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Summary of Contents for Woodward Digital Reference Units
- Page 1 Installation and Operation Manual Digital Reference Unit with high, low, and intermediate setpoints Manual 82006 (Revision A)
- Page 2 Revisions—Text changes are indicated by a black line alongside the text. Woodward Governor Company reserves the right to update any portion of this publication at any time. Information provided by Woodward Governor Company is believed to be correct and reliable. However, no responsibility is assumed by Woodward Governor Company unless otherwise expressly undertaken.
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Page 3: Table Of Contents
Contents ..........LECTROSTATIC ISCHARGE WARENESS 1. G ............1 HAPTER ENERAL NFORMATION Introduction......................1 Digital Reference Units...................1 Applications ......................1 2. I ..........3 HAPTER NSTALLATION AND DJUSTMENT Introduction......................3 Unpacking and Inspection ..................3 Location Considerations..................3 Setting the Output Limits ..................3 Setting Ramp Rates ....................5 Plant Wiring ......................5... -
Page 4: Electrostatic Discharge Awareness
PCB from the control cabinet, place it in the antistatic protective bag. CAUTION—ELECTROSTATIC DISCHARGE To prevent damage to electronic components caused by improper handling, read and observe the precautions in Woodward manual 82715, Guide for Handling and Protection of Electronic Controls, Printed Circuit Boards, and Modules. Woodward... -
Page 5: Chapter 1. General Information
Woodward Digital Reference Unit with three set points. Digital Reference Units Digital Reference Units use a precise linear ramp to provide a 0 to 8 volt reference signal to the attached control. The reference unit can be used with a speed or load control or a Process and Import/Export control. -
Page 6: Figure 1-1. Digital Reference Unit Block Diagram
Digital Reference Unit Manual 82006 Figure 1-1. Digital Reference Unit Block Diagram Woodward... -
Page 7: Chapter 2. Installation And Adjustment
Limit (Range), it is necessary to always set the Low Limit first and to reset the Range (High Limit) after any change in the Low Limit. The following step-by-step procedure should be followed any time the limits are set or reset. Woodward... - Page 8 When selecting two inputs at the same time, Set Point has priority over the Raise, and Lower has priority over the Set Point. If Raise is permanently closed, the unit will automatically go to the High Limit when neither Lower nor Set Point switches are closed. Woodward...
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Page 9: Setting Ramp Rates
The ramp will stop should a selection be opened before the limit or set point has been reached. When Set Point is selected, the output will ramp up or down as necessary to reach the predetermined set point. Woodward... -
Page 10: Relays
Digital Reference Unit Manual 82006 Relays Some Digital Reference Units are equipped with three relays for use by the system operator. The relay contacts are 5 A resistive at 30 Vdc, or 2 A resistive at 115 Vac. External Reference... -
Page 11: Figure 3-1. Plant Wiring Diagram And Outline Drawing
Manual 82006 Digital Reference Unit Figure 3-1. Plant Wiring Diagram and Outline Drawing Woodward... -
Page 12: Chapter 3. Applications
Chapter 3. Applications The wiring diagrams in Figure 4-1 show some of the methods used to connect the reference unit to various electronic speed/load controls. Use of the unit is not limited to the installations shown. Figure 4-1. Wiring Applications Woodward... -
Page 13: Figure 4-2. Wiring Diagrams
Manual 82006 Digital Reference Unit Figure 4-2. Wiring Diagrams Woodward... -
Page 14: Chapter 4. Service Options
Product Service Options The following factory options are available for servicing Woodward equipment, based on the standard Woodward Product and Service Warranty (5-01-1205) that is in effect at the time the product is purchased from Woodward or the service is performed: •... -
Page 15: Returning Equipment For Repair
Returning Equipment for Repair If a control (or any part of an electronic control) is to be returned to Woodward for repair, please contact Woodward in advance to obtain a Return Authorization Number. When shipping the item(s), attach a tag with the following information: •... -
Page 16: Replacement Parts
To expedite the repair process, contact Woodward in advance to obtain a Return Authorization Number, and arrange for issue of a purchase order for the item(s) to be repaired. No work can be started until a purchase order is received. -
Page 17: Engineering Services
Manual 82006 Digital Reference Unit Engineering Services Woodward Industrial Controls Engineering Services offers the following after- sales support for Woodward products. For these services, you can contact us by telephone, by email, or through the Woodward website. • Technical Support •... -
Page 18: Technical Assistance
Type of Fuel (gas, gaseous, steam, etc) Rating Application Control/Governor Information Please list all Woodward governors, actuators, and electronic controls in your system: Woodward Part Number and Revision Letter Control Description or Governor Type Serial Number Woodward Part Number and Revision Letter... - Page 20 Phone +1 (970) 482-5811 • Fax +1 (970) 498-3058 Email and Website—www.woodward.com Woodward has company-owned plants, subsidiaries, and branches, as well as authorized distributors and other authorized service and sales facilities throughout the world. Complete address / phone / fax / email information for all locations is available on our website.
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