and supporting frame.
Depending on the arrangement, CDP bracket systems can include stainless steel components up to 6 mm thick. The window profiles, reinforcement and fasteners must be capable of carrying the same loads.
What is the difference between CDP 1500 and CDP-TW 3000?
CDP 1500 uses one chain connection point and provides up to 1500 N pressure force and 1000 N tensile force.
CDP-TW 3000 uses two chain connection points and provides up to 3000 N pressure force and 2000 N tensile force. The twin-chain arrangement also distributes the force across two positions on the sash.
Can CDP chain drives be used for smoke control?
Yes. CDP chain drives are used in high-load D+H smoke control systems as well as natural ventilation systems.
The drive, window, control panel, fire alarm interface, field cabling, brackets and operating strategy must be coordinated as one complete system.
Should I use a 24 V DC or 230 V AC CDP drive?
A 24 V DC system is generally preferred where smoke control, battery-backed operation, sensors, automated ventilation, feedback or broader control-system integration is required.
A 230 V AC model may suit projects designed around mains-powered drives or a specific local control arrangement.
What is BSY+ synchronisation?
BSY+ coordinates compatible drive elements so that they move together and share the applied load.
This is particularly important on CDP installations because uneven movement at these force levels could place substantial twisting or racking loads into the sash and brackets.
How is the correct CDP stroke selected?
CDP models are available with strokes extending up to 1500 mm depending on the selected configuration.
The required stroke depends on the hinge position, sash geometry, bracket location, required opening angle and available clearance. Chain pressure-load capacity must also be checked at the selected extension.
Can multiple CDP drives operate on one opening?
Yes, where the drives, controller and BSY+ configuration are designed for synchronised operation.
The window and bracket system must distribute the load correctly between the drives, and the complete drive set must be configured and commissioned together.
Can a CDP drive damage an inadequately designed window?
CDP can apply forces greater than many conventional window systems are designed to resist.
The window frame, sash, corner joints, brackets, fixings and reinforcement must therefore be checked for the full actuator loads. The drive should not be installed onto a window that has not been designed or verified for the required force.
When should a rack and pinion drive be considered instead?
Rack and pinion drives may be preferred where the opening geometry, external exposure, structural arrangement or required rigid push force is better suited to a rack actuator.
EBSA can compare CDP and rack and pinion arrangements against the window load, stroke, available space and structural fixing locations.
Compare other drive families
- VCD Chain Drives: compact drives for natural ventilation and general window automation.
- CDC Chain Drives: compact, low-noise drives for natural ventilation, window automation and smoke control systems.
- KA Chain Drives: commercial chain drives with 300 N, 500 N and 600 N force options.
- CDM Chain Drives: compact heavy-duty drives with 700 N and 1000 N operating-force options.
- Rack & Pinion Drives: robust linear drives for applications better suited to rack and pinion operation.
CDP chain drive selection support
CDP drive selection requires coordination of the window structure, required force and stroke, single-chain or twin-chain arrangement, BSY+ synchronisation, bracket design, reinforcement, control-panel capacity, field cabling and operating strategy.
EBSA can assist with selecting and coordinating the CDP drive, control panel, brackets, structural requirements and installation arrangement for the project.
