Product Description

Control model 9905-144 is a speed control from Woodward’s 2301A series that is offered by AX Control; we buy, sell, repair, and refurbish this product. This control is a low voltage model, and forward-acting model. The setting of the actuator potentiometer for voltage is different on the forward acting control than it is on the reverse, the forward acting controls actuator voltage should be set ten percent higher than whatever the voltage for the rated speed was read at. In reference to the rated speed preliminary settings for this potentiometer should be set to the absolute minimum, this means the potentiometer will be sitting fully counterclockwise on your control. 

If using an SPM (speed and phase matching) synchronizer connect the wires to terminals twenty-five and twenty-six, the positive lead must be connected to terminal twenty-five and the negative lead must be connected to terminal twenty-six, then using shielded wire connect to terminal twenty-seven, it is important to note that under no circumstances should the shield ever be connected to the synchronizer. Note that the SPM synchronizer is not required for the control to function properly it is simply optional. 

Be advised that during the operation of the prime mover and control if an error occurs take caution and make an emergency shutdown of the prime mover, doing so prevents property damage and runaway of the prime mover. It is highly recommended that with the operation of the prime mover and control that there should be an external overspeed shutdown device to assist with the shutdown if the prime mover begins to overspeed, overspeeding of the prime mover can result in runaway and serious injury.