Woodward PWM Input for Position Demand

Electrical Connections

Swift Valve

The interface for the Swift is a circular 24-pin sealed connector. All I/O points on

this connector are wired to the Swift Driver. Refer to Chapter 3 for details on

Swift valve wiring.

Swift Driver

The interface for the Swift Driver is a 48-pin PCB-mounted sealed automotive

style receptacle, which protrudes through the driver enclosure. Wiring harness

mating is accomplished using two separate plugs, one 30-pin (J1) and an 18-pin

(J2). Refer to Chapter 3 for details on Swift Driver wiring.

Swift Valve Inputs/Outputs (I/O)

The following Inputs/Outputs (I/O) are available in the Swift Valve:

 driver stepper motor inputs (2)

Driver Stepper Motor Inputs

Each driver channel has stepper motor inputs for connection to the Swift Driver.

Driver Inputs/ Outputs (I/O)

The following Inputs/Outputs (I/O) are available in the Swift Driver:

  power input

 2 analog inputs; one per valve channel (optional)

 2 PWM inputs; one per valve channel (optional)

 1 discrete input

 1 discrete output

 1 RS-232 communications port

 1 CAN (Controller Area Network)/DeviceNet port

Power Input

The input power has an operational range of 21.5—28 Vdc, nominal 24 Vdc.

Input power out-of-range diagnostics are provided.

Analog Input for Position Demand

The analog inputs are nominally 4–20 mA (25 mA range). Range and failure

diagnostics are provided based on software configuration and settings.

PWM Input for Position Demand

The PWM input accepts a 500 to 2000 Hz input signal of 5 to 26 volts peak-to

peak voltage (referenced to unit battery ground), and each channel is

independently jumper-configurable to accept push-pull or open-collector PWM

signals. The PWM input duty cycle minimum and maximum fields are adjustable

to match the controller sending the demand. Range and failure diagnostics are

provided based on software configuration and settings.