Description
Densan DVE‑440
Technical Specifications: Bus standard: VME bus Input signal: analog voltage, analog current ADC resolution: 16‑bit Isolation voltage: 1500 VAC between field and control bus Operating ambient temperature: 0 ℃ to 55 ℃ Storage temperature: -40 ℃ to 85 ℃ Relative humidity: 5%‑95% non‑condensing Mounting format: 6U VME plug‑in module Protection grade: IP20
Functional Features: Multi‑channel galvanically isolated analog input channels. 16‑bit high‑precision analog‑digital conversion. Programmable adjustment of each channel input range. On‑board low‑pass filter for restraining industrial electromagnetic noise. Front‑panel LED for power supply and fault indication. Hardware automatic self‑calibration function. VME interrupt output upon completion of sampling conversion. Complete power‑on self‑diagnosis mechanism.
Application Scenarios: Automated semiconductor equipment parameter monitoring, industrial test system analog signal collection, precision processing equipment process monitoring, laboratory automated pilot device control rack, factory special‑purpose automated machinery, new‑energy industry test stand control system.
Performance Parameters: Sampling rate configurable for each individual channel Full‑scale measurement accuracy: ±0.05% Vibration resistance: 10 Hz‑150 Hz, 0.5 g Shock resistance: 10 g peak acceleration, 11 ms duration MTBF value: 195000 hours
Material Composition: Front‑panel uses surface‑treated aluminum alloy. Main PCB substrate is FR‑4 glass‑fiber epoxy material. Backplane connector pins adopt gold‑plated copper alloy. Signal conditioning and conversion chips adopt industrial‑grade high‑precision components. Fastening parts are nickel‑plated steel.
Structural Features: Standard 6U VME plug‑in circuit board. Metal front panel equipped with locking pull‑handles and status LED indicators. Rear high‑density gold‑plated connector connects VME rack backplane. Circuit layout strictly separates analog signal area and digital logic area with isolation barrier. Analog signal trace adopts impedance‑controlled wiring design. Vent holes on front panel for passive heat dissipation.
Working Principle: Field analog signal enters signal conditioning circuit of the board. After filtering and galvanic isolation processing, signal transmits to analog‑digital conversion chip. ADC converts analog physical quantity signal into digital data. VME bus reads measurement data register and transmits data to VME single‑board computer. On‑board calibration circuit compensates measurement error caused by ambient temperature variation. Fault information can be read via VME bus register.
Installation Requirements: Insert module into target slot of 6U VME rack, fasten front‑panel locking screws. Maintain good ventilation heat‑dissipation condition inside control cabinet. Apply shielded twisted‑pair cable for all analog signal wiring. Analog signal cables must be separated from high‑voltage power cables. Cut off rack total power supply before plugging or removing this board. Perform static discharge operation before contacting circuit board surface.
Precautions for Use: Prohibit input of analog signal exceeding configured measuring range. Wear anti‑static wristband in all maintenance procedures. Keep ventilation openings free of dust accumulation. Do not install in environment containing corrosive gas. Conduct periodic hardware calibration according to equipment maintenance specification. Regularly inspect cable shielding grounding performance.
