9905-068C SPEED CONTROLLER MODULE BY Woodward

Description

9905-068C SPEED CONTROLLER MODULE BY Woodward

These controls are available for forward- or reverse-acting applications, and for use with either single or tandem actuators. 9905-068C for three different actuator current ranges are available, as well as a high-voltage model (90 to 150 Vdc or 88 to 132 Vac, 45 to 440 Hz), and a low-voltage model (20 to 40 Vdc). The high
voltage model is identified as such on the front; the low voltage model is not.In reverse-acting systems, the actuator calls for more fuel when the actuator voltage decreases. Complete loss of voltage to the actuator will drive the actuator to full fuel. This allows a backup mechanical ballhead governor to take control
rather than shut down the prime mover as would a direct-acting system. An optional deceleration ramp is also offered. When this option is present, 9905-068C to ramp from rated speed to idle speed is approximately 20 seconds. If this option is not present, this happens instantly.

9905-068C SPEED CONTROLLER MODULE BY Woodward

9905-068C SPEED CONTROLLER MODULE BY Woodward

The relationship between prime mover speed and sensor output frequency is expressed in the formula:Sensor Frequency in Hz equals the number of teeth on the speed sensing gear times the rated prime mover speed in revolutions per minute divided by 60.
Application engineers from Woodward or any of its authorized distributors or agents are always available to assist you in selection of the correct control for your system, or to answer 9905-068C concerning control installation, operation, or calibration. See Chapter 6 for contact information. The 2301A control requires a voltage source of 18 to 40 Vdc, 90 to 150 Vdc, or 88 to 132 Vac for operating power (15 W). If a battery is used for operating power, an alternator or other battery charging device is necessary to maintain a stable supply voltage.

9905-068C SPEED CONTROLLER MODULE BY Woodward

9905-068C SPEED CONTROLLER MODULE BY Woodward

All shielded cable must be twisted conductor pairs. Do not attempt to tin (solder) the braided shield. All signal lines should be shielded to prevent picking up stray signals from adjacent equipment. Connect the shields to the control terminals as shown in Figure 2-1 and in the plant wiring diagram (Figure 1-2). Wire exposed
beyond the shield should be as short as possible, not exceeding 50 mm (2 inches). The other end of the shields must be left open and insulated from any other conductor. Do not run shielded signal wires with other wires carrying large currents. See Woodward application note 50532, EMI Control for Electronic Governing Systems, for more 9905-068C.Where shielded cable is required, cut the cable to the desired length and prepare the cable as instructed below and shown in Figure 2-1.
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 inner conductor(s) out of the shield. If shield is the braided type, twist to prevent fraying.
4. Remove 6 mm (1/4 inch) of insulation from the inner conductor(s).
5. Connect wiring and shield as shown.In installations with severe electromagnetic interference (EMI), shielded wire run in conduit, double shielded wire, or other precautions may be required. Contact Woodward for more information.

9905-068C SPEED CONTROLLER MODULE BY Woodward

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