Description

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         All products on this website are special products, and market prices have been fluctuating,

　　The specific customer service quotation shall prevail, as the product is a new one and the traps are not real,

　　Please confirm the model, product, price, and other detailed information with customer service before placing an order. The website has been used,

　　The new one is for sale, please contact customer service to communicate.

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　　Woodward model 9905-144 is part of the 2301A Load Sharing and Speed Control Series. The unit is a forward-acting, low-voltage model with a low idle speed of fifty-five percent. There is an optional SPM synchronizer connection available.

9905-973 Other names:

Interface board 9905-973

9905-973 PCB module

Analog module 9905-973

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　　Product Description

Control model 9905-144 is a speed control from Woodward’s 2301A series. This control is a low-voltage and forward-acting model. The setting of the actuator potentiometer for voltage is different on the forward acting control than on the reverse; the forward acting controls actuator voltage should be set ten percent higher than whatever the voltage for the rated speed was read at. In reference to the rated speed, preliminary settings for this potentiometer should be set to the absolute minimum; this means the potentiometer will be sitting fully counterclockwise on your control.

If using an SPM (speed and phase matching) synchronizer, connect the wires to terminals twenty-five and twenty-six, the positive lead must be connected to terminal twenty-five, and the negative lead must be connected to terminal twenty-six, then using a shielded wire, connect to terminal twenty-seven. It is important to note that the shield should never be connected to the synchronizer. Please advise that the SPM synchronizer is not required for the 9905-144 control to function it is only optional.

Be advised that during the operation of the prime mover and the 9905-144 control, if an error occurs, take caution and make an emergency shutdown of the prime mover; doing so prevents property damage and runaway of the prime mover. It is highly recommended that with the operation of the prime mover and control, an external overspeed shutdown device should be used to assist with the shutdown if the prime mover begins to overspeed; overspeeding of the prime mover can result in a runaway and injury.

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　　Frequently Asked Questions about 9905-144

　　What are the elements needed alongside the 9905-144 control when operating a prime mover?

　　Other than the 9905-144, when operating a prime mover, a speed-sensing device, such as an MPU, is required, along with an external power source that operates on 10 to 40 VDC or 12 W, and a proportional actuator that will be used to position the steam- or fuel-metering device. All of these elements together allow for the attached prime mover to be controlled without any potential faults or errors occurring.

　　What is the difference between this model, which is forward acting compared, to a reverse-acting model such as 9905-146?

　　The main difference between forward-acting and reverse-acting models is that reverse-acting controls can operate additional Woodward models, such as EGB governors or actuators. Another main difference between the two systems is that reverse-acting systems require more fuel when the current on the actuator decreases; if a complete loss of signal occurs on the actuator, the actuator will automatically turn to full fuel. Due to limited information, it can be difficult to find out how the forward-acting models operate, although it should be fairly self-explanatory leading to the lack of information.

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　　Reviews For 9905-144

　　Model number 9905-144 was designed as a Full Authority Speed Control; it has the ability to control when used in isochronous mode and has a droop feature available through an externally wired potentiometer, making it an excellent purchase for those who wish to control speed control isochronously.

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        All products on this website are special products, and market prices have been fluctuating,

　　The specific customer service quotation shall prevail, as the product is a new one and the traps are not real,

　　Please confirm the model, product, price, and other detailed information with customer service before placing an order. The website has been used,

　　New for sale, please contact the website( https://www.weikunfadacai1.com/ )Customer service communication.

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1336-BDB-SP56C