Manual 02879 723PLUS/Analog Load Sharing
Woodward 3
Discrete input voltages provide on/off command signals to the electronic control,
such as Raise Speed, Lower Speed, etc. Each discrete input requires 10 mA at
its 24 Vdc nominal voltage rating (2210 Ω load).
Other control options (on-board jumper configurations):
• proximity switch input for speed signal frequencies below 1000 Hz
• tandem actuator outputs
• 0–1 or 4–20 mA analog outputs
• 4–20 or 0–200 mA actuator outputs
Magnetic pickup inputs should only be used when operating speeds provide at
least 400 Hz magnetic pickup frequency.
723PLUS Digital Speed Control Accessories
PC-based Watch Window Software (part number 8923-932) and a Hand Held
Programmer (part number 9907-205) are used for monitoring and adjusting
software parameters of the 723PLUS control, including the software options.
They plug into communication port J1 of the control. [Hand Held Programmer
part number 9905-292 can also be used.] See Figures 1-3 and 1-4.
A kW feedback device such as the Woodward Real Power Sensor (RPS) or
commercial kW transducer can be used to provide the 723 control with a signal
representing generator load. The generator load signal is used for a variety of
automatic loading functions within the control. This signal is also required for
baseloading against the grid or load sharing with other units. Signal Input #1 has
been dedicated for this purpose.
An analog Speed and Phase Matching Synchronizer such as the Woodward
SPM-A can be used to allow automatic synchronizing of the engine generator.
Signal Input #2 has been dedicated to this purpose.
The two communication ports (J2 and J3) and the LON #1 data channel allow for
digital communications between external Modbus compatible devices, ServLink
devices, and Woodward LinkNet I/O modules. Port J2 is a dedicated port for
ServLink clients like Watch Window and Control View. The LON #1 channel has
been designated for use with up to 9 LinkNet modules. The inputs and outputs of
these modules can be read and controlled with Modbus compatible devices
connected to communication port J3. The number and types of LinkNet modules
available:
Total Module
Nodes Channels Network Part
Description Available Available Address Numbers
J Thermocouple In–Fail High OR 9905-966
J Thermocouple In–
Fail Low 4 24 1, 2, 3, or 4 9905-967
100 Ω Am RTD Input 1 6 5 9905-970
4–20 mA Input 1 6 6 9905-968
Discrete Input 1 16 7 9905-971
Relay Output 1 8 8 9905-973
4–20 mA Output 1 6 9 9905-972
TOTAL 9 66
Table 1-1. LinkNet Modules (Summary)
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