Secure Disable ( SD )

As a major Solutions Platform Unidrive SP has had to address not only all areas of control and communication but also safety. Invariably in modern control systems, some means has to be provided of preventing a drive from generating torque in a motor with a very high degree of integrity when the drive is in Standby or Stop mode. In most conventional systems this requirement is fulfilled by safety contactors, which are additional components and therefore add cost and increase space required in the cubicle. Unidrive SP overcomes this problem with its own integrated Secure Disable (SD) function. SD is suitable for incorporation into the safety system of a machine. It is also independent of the drive firmware; as such it meets the requirements of EN954-1 category 3 required for EC Machinery Directive.

The Unidrive SP range is dual rated and can operate in both normal and heavy duty regions and is available in the power range from 0.75kW to 30kW. In addition to its many system features the range offers the OEM true worldwide operation with an input voltage range from 200V to 690Vac, 50/60Hz. In control terms the drives offer market leading motor shaft performance and torque loop update times and ultra quiet and efficient operation with a switching frequency up to 16 kHz.

Phil Sewell adds The new product design cycle is done typically to gain 2-4 years advance on your rivals, and in so doing to leapfrog forward. When you start from the leading pack as we have with Unidrive, the leap forward is more pronounced, with the process more akin to evolution than radical revolution, and the result is more effective hence the benchmark.
Control Techniques have once again taken a giant leap forward in design concept and technology, placing us a product generation ahead of other Drives manufacturers