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ProductSpecification

03312(Rev.E)

505DEDigitalControlSystem

forSingleValve,SingleExtraction/Admissionor

DualExtraction/AdmissionSteamTurbines

Application

The 505DE controller is designed to operate

industrial steam turbines of all sizes and

applications. This steam turbine controller

includes specifically designed algorithms and

logic to start, stop, control, and protect industrial

steam turbines driving generators or

compressors. The 505DE control’s unique PID

structure makes it ideal for applications where it

is required to control steam plant parameters

like turbine speed, load, and inlet, extraction, or

exhaust header pressures. This configurable

controller allows users to configure it for use on

single inlet turbines, single extraction turbines,

or double extraction turbines, making it ideal for

plants wanting to standardize on one product for

all their steam turbines.

The 505DE controller senses turbine speed via single or multiple, passive or active, speed

probes and controls the steam turbine and its related headers through one, two, three, or four

valve driver outputs connected to the turbine inlet and extraction steam valves. The control’s

special PID-to-PID logic allows stable control during normal turbine operation and bumpless

control mode transfers during plant upsets or on steam map limits, minimizing process over-

or undershoot conditions.

For critical applications requiring increased reliability and redundancy, users can select dual-

redundant control models, which have manual switch-over and automatic fail-over logic.

These redundant control models use proven redundancy manager algorithms to ensure

bumpless transfers and that system operation is not affected by single point failures. With a

dual-redundant configured 505DE control, the two CPU modules operate in a master/slave

manner, using synchronized memory to increase overall system availability. This configuration

allows for automatic and/or manual transfers between the two sets of modules in cases of

external I/O, internal module, or input power failures. Redundancy manager logic also allows

the configuration and selection of multiple input parameter signals via high-signal-select and

low-signal-select logic.

Description

The 505DE is built on Woodward’s field-proven MicroNet™ Plus platform, with integral

application software that is designed and user-configurable to control:

• Single valve steam turbines

• Split-range valve steam turbines

• Single extraction/admission steam turbines

• Double extraction/admission steam turbines

• Double extraction/admission steam turbines (with dual inlet valves)

The 505DE controller is available with an 8-Slot or 14-slot MicroNet chassis designed to be

bulkhead-mounted in a cabinet or control panel, and contains the required I/O and core

control software to control industrial steam turbines. Typically, this controller is located in an

enclosure that is rated for the site-specific environment

requirements. Field Termination

Modules (with integrated circuit fuse protection) are included with this controller to allow users

to easily land and manage turbine and system interface wiring. The control also supplies

source power for associated turbine sensors and I/O circuits.

• Field-configurable

for:

9 Single valve

turbines

9 Single extraction

/ admission

turbines

9 Double

extraction /

admission

turbines

• Simplex or dual

redundant models

• Integrated turbine

control and

protection

• Automatic

start/stop routines

• OEM qualified

algorithms

• Four ratio/limiter

de-coupling

modes

• Based on popular

505E control

• User-friendly

interface

• Ethernet or serial

com ports

• Optional 38 cm

(15”) touchscreen

HMI

• Easily interfaces to

plant DCS

1 2 3 4

Inhaltsverzeichnis

Seite 1 - 505DEDigitalControlSystem

ProductSpecification03312(Rev.E)505DEDigitalControlSystemforSingleValve,SingleExtraction/AdmissionorDualExtraction/AdmissionStea

Seite 2 - ControlFunctions

Woodward 03312 p.2 Depending on the application requirements, the 505DE control is available with a short (8-slot) or long (14-slot) chassis. The

Seite 3 - Redundancy

Woodward 03312 p.3 RedundancyThe 505DE system is capable of running in a redundant master / standby configuration to provide higher availability

Seite 4 - RegulatoryCompliance

Woodward 03312 p.4 SetpointNNSpeedSignalsHSSLSS505DEFunctionalDiagramAOAILoadSignalRemoteRaiseLowerAIPID+NSetpointRemoteRaiseLowerAIPID+AIInputCa

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