8200-1311 505XT digital controller for steam turbine

Product Description

Using a dual actuator configuration provides redundancy up to the actuator level. Typical redundant I/H (or I/P)
The system converts the 505XT actuator’s MA output into the corresponding hydraulic pressure (or gas) of the positioning servomechanism cylinder Pressure) Pressure. Both converters supply the appropriate pressure to position the steam valve according to the requirements of the controller. among One converter will control the valve position requirements and the other will be in standby mode. Selection between converter output signals Optionally, this can be done with a prism or solenoid delivery valve. The edge valve will select the higher pressure output of the two converters,
The solenoid transfer valve then selects a converter output and is based on the relay command from the 505XT controller in both Switch between converters. Either type of valve type can be used, see the Delivery Valves section for both Information on the respective advantages/disadvantages of valve types.
The converter state (I/H or I/P) and the pressure feedback signal should be programmed into 505XT as the converter between self Dynamic switching is provided and handled by the state of these signals. If desired, a relay output (with Set as a control relay) to switch between converter outputs. Automatic switching is based on programmed I/O (see Available I/O options). If a converter is programmed to fail Discrete input, then it is used for fault alarm and automatic switching. Properly installed valves allow in-line converter replacement.

8200-1312