WOODWARD 5501-471 Servo speed governor

This instruction explains the IMDSO14 digital output module specifications and operation. It details the procedures necessary to complete setup, installation, maintenance, troubleshooting and replacement of the IMDSO14 digital output module.When an update is received, insert the latest changed pages and dispose of the superseded pages. NOTE: On an update page, the changed text or table is indicated by a vertical bar in the outer margin of the page adjacent to the changed area. A changed figure is indicated by a vertical bar in the outer margin next to the figure caption. The date the update was prepared will appear beside the page number Equipment Environment All components, whether in transportation, operation or storage, must be in a noncorrosive environment. Electrical Shock Hazard During Maintenance Disconnect power or take precautions to insure that contact with energized parts is avoided when servicing.

SPECIFIC WARNINGS

 Disconnect power before installing dipshunts on the MMU backplane. Failure to do so will result in contact with cabinet areas that could cause severe or fatal shock. (p. 3-5, 5-3) Disable the output signals before removing the module to prevent damage to the edge connector pins. (p. 5-2) Never clean electrical parts or components with live power present. Doing so exposes you to an electrical shock hazard. (p. 6-2) Wear eye protection whenever working with cleaning solvents. When removing solvents from printed circuit boards using compressed air, injury to the eyes could result from splashing solvent as it is removed from the printed circuit board. (p. 6-2) There are exposed AC and DC connections inside the cabinet. These exposed electrical connections present a shock hazard that can cause injury or death. (p. 6-4)If input or output circuits are a shock hazard after disconnecting system power at the power entry panel, then the door of the cabinet containing these externally powered circuits must be marked with a warning stating that multiple power sources exist.

OVERVIEW 

The IMDSO14 Digital Output module (DSO) outputs 16 digital signals from the INFI 90 OPEN system to control a process. It is an interface between the process and the INFI 90 OPEN Strategic Process Management System. The signals provide digital switching (ON or OFF) for field devices. Control modules perform the control functions; I/O modules provide the input/ output functions. Figure 1-1 illustrates the INFI 90 OPEN communication levels and the position of the digital output modules within these levels.

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