中文版
Description
8405-094 ProAct™ II Electric Powered Actuator and Driver
Product Description
The ProAct II driver converts either a 0–200 mA, 4–20 mA, 4–13 mA, 11–20 mA, PWM, or a 0–5 V control signal from a Woodward electronic control into a specific actuator position. The driver provides a feedback of 0.5–4.5 V corresponding to actuator position.
The ProAct II driver comes in two different package configurations: a sealed aluminum box with conduit fittings for wiring, and a sheet metal box with grommet holes for wiring. The sealed box is IP56 capable and is designed for skid mounted applications. The sheet metal box is designed for skid or control box mounted applications in an additional enclosure for protection from the elements.
Both units have the same power supply requirements, vibration capability, and system response.
The ProAct II drivers require a separate electrical supply of 20–32 Vdc. The supply must be capable of providing a sustained 6 A and a peak 12 A for up to two seconds for the driver.
The ProAct actuator provides up to 5.4 J (4.0 ft-lbs) transient and 2.7 J (2.0 ft-lbs) steady state of work to move the fuel-setting lever on the engine. The actuators have position feedback.
Engine stability and response are set by the controlling device, not by the actuator and driver. Follow the instructions for the controlling device while setting up the engine control system.
The following configurations are available for the position command input.
8405-094
Product parameter
The driver box is designed to operate within an ambient temperature range of –40 to +70 °C (–40 to +158 °F).
The driver is capable of withstanding the following vibration specifications: Shock—US Mil Std 810C, M516.2, PL 40G, 11 ms sawtooth Vibration—Random Vibration 0.04 G²/Hz WGC RV2
If the application has a higher vibration level than specified (0.04 G²/Hz), vibration isolators must be used to keep the levels below the given levels.
Mount the driver in a location with space for adjustment and wiring access. Do not expose the driver to sources of radiant heat such as exhaust manifolds or turbochargers. Mount the driver close enough to the actuator and battery to meet the wire length requirements (see wiring requirements in Chapter 5).
The driver will generate some heat, so surfaces must be open to normal air movement. No special ventilation is required.
Ideally, the driver should be mounted flush to the metal side of a control cabinet, protected from the weather and high humidity, and close to the engine being controlled. Do not install the driver directly on the engine. The location should provide protection from high-voltage or high-current devices, or devices which produce electromagnetic interference. After initial adjustments are completed, access to the driver will not be required for normal engine operation.
Application field
Diesel Stops. Diesel installations will generally use the fuel system minimum and maximum position stops. Diesel engine racks are normally designed to provide the minimum and maximum stops without binding.
The actuator’s stops must not prevent the actuator from driving the fuel linkage to the minimum and maximum positions. The linkage should be designed to use as much actuator travel as possible, without preventing minimum and maximum fuel positions (see Figure 2-1).
Gas Engine Stops. Butterfly valves in carburetors will often bind if rotated too far toward minimum or maximum. For this reason, the stops in the actuator should be used at both minimum and maximum positions. Note that the stops will allow up to 3 degrees of additional rotation in both directions during impact (see Figure 2-2).
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