Manual 04176
ProAct II Actuator/Driver
Woodward
21
Chapter 5.
Technical Specifications
Power Supply
The power supply for the ProAct II driver is configured to operate from 20 to 32
Vdc. The minimum current level to be provided by the system will be 6 A dc and
12 A dc for up to two seconds.
Actuator Position Feedback
The actuator position feedback output provides a nominal 0.5 to 4.5 Vdc
corresponding to 0% to 100% actuator travel. The actuator position feedback will
filter the position output signal using a low-pass filter with a cut-off frequency of
40 Hz. The actuator position output has gain and offset adjustments to trim the
voltage output for the proper voltages at the correct positions.
System Wiring
The actuator driver is capable of driving the actuator through wiring harnesses of
the following configurations:
The maximum length of the line distance between the battery summed with twice
the distance between the control and the actuator must be less than the distance
in the following chart.
Line Length
Driver Wire Gauge
Actuator Position
Feedback Wire Gauge
Actuator Position
Feedback Wire Type
0–3 m
(0–10 ft)
1.5 mm² (16 AWG) or
larger stranded
0.5 mm² (20 AWG) or
larger stranded
twisted shielded triple
3–6 m
(10–20 ft)
2 mm² (14 AWG) or
larger stranded
0.5 mm² (20 AWG) or
larger stranded
twisted shielded triple
6–10.5 m
(20–35 ft)
4 mm² (12 AWG) or
larger stranded
0.5 mm² (20 AWG) or
larger stranded
twisted shielded triple
10.5–16.8 m
(35–55 ft)
6 mm² (10 AWG) or
larger stranded
0.5 mm² (20 AWG) or
larger stranded
twisted shielded triple
Under no circumstances should the maximum length calculated using the
formula above be greater than 16.8 m (55 ft).
In applications where these maximum line lengths are followed, the worst case
transient current level at elevated actuator temps (100 ºC ambient) will be 57.5%
of the transient limit. This only affects the transient current limits, the steady state
limits will still be 6 A.
