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Product Specificatio

82021D 

2301A Speed

Control

APPLICATIONS 

The 2301A Speed Control controls thespeed or load of diesel or gas engines, orsteam or gas turbines.

The unit provides control in theisochronous mode, with droop availablethrough an externally wired potentiometer.The isochronous mode is used forconstant speed of the controlled primemover as long as it is able to providepower to satisfy the load.

The 2301A Speed Control is compatiblewith Woodward SPM-A synchronizers,load sensors, and other power generationcontrols. These controls can be added tothe system at any time, using the auxiliaryor SPM inputs to the 2301A SpeedControl.

The 2301A Speed Control is available forforward- or reverse-acting applications,and can be used with single or tandemactuators. High voltage models accept 88to 132 Vac or 90 to 150 Vac, and lowvoltage models accept 10 to 40 Vdc

supply for control power.

2301A Speed Controls are also availablewith 4–20 mA speed-setting input (seeproduct specification 02301).

Two Set SpeedsThe control has potentiometer-set LowIdle and Rated Speed settings which areselected with a switch.

DESCRIPTION

The 2301A Speed Control is housed in asheet-metal chassis and consists of asingle printed circuit board. Allpotentiometers are accessible from thefront of the chassis.

Speed range is set by an internal DIPswitch inside the aluminum cover of thecontrol. Speeds are based on thefrequency of a sensed gear (notnecessarily engine rpm).

Speed Trim A speed trim potentiometer or digitalreference unit may be connected to thecontrol to adjust prime-mover speed froma remote location.

Minimum Fuel A switch may be wired to the control tocall for minimum fuel to the prime mover.This contact is used for normal shutdown.

Failed Signal CircuitThe 2301A Speed Control constantlymonitors the signal from the magnetic

pickup. Should the signal be below aminimum threshold, the control sends aminimum-fuel signal to the actuator. Thiscircuit may be overridden while startingslow-cranking engines.

• Low- and high-voltage models

• Idle and ratedspeed settings

• Idle to rated speelinear ramp

•  Automatic start-fuel limiting

• Failed speedsensor detector

• EU DirectiveCompliant 

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SPECIAL FEATURES

Start Fuel Limit A special circuit in the control provides a limit to themaximum fuel setting while an engine is starting. Thisfeature helps limit exhaust smoke and engine damage.

Ramp Times Acceleration time from low idle to rated speed may beadjusted from 1 to 22 seconds. The ramp time fromrated to idle is always less than 1 second, regardless

of the setting of the ramp-time potentiometer.

Reset, Gain, Actuator CompensationThree adjustments are available to permit accurate,responsive engine control. The GAIN control adjustsresponse time to transient load changes. RESETadjusts the overshoot and undershoot which occurs inresponse to load swings. ACTUATORCOMPENSATION sets dynamic response time withina 0 to 500 millisecond range to match the timeconstant of the fuel system.

Power Supply

2301A Speed Controls accept either a high- or a low-voltage power source. The low-voltage model operateson 10 to 40 Vdc, and the high-voltage model operateson either 88 to 130 Vac or 90 to 150 Vdc.

SPECIFICATIONS

Speed Range A switch selects one of the following ranges (rating is based on frequency ofsensed gear, not engine rpm).500 to 1500 Hz 2000 to 6000 Hz1000 to 3000 Hz 4000 to 12 000 Hz

Speed Sensing 1 to 30 Vac. Maximum load is 1 kΩ at 1 kHz

External Speed Trim ±5% speed adjustment with 100 Ω potentiometerSignal to Actuator 0 to 200 mA, 30 to 45 Ω, standard

Temperature Limits –40 to +85 °C (–40 to +185 °F) operating temperature –55 to +105 °C (–67 to +221 °F) storage temperature

Humidity Limits 95% at 38 °C (100 °F)Vibration and Shock 4 Gs vibration between 5 and 500 Hz. 60 Gs shock

Steady State Speed Band ±0.25% of rated speed Auxiliary Input Allows load sharing accuracy of ±5% of rated load with speed settings

matched when using optional load sensing equipment

2301A Speed Control Outline Drawing(Do not use for construction)

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High Voltage Version Plant Wiring Diagram

Low Voltage Version Plant Wiring Diagram

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WoodwardIndustrial Controls

PO Box 1519Fort Collins CO, USA

80522-15191000 East Drake RoadFort Collins CO 80525Ph: +1 (970) 482-5811Fax: +1 (970) 498-3058

Distributors & ServiceWoodward has aninternational network ofdistributors and servicefacilities. For your nearestrepresentative, call theFort Collins plant or seethe Worldwide Directoryon our website. 

Corporate HeadquartersRockford IL, USAPh: +1 (815) 877-7441

www.woodward.com

This document is distributedfor informational purposesonly. It is not to be construedas creating or becoming partof any Woodward GovernorCompany contractual orwarranty obligation unlessexpressly stated in a writtensales contract.

 © Woodward Governor

Company, 1989All Rights Reserved

DECLARATION OF INCORPORATION

In accordance with the EMC Directive 89/336/EEC and its amendments, this controllingdevice, manufactured by the Woodward Governor Company, is applied solely as acomponent to be incorporated into an engine prime mover system. Woodward GovernorCompany declares that this controlling device complies with the requirements ofEN50081-2 and EN50082-2 when put into service per the installation and operatinginstructions outlined in the product manual.

NOTICE: This controlling device is intended to be put into service only upon incorporationinto an engine prime mover system that itself has met the requirements of the above

Directive and bears the CE mark.

For more information contact:

03/3/F