Hydac HY-TTC 500 safety hydraulic systems controller

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The HY-TTC 500 product family is an electronic control solution designed to satisfy upcoming needs for a wide range of hydraulic applications.

The freely programmable controllers with a dual-core ARM Cortex-R4 lockstep processor are protected by a compact, automotive-style housing suited to harsh environments. The controllers fulfil safety requirements up to SIL 2 (IEC 61508)/PL d (ISO 13849) and can be programmed either in C or in CODESYS. The safety certified CODESYS Safety SIL 2 speeds up application validation significantly.

The extensive I/O set with various configuration options makes the HY-TTC 500 controllers suitable for a wide range of applications: for example, a group of eight I/O pins can be individually configured for use as voltage output, digital output or analog input. Another use case is to build up a centralised architecture using one HY-TTC 500 controller for the whole machine. Commissioning time can be improved by using ethernet for download and debugging purposes.

The majority of run-time tests that are needed to achieve the diagnostic coverage required for SIL 2/PL d are performed in hardware by the dual-core lockstep CPU and its safety companion. Therefore, almost the full processor power is available for the application. The available memory protection mechanisms allow the execution of safety and non-safety software on the same ECU without interference. The time-consuming validation of non-safe software is therefore no longer necessary. Safe data communication is achieved by the standardised CANopen Safety protocol. In case of safety-relevant failure, outputs can be shut off in three groups allowing ‘limp-home’ functionality.

HY-TTC 500 will be available in two variants, the HY-TTC 540 and HY-TTC 580, with different I/O sets and interfaces to meet the different requirements of the OEMs.