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The 505 and 505XT are Woodward’s line of standard off-the-shelf controllers for operation and protection of industrial steam turbines. These user configurable steam turbine controllers include specifically designed screens, algorithms, and event recorders to simplify use in controlling industrial steam turbines or turbo-expanders, driving generators, compressors, pumps, or industrial fans.

Simple to use Simple to configure
Simple to troubleshoot
Simple to adjust (uses new OptiTune Technology)
Simple to connect (with Ethernet, CAN or Serial protocols)

The base 505 model is designed for simple single valve steam turbine applications where only basic turbine control, protection, and monitoring are required. The 505 controller’s integrated OCP (operator control panel), overspeed protection, and trip events recorder make it ideal for small steam turbine applications where overall system cost is a concern.

The 505XT model is designed for more complex single valve, single extraction or single admission steam turbine applications where more analog or discrete I/O (inputs and outputs) are required. Optional inputs and outputs can be connected to the 505XT controller via Woodward’s LinkNet-HT distributed I/O modules. When configured to control single extraction and/or admission based steam turbines, the 505XT controller’s field-proven ratio-limiter function ensures that interaction between the two controlled parameters (i.e., speed and extraction or inlet header and extraction) is correctly decoupled. By simply entering maximum levels and three points from the turbine’s steam map (operating envelope), the 505XT automatically calculates all PID-to-valve ratios and all turbine operation and protection limits.