Description
The Moog C70902 is a high-performance Proportional-Integral (PI) Servo Amplifier card, specifically engineered for the precise control of hydraulic actuators. This module is widely utilized in industrial applications requiring high-dynamic accuracy, such as flight simulators, vibration testing tables, and heavy-duty industrial test stands. By processing analog command inputs and comparing them against transducer feedback (such as LVDTs or pressure sensors), the C70902 calculates the precise current required to drive Moog proportional or servo valves, effectively closing the loop on critical mechanical positioning.
Product Specifications
📍 Product Series: Moog C7000 Series (Analog Servo Controller)
⚖️ Weight: 0.55 kg
📏 Dimensions: Standard 3U Eurocard (100 mm x 160 mm)
🌍 Country of Origin: USA
⚡ Operating Voltage: ±15 V DC (Control) / 24 V DC (Power)
🔄 Control Strategy: Proportional-Integral (PI) Compensation
🛡️ Protection Class: IP20 (Requires cabinet mounting)
🌡️ Operating Temperature: 0°C to +50°C
🏗️ Mounting Type: DIN rail card rack / Eurocard cage
🔌 Interface: Gold-plated 32-pin DIN 41612 connector
Core Functionality
The C70902 functions by minimizing the “error signal”—the difference between the user-defined command and the actual physical position of the hydraulic cylinder. The Proportional (P) component provides immediate response to error, while the Integral (I) component ensures that any steady-state error is eliminated over time, providing “infinite” stiffness in the held position.
Recommended Models in the Same Series
🔍 C70903: Similar amplifier with additional derivative (PID) control for higher dampening.
🔍 C70902-R: Factory-refurbished certified unit.
🔍 G122-829: Digital alternative for the C7000 analog series.
🔍 C70902-S: Version with specialized conformal coating for moisture resistance.
🔍 Moog Valve Interface Box: Breakout module for testing signal integrity on C70902 cards.
🔍 C70904: Multi-channel controller version for dual-axis synchronization.
🔍 C70902-Spare-Connector: Replacement 32-pin mating connector for field maintenance.
🔍 C70902-Pot-Kit: External potentiometer adjustment kit for “on-the-fly” tuning.
🔍 Moog Servo Test Set: Portable diagnostic unit for verifying C70902 output signals.
🔍 C70900-Series-Rack: 19-inch mounting rack with integrated power supply for multiple modules.
Troubleshooting Maintenance When servicing this amplifier, it is critical to use a high-impedance oscilloscope to monitor the “Error” and “Drive” output test points. If you encounter oscillation in your hydraulic system, it is typically a result of the “Integral” gain being set too high, which can cause the control loop to become unstable.
