Product Description

Woodward’s 9900-432 control is a forward-acting 110 V control unit. The 2301 A control unit consists of a single circuit board housed in a sheet-metal frame; everything that is needed to be accessed to control the unit is accessible through the front of the frame. If voltage is lost when using this control the actuator will call for the actuator to use minimal fuel. The power of the control needs to be given from a  VDC unit that is 90-150 or a VAC unit of 88-132 or a 50/60 Hz source. 

Minimum fuel contact is designed as an alternative to a typical shutdown of the prime mover. Before the prime mover is started the speed signal of the control is absent. In prime movers that have cranking motors, the speed associated with cranking the mover is satisfactory to provide the signal meaning that overrides contact is not needed for starting. When the minimum fuel contact is not used a jumper must be connected between specifically terminal 17 and terminal 16 on low-voltage models; and between terminal 17 and terminal 0 on high-voltage models, the control will not function if the 24 VDC is not connected to terminal 17. 

The external speed trim on the 9900-432 control must be connected to terminal 23 and terminal 24 by way of a jumper unless the alternate method of remote speed trim potentiometer is being used. The wiring of the control must be made of shielded cable with twisted conductor pairings, these signal lines must be shielded to avoid picking up other signals from nearby equipment.