MOOG CZ1008DVA

Technical Specifications

• Mounting Standard: 19-inch standard rack single-width plug-in module
• Overall Dimensions (W × H × D): 30.5 mm × 133 mm × 160 mm
• Net Module Weight: 0.45 kg
• Control Power Supply Input: 24 V DC ±5%
• Maximum Continuous Output Drive Current: ±800 mA bipolar servo valve coil drive
• Output Current Resolution: 0.1 mA digital adjustment step
• Command Input Signal Ranges: ±10 V DC analog external position command
• Feedback Signal Supported: LVDT differential spool position feedback sensor
• LVDT Excitation Output: 7 V AC, 4 kHz sinusoidal excitation signal
• Closed-Loop Control Algorithm: Digital PID with integral windup anti-saturation logic
• Analog Monitor Output: ±10 V DC proportional to actual valve spool position
• Onboard Fault Detection Functions: Overcurrent, LVDT feedback loss, power undervoltage
• Galvanic Isolation Rating: 1000 V DC between field hydraulic sensor circuits and rack backplane power
• Operating Ambient Temperature: -10 °C to +60 °C
• Storage Temperature Band: -40 °C to +80 °C
• Relative Humidity Operating Range: 5%–95% RH, non-condensing
• Compliance Standards: CE industrial EMC, aerospace test equipment environmental standards

Function Features

1. Dedicated LVDT excitation and signal conditioning circuit for direct MOOG servo valve spool position feedback acquisition
2. Digital PID closed-loop control with adjustable proportional, integral, derivative gain parameters via front panel potentiometers
3. Anti-integral windup protection prevents valve saturation and slow response during large position step commands
4. Bipolar ±800 mA high-precision current output directly drives two-stage electro-hydraulic servo valve coils
5. Independent analog monitor output provides real-time spool position signal to external data acquisition equipment
6. Hardware fault detection circuit triggers open-collector alarm output upon feedback disconnection or drive overcurrent
7. Front panel adjustment potentiometers for zero offset calibration, loop gain tuning and dead zone compensation
8. Low-drift signal conditioning circuit maintains stable control precision under wide industrial temperature fluctuation

Performance Parameters

• Closed-loop control bandwidth: 600 Hz full-scale response
• Output current temperature drift: ≤ ±0.05 mA per 10 °C ambient change
• LVDT feedback signal sampling refresh cycle: 50 μs
• Zero offset adjust range: ±5% full output current
• Dead zone compensation adjustment range: 0–15% output current
• Fault alarm response latency: < 100 μs upon abnormal signal detection
• Command input impedance: 100 kΩ differential input resistance

Material Composition

• Front panel: Black flame-retardant ABS plastic with printed calibration legend and adjustment potentiometers
• Module frame: Thin aluminum alloy extrusion with black oxidation anti-corrosion treatment
• Main circuit board: Multi-layer FR4 high-temperature industrial PCB with precision operational amplifiers
• Output drive components: Low-drift power operational amplifiers, current sampling precision resistors
• Rack edge connector: Gold-plated copper alloy contact pins for long-term plug reliability
• Potentiometer components: Industrial wire-wound precision adjustment resistors with anti-vibration locking nuts

Structural Characteristics

• Single-width horizontal plug-in structure compatible with standard 19-inch industrial rack backplane
• Front panel integrated three adjustment potentiometers, power status LED and fault alarm LED indicators
• Rear rack edge connector integrates all power supply, command input, LVDT feedback, valve drive and alarm output wiring
• Internal metal shielding partition separates high-current valve drive circuit and low-level LVDT weak signal circuit
• Passive thin aluminum heat spreader bonded to power drive circuit area for heat dissipation
• IP30 front panel protection rating, IP20 rear rack connector zone
• Side metal extraction tabs for easy module removal from energized rack during scheduled maintenance

Working Principle

1. Regulated 24 V DC rack power supplies internal isolated power conversion circuits for analog signal conditioning and power drive stages
2. Onboard 4 kHz AC excitation circuit outputs sinusoidal signal to servo valve built-in LVDT spool position sensor
3. LVDT differential feedback voltage signal enters precision conditioning circuit, converted to digital spool position value for closed-loop comparison
4. External ±10 V position command signal is sampled and compared with measured spool feedback value to generate position error signal
5. Digital PID arithmetic unit processes error signal with user-tuned gain parameters, outputs correction signal to bipolar current drive stage
6. Power drive circuit converts correction signal into precise ±800 mA proportional bipolar current to adjust servo valve coil electromagnetic force, changing spool displacement
7. Real-time current sampling circuit monitors valve coil drive current; triggers external fault alarm output and limits drive current when overcurrent or feedback loss occurs
8. Analog monitoring output circuit converts real-time spool position value into standard ±10 V signal for upper control system data recording

Advantage Highlights

1. Integrated LVDT excitation and feedback conditioning circuit eliminates external signal processing auxiliary hardware for servo valve control
2. Ultra-low temperature drift current output maintains consistent hydraulic positioning accuracy across wide operating temperature band
3. Built-in anti-integral windup logic eliminates valve lag during large rapid position adjustment cycles
4. Standard ±10 V analog command and monitor interface achieves seamless compatibility with industrial PLC and data acquisition systems
5. 1000 V DC galvanic isolation suppresses ground loop noise common on multi-hydraulic station test benches
6. Front panel accessible manual calibration potentiometers simplify on-site hydraulic loop gain and zero offset tuning
7. Compact single-width 19-inch rack design minimizes total rack space occupation for multi-axis hydraulic test equipment

Applicable Industries

Installation Requirements

1. Horizontally insert module into standard 19-inch rack single-width slot, fully seat rear gold-plated edge connector with backplane bus
2. Reserve minimum 20 mm vertical air gap between adjacent rack modules for passive heat dissipation
3. Cabinet cooling air flow rate minimum 0.4 m/s to restrict internal power drive circuit temperature rise
4. Separate low-level LVDT feedback shielded cables and high-current servo valve drive cables into independent cable trays with 10 cm minimum separation
5. Connect rack backplane protective earth busbar to hydraulic station central grounding grid with dedicated copper conductor
6. Prohibit installation in cabinet compartments with hydraulic oil mist or condensing high humidity atmosphere
7. Adjust front panel PID gain potentiometers only after full hydraulic circuit flushing and valve mechanical zero calibration

Usage Notes

1. Complete LVDT zero offset calibration via front potentiometer immediately after servo valve hydraulic fluid filling and pressure stabilization
2. Avoid continuous operation above +55 °C ambient temperature to prevent drift of precision current output stage
3. LVDT feedback wiring must use dedicated shielded twisted pair cable with shielding grounded only at amplifier module rear connector
4. Do not hot-swap module during high-pressure hydraulic test cycle to avoid sudden servo valve spool displacement shock load
5. Inspect rack backplane gold-plated edge connectors for oxidation every 12 months of continuous operation
6. Prevent hydraulic oil mist ingress into front panel potentiometer adjustment slots to avoid conductive contamination and signal drift
7. Replace internal precision sampling resistors when output current deviation exceeds factory calibration tolerance after long-term operation