Control Options - Woodward 723PLUS Technical Manual

723PLUS Digital Marine Control
Outputs include:

Two 4–20 mA outputs which are set for: engine speed and rack position.

One 0–200 mA actuator output compatible with most Woodward actuators

One relay output for clutch permissive/close contact out

Two Alarm relay outputs: each is user-configurable for normally open/
closed contact output. There are status choices to choose among for these
two alarms.

Three serial ports. Port J1 is switchable to be a Watch Window PC interface
or a hand-held programmer port for monitoring and programming the
723PLUS control. Ports J2 and J3 are Watch Window only ports.
The 723PLUS control provides multiple functions including speed governing,
mechanical torque sharing, clutching/de-clutching control logic, speed matching
during clutching, and soft engine loading/unloading. Each engine requires a
723PLUS control along with the associated I/O connections, transducers, and
accessories (see Figure 1-2).
The 723PLUS control uses a master/slave relationship during clutching and
torque sharing operations. The master unit is the first unit to close its clutch. The
slave unit is the last unit to close its clutch. The primary function of the 723PLUS
control is speed control. Once the engines are clutched together, the primary
function becomes torque sharing, utilizing the master control's speed reference
for both engines. The engine clutching/torque sharing process, which begins with
closure of the Clutch Request discrete input, includes matching (synchronizing)
the engine speeds and then giving a clutch permissive command. Once clutched,
the engine is soft-loaded until the engines' torques are balanced. The engines
will maintain equal torques (torque sharing) during clutched operation. During a
de-clutching operation, the de-clutching engine is soft unloaded and, a de-clutch-
command is given when the engine is at the unload trip level. This is a simplified
description. For a more detailed description, see Chapter 3, Description of
Operation.
The 723PLUS control (Figure 1-1) consists of a single printed circuit board in a
sheet metal chassis. Connections are via three terminal strips and three 9-pin
subminiature D connectors. The 723PLUS control should be located in a
protected location. See Woodward manual 02877, 723PLUS Digital Control
Hardware, for installation details.
Each 723PLUS control requires 40 W of power. A nominal in-rush current of 7 A
is possible. Acceptable input voltage range is 18 to 40 Vdc.
Discrete input voltages provide on/off command signals to the electronic control,
such as Run/Stop, De-Clutch Request, etc. Each discrete input requires 10 mA
at its 24 Vdc nominal voltage rating (2210 W load).
Other control options (on-board jumper configurations):

Proximity switch input for speed signal frequencies below 400 Hz

0–1 or 4–20 mA analog outputs

4–20 or 0–200 mA actuator outputs
Magnetic pickup inputs should provide at least a 400 Hz frequency at minimum
operating speed.
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Control Options

Manual 26482
Woodward