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What Hengstler's SIL3 encoders should achieve for safe machines
At the top of the agenda in the development of new machines is functional safety. With the absolute encoders of the “Acuro” AD37, AD58, and AM34 series from Hengstler, manufacturers meet the highest requirements: These encoders are optionally available with SIL2 (PLd) and SIL3 (PLe). The “Acuro” AM34 also requires very little installation space, thus enabling the design of very compact drives.
High Functional Safety
Machines today are mostly modularly constructed so that they can be quickly adapted to changing production conditions. However, this setup is not compatible with traditional safety measures such as rigid safety fences. In order for these fences to be eliminated, the remaining components of a system must have the highest possible functional safety. The absolute encoders of the "Acuro" series AD37, AD58, and AM34 optimally meet this requirement, as they are optionally available with safety integrity levels SIL2 (PLd) and SIL3 (PLe) (according to EN ISO 13849).
The encoders themselves also exhibit high functional safety: They were specifically designed for use with ACURO link and are also executed redundantly, as the signals are synchronously transmitted over two separate channels. If one of the channels fails, the superior control accesses the second channel. An additional safety feature of the encoders is the diagnostic tools: They enable the control to safely continue operating the servo motor in the event of a transmission error.
Very High Speeds
The "Acuro" AD58S, in addition to Hengstler’s "Acuro-Link" interface, is equipped with Siemens’ "Drive-Cliq Interface". The optical absolute encoder is particularly suitable for demanding applications such as CNC machines and precision positioning systems with a resolution of 12…22 bit (ST), 12 bit (MT), and a speed of 10,000 rpm in continuous operation. With an absolute accuracy of ±35 arc seconds and a repeat accuracy of ±7 arc seconds, the "Acuro" AD37 is also predestined for highly dynamic, safety-critical motion control applications. Since the shaft of the encoder is not directly connected to the motor shaft as in conventional encoders, but via a coupling hub, the motor can be operated at very high speeds (12,000 rpm).
Translated automatically from German.
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