Woodward High Output Digital Valve Positioner (DVP) DVP5000/DVP10000/DVP12000

The fan L10 life is rated at 30.000 hours @ 40C. To extend fan life, the DVP switches fan speed at

several internally sensed temperatures to provide optimum balance between cooling and fan life.

Woodward recommends fan assembly replacement every five years of operation.

The fan assembly orderable part number is 8926-1045SPR.

The following procedure is used to replace the fan assembly for the DVP; see Figure 2-5.

Place the actuator into a safe state.

Ensure that input power is removed from the driver.

Unscrew the 3 retention screws. Using the handle, remove the fan assembly from the DVP.

Place the new fan assembly into the connector; tighten the three retention screws.

Apply power to the DVP and ensure the fan alarms are off.

3.1 Power Supply Inputs

The DVP is designed with redundant power supply inputs. These inputs share a common ground and are

isolated from chassis ground. This option allows for redundancy in wiring, connectors, and power sources if

the power sources share a common ground. If one of the inputs is lost, drops low, or experiences temporary

power loss, the other power input will take over without being affected by the first input. The user is provided

four terminals—two plus and two minus. The DVP requires a power supply capable of the specified voltages

and current levels. Please see Table 3-1 for power and fusing information necessary for safe and reliable

operation of the DVP.

3.1.1. Inrush Limiting

The DVP has current inrush limiting built into the design. Power to the CPU occurs rapidly after power

application, but the internal bulk storage capacitors take about eight seconds to fully charge. Inverter

activation is prevented by software until the inrush time has expired. This inrush sequence occurs after

BOTH input power is applied AND EXTERNAL SHUTDOWN input is energized.

3.2 Power Wiring

3.2.1. Recommended Minimum Input Protection:

DVP5000: 15A time delay fuse or 15A breaker

DVP10000 and DVP12000: 30A time delay fuse or 35A breaker (Ambient temperature -40oC to +70oC)

DVP12000: 40A time delay fuse or 45A breaker (Ambient temperature -40oC to +55oC)

High input current transients can be drawn during rapid load movement. The above recommendations

include the transient nature of the electrically driven actuator system. The DVP is not equipped with an

input power switch or breaker. Correct sizing depends on factors such as cable sizing, environment, and

local regulatory requirements. It is recommended that a safety input power switch be provided for

installation and servicing.

Proper input power wiring to the DVP is crucial to its operation. A circuit breaker meeting the power

supply requirement may be used for this purpose. It is important that proper wiring be applied during

system installation to avoid an unwanted power trip or ground loop. Figure 3-1 illustrates the correct and

incorrect power cable wiring.

3.2.2 Recommendations for Dual and Simplex Power Wiring

The DVP is provided with power terminals suitable for the required voltage and current level. Two positive

and two negative pins are each sized for 8 AWG wire for the DVP5000 and DVP10000. The DVP12000

can accommodate up to 6 AWG wire.

Provision for separate redundant power supplies is provided by dual DC inputs. Each of the inputs is

diode isolated from the main input bus. If one of the supplies is lost, the other input will take over and the

DVP will continue to operate normally. The loss of the input will be annunciated as an alarm.

Woodward recommends that you take advantage of the dual input power wiring configuration; however,

the inputs can be tied together for use with a single power supply.

If a single power source is used to supply power to the DVP, jumpers should be used to apply power to

both sets of input power terminals. The purpose of these jumpers is to ensure that the power supplied

from the source is distributed equally to the two DVP inputs. This minimizes the power dissipated in each

of the DVP input diodes for reduced heat load and improved reliability. When using the jumpers, insert the

positive (+) power input lead from the power source into either the #1 or #3 positions, and the negative (-)

lead into either the #2 or #4 positions as shown in Figure 3-2a.

Some newer versions of the DVP may include power input plugs with jumpers to connect the two positive

and two negative terminals.

In installations where separate dual power sources are connected to the DVP, as shown in Figure 3-2b,

the jumpers are not required.