Description
🚀 Engineered for precision industrial governor systems, the Woodward 9903-106 Motor Operated Potentiometer (MOP) provides remote speed adjustment capabilities. Rated for 115V / 60Hz / 5W / 1 RPM, this unit is fully compatible with Woodward 2301, 2301A, 2500, and Electrically Powered Governor (EPG) control series to enable seamless synchronization and speed trimming.
Technical Specifications & Datasheet
⚙️ Dimensions: 152 mm x 102 mm x 89 mm (6 in x 4 in x 3.5 in)
⚖️ Weight: Approximately 2.0 lbs (0.9 kg)
🌍 Country of Origin: United States
⚡ Power Consumption: 5 W nominal
🔌 Operating Voltage: 115 VAC at 60 Hz motor input
🌡️ Operating Temperature: -40°C to +70°C (-40°F to +158°F)
🛡️ Enclosure Rating: IP20 open-chassis panel mount
⏱️ Motor Speed: 1 RPM output shaft rotation rate
🔄 Resistance Value: Standard 10k ohm potentiometer tracking
🔌 Control Interface: Raise/Lower discrete signal inputs
Operating Procedures & Usage Methods
🛠️ Securely mount the MOP chassis inside a protected industrial control panel, ensuring adequate physical clearance for the internal motor and mechanical potentiometer gear assembly.
🔧 Wire the 115V / 60Hz power supply to the motor drive terminals and connect the internal potentiometer wiper and resistive leads directly to the speed trim inputs of your Woodward 2301, 2301A, 2500, or EPG governor.
📋 Apply momentary raise or lower contact signals to drive the internal motor, verifying smooth resistance changes across the potentiometer output to calibrate prime mover speed limits.
Power Sequencing Guidelines
🔌 Startup Sequence: Energize the main control panel power supplies, ensuring the 115V AC feed to the MOP is stable and ready to accept remote speed adjustment commands before starting the prime mover.
🛑 Shutdown Sequence: Lock out or de-energize the motor control circuit after the prime mover has reached a complete stop, preventing unintended potentiometer position shifts during maintenance.
Product Usage Instructions
📖 Utilize remote push-button switches wired to the raise and lower terminals to incrementally adjust the potentiometer wiper position, allowing fine-tuning of governor speed settings from a control desk.
📖 Periodically inspect the internal motor gears, mechanical linkages, and electrical wiper contacts for wear or dust accumulation to maintain precise motion control.
Frequently Asked Questions
💡 Q: What is the primary function of the 9903-106 MOP? A: It provides remote motorized speed setting adjustments (speed trimming) for compatible Woodward electronic governors.
💡 Q: What governor series are compatible with this unit? A: It is specifically designed for use with Woodward 2301, 2301A, 2500, and Electrically Powered Governor (EPG) control series.
💡 Q: What are the electrical and mechanical ratings of the motor? A: The motor is rated for 115 VAC, 60 Hz, consuming 5 W of power, with an output shaft speed of 1 RPM.
Recommended Woodward Series & Industrial Models
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