Description
Densan DVE‑R3900‑20A (9328)
Technical Specifications: Bus standard: VME ANSI/IEEE 1014 Mechanical format: 6U single‑slot VME plug‑in module Output type: electromagnetic relay dry‑contact output Relay contact rating: resistive load capacity per relay channel Galvanic isolation: full isolation between VME‑side logic circuit and relay contact‑side field circuit Operating temperature: 0 ℃‑55 ℃ Storage temperature: -40 ℃‑85 ℃ Relative humidity: 5%‑95% non‑condensing Protection grade: IP20 Backplane connector: DIN 41612 J1
Functional Features: Multi‑channel electromagnetic dry‑contact relay output. Complete galvanic isolation between control‑logic circuit and field contact circuit. Per‑channel front‑panel LED indicator reflecting relay pull‑in status. Relay‑contact surge‑suppression protection circuit. Power‑on hardware self‑diagnosis function. VME bus register‑based relay‑on‑off setting and status reading. Support VME bus interrupt output for relay‑state‑change event notification.
Application Scenarios: Semiconductor‑equipment safety‑interlock control cabinet, automated‑production‑line auxiliary‑equipment switching‑control, industrial‑machinery interlock‑signal output, automated‑test‑equipment VME‑based control rack, factory‑automation system remote‑switch control unit.
Performance Parameters: Relay contact mechanical life: rated number of operations under specified resistive‑load condition Vibration resistance: 10 Hz‑150 Hz, 0.5 g Shock resistance: 10 g peak acceleration, 11 ms pulse duration MTBF value: 176000 hours under standard cabinet operating environment
Material Composition: Front‑panel uses anti‑oxidation treated aluminum‑alloy material. Main printed‑circuit‑board adopts FR‑4 high‑Tg glass‑fiber epoxy substrate. Backplane‑connector pins apply gold‑plated copper‑alloy. Output components adopt industrial‑grade electromagnetic relay devices. Surge‑suppression and decoupling components are industrial‑specification electronic parts. Fastening hardware uses nickel‑plated steel.
Structural Features: 6U single‑slot VME plug‑in mechanical construction. Metal front panel fitted with locking ejector handles and per‑channel LED status lamps. Rear high‑density gold‑plated DIN connector mates with VME rack backplane. PCB layout strictly separates VME logic circuit area and relay‑contact field‑circuit area. Every relay channel is equipped with independent surge‑absorption component. Ventilation openings reserved on front panel for passive heat dissipation.
Working Principle: VME main controller writes relay‑control command value to DVE‑R3900‑20A hardware registers over VME backplane bus. On‑board logic circuit energizes corresponding relay coil, electromagnetic relay acts and dry‑contact contacts complete closing or opening action for field‑side loop. Surge‑suppression components absorb reverse electromotive force generated when relay coil de‑energizes. Front‑panel LED lamps directly reflect pull‑in status of each relay channel. Real‑time relay‑state information can be read from VME‑accessible hardware registers.
Installation Requirements: Insert DVE‑R3900‑20A module to designated slot of 6U VME rack chassis. Lock ejector handles and tighten front‑panel mounting screws. Ensure sufficient ventilation heat‑dissipation space inside control cabinet. For field‑side contact‑loop wiring, select cable specification matching actual load‑current magnitude. Separate field‑contact‑loop cables away from VME control‑system signal cables. Disconnect rack total power supply before inserting or removing this circuit board. Perform static‑discharge operation before touching bare printed‑circuit‑board surface.
Precautions for Use: Do not exceed rated voltage and current specification of relay dry‑contact terminals. Wear anti‑static wristband during maintenance and replacement operations. Keep ventilation openings free of dust accumulation. Avoid installation location with corrosive gas and oil mist. Periodically inspect relay contact aging condition and field‑wiring terminal tightness.
