Woodward ProAct III, Инструкция по установке и эксплуатации

Страница: 21 / 32

Manual 04127 ProAct III/IV Actuator/Driver
Woodward 15
Where shielded cable is required, cut the cable to the desired length and prepare
the cable as instructed below.
1. Strip outer insulation from BOTH ENDS, exposing the braided or spiral
wrapped shield. DO NOT CUT THE SHIELD.
2. Using a sharp, pointed tool, carefully spread the strands of the shield.
3. Pull the inner conductor(s) out of the shield. If the shield is the braided type,
twist it to prevent fraying.
4. Remove 6 mm (1/4 inch) of insulation from the inner conductors.
The shield must be considered as a separate circuit when wiring the system. The
shield must be carried through connectors without interruption.
Installations with severe electromagnetic interference (EMI) may require
additional shielding precautions. Contact Woodward for more information.
Failure to provide shielding can produce future conditions which are difficult to
diagnose. Proper shielding at the time of installation is required to assure
satisfactory operation of the ProAct control system.
Power Supply
Power supply output must be low impedance (for example, directly from
batteries).
Run an insulated wire directly from the positive (+) battery terminal and negative
(–) battery terminal to the correct connection on the driver (see Figure 3-4). Run
a second insulated wire directly from the negative (–) terminal of the battery to
the driver. Neither of these connections needs to be shielded.
Run the power leads directly from the power source to the control. DO NOT
POWER OTHER DEVICES WITH LEADS COMMON TO THE CONTROL (see
Figure 3-4). For controls with MS type connector (controls and actuators),
connect the positive (line) to terminal J1-A and negative (common) to terminal
J1- D. For controls with conduit fittings and wires (controls and actuators),
connect the positive (line) to the gray/white wire. Connect the negative (–)
terminal to the gray wire. If the power source is a battery, be sure the system
includes an alternator or other battery-charging device.
When the engine is shut down, the driver powers the actuator into the minimum
stop. If the battery charging system is off when the engine is shut down, this will
cause the battery to be drained. In this case, the power to the ProAct must be
turned off with a switch or relay. Any such switch or relay must be interlocking to
prevent starting the engine when power to the actuator is shut off.
Do not remove power from the driver for normal shutdown
procedures. All actuator position commands should come from the
control unit, through the driver, to the actuator. Engine overspeed is
possible if power is removed from the driver while the engine is
running.
To prevent possible damage to the control, or poor control
performance resulting from ground loop problems, follow these
instructions.