Woodward 721 - Introduction to 721 Digital Speed Control; Application of 721 Digital Speed Control; 721 Control Accessories

Manual 26004 721DSC for Marine Propulsion Application
Woodward
1
Chapter 1.
General Information
Introduction
This manual describes the Woodward 721 Digital Speed Control , 9907-717. For details on
721 control hardware , refer to Woodward manual 02770 (721 Digital Speed Control
Hardware manual).
Application
This 721 Digital Speed Control was designed as a marine propulsion engine control to use
with a changeable pitch propeller control. This control has two sets of control dynamics
which the operator can switch to get most suitable engine operation: either when only the
propeller shaft is driven, or when both the propeller shaft and the generator are driven.
Normally, generators are operated in isolation. However this control has a load transfer mode
to enable parallel operation in order to transfer the load to another generator.
721 Control Accessories
A hand-held programmer, part number 9907-205, is used to adjust and monitor the 721 DSC.
The programmer plugs into serial port J1 (9-pin D connector).