Description

The actuators are designed to be base- or flange-mounted (Model IV is base

mounted only) in an on-engine environment and can therefore withstand high levels

of vibration and temperature extremes. They all have a 0.625-36 serrated tooth

terminal shaft, and an optional rotation scale and indicator are available for visible

travel detection. The actuators accept analog or PWM position command signals. In

addition, the Digital Plus driver accepts CAN position command signals and can be

configured for redundant command signals. It monitors all available internal and

external signals, and annunciates any detected faults through a discrete output. An

analog output provides actual position indication, and a discrete input is available to

remotely shut down the actuator.

Additional features of the Digital Plus driver include on-line and off-line diagnostics,

current limiting based on driver electronics temperature, CAN communications, and

service port communications. The Digital Plus driver is field programmable, allowing

a single design to be used in many different applications. It must be configured and

calibrated to the specific engine with a personal computer (PC) and a Woodward

Watch Window Service Tool that communicates serially to the driver via RS-232

using Woodward’s DDE ServLink protocol.