Product Short Description
Product Name: Servo Position Controller (SPC)
Overview:
The Woodward 8200-226 is the latest model in Woodward’s SPC lineup, replacing 8200-224 and 8200-225. It precisely positions hydraulic or pneumatic actuators based on a demand signal received from a control system via DeviceNet, 4–20 mA, or both. Configuration and calibration are performed through a PC-based service tool.
Description
Technical Specifications:
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Power Input: 24 VDC nominal (18–32 VDC range)
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Typical Power Dissipation: 20 W
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Actuator Driver Output Current Ranges: ±10 mA, ±25 mA, ±50 mA, ±100 mA, ±250 mA
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Driver Output Resolution: 11 bits
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Driver Output Linearity: 0.2 % of full scale
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Analog Demand Input: 4–20 mA (fault detected below 1 mA or above 23 mA)
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Demand Input Resolution: 13 bits
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Demand Input Linearity: 0.1 % of full scale
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Monitor Output: 4–20 mA nominal, 12-bit resolution
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System Accuracy (DeviceNet): 0.25 % of full scale at 25 °C, TC < 150 ppm/°C
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System Accuracy (4–20 mA): 0.25 % of full scale at 25 °C, TC < 300 ppm/°C
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Transducer Compatibility: LVDT, RVDT, DC transducer
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Communications: DeviceNet, RS-232 service port (9-pin Sub-D)
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Shock Resistance: 30 g, 11 ms half-sine pulse
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Vibration Resistance: 0.7 g, 5–2000 Hz
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Operating Temperature: -40 °C to +70 °C
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Humidity: 95 % condensing
Key Features:
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High system accuracy (0.25 % FS) with low temperature coefficient
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Versatile I/O – supports single/dual feedback, ±10 mA to ±250 mA actuator currents
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Advanced diagnostics: driver current error, over-current, actuator open/short circuit, internal supply monitoring, memory test, A/D check, CPU power monitoring, DeviceNet communication fault detection
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Flexible communications via DeviceNet and RS-232
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Wide environmental tolerance (-40 to +70 °C)
Application Scenarios:
Precise positioning of hydraulic or pneumatic actuators in turbine control, valve actuation, and industrial automation systems requiring closed-loop position control.
Installation & Notes:
Use shielded cable for all analog and DeviceNet signals. Provide 24 VDC supply capable of delivering at least 20 W. Configure and calibrate via Woodward SPC Service Tool before commissioning. Ensure proper grounding to prevent EMI-induced faults.
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