ABB machinery drives are designed to meet the production and performance needs of machine builders, system integrators, panel builders and end users in a broad range of applications. The compact design of the ACS850 low voltage AC drive makes it ideal for cabinet installation. Direct torque control provides highly accurate motor torque and speed control without any encoder feedback. Depending on the challenges of the application, the drive can be programmed in a variety of ways. The drive's integrated safety function helps to enhance the safe operation of the application.
Highlights of the ACS850
- Compact size, ideal for cabinets
- Easy access to power terminals in cabinet installations
- DTC (direct torque control) as standard for highly accurate motor torque and speed control
- Wide range of options including fieldbuses and PC tools
- Safe torque off (STO) as standard
- Maintenance and diagnostic assistants
- Removable memory unit
Diverse options provide flexibility
ACS850 drives feature many options, including various speed feedback devices and different fieldbus adapters. Extensive set of standard inputs and outputs provide easy integration into most applications.
Safety as standard
The drive’s safety functions comply with European Union Machinery Directive 2006/42/EC. Functional safety is provided by integrated safe torque off (STO), which removes the torque from the motor shaft. Other safety functions such as safe brake control (SBC) and safely limited speed (SLS) are available when combined with external safety components.
Applications
ACS850 drives are suitable for:
- Cranes
- Extruders
- Conveyors
- Winders
- Pumps
- Fans
- Mixers
The drives provide configuration flexibility from simple parameter linking to creating custom function block programs. A crane control program, developed by ABB is also available.
Cost efficient cabinet assembly
The ACS850 drive is designed for fast, cost effective installation and integration into cabinets. With the smallest module only 93 mm wide, side-by-side cabinet mounting is straightforward, leading to cabinets with shorter run lengths.
Reduced maintenance
Many features are implemented to enhance the reliability and durability of ACS850 drives:
- Maintenance assistant for preventive maintenance of the drive or its components
- Diagnostic assistant to help locate the cause of any disturbance to the drive and suggest remedies
- Coated boards, within the drive, for increased protection
A removable memory unit stores the complete drive settings, including all user settings and motor data. If the drive needs to be replaced or updated, it can be done quickly without any special tools or knowledge.
Ease of commissioning
ACS850 drives feature several macros which have preset, application specific parameter settings, enabling fast commissioning. Complementing the preset macros, the drive has an intelligent and intuitive startup assistant with a built-in help function to make parameter setting easy. In addition, there are several advanced functions such as short and long parameter menus, inputs and outputs mapping and changed parameters list. All these features are accessed via the easy to use control panel or PC tool.
Precise and reliable control
The performance and functionality of ACS850 drives are based on the motor control platform, direct torque control (DTC). DTC features:
- Dynamic torque and accurate speed control even without feedback
- Support for AC induction and permanent magnet motors as standard
- Good performance using enhanced motor identification at standstill
- Firmware option for ABB synchronous reluctance motors
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