Product Short Description
Product Brief Introduction
This is the core backplane power supply unit for DeltaV standard I/O chassis, converting industrial AC input into isolated dual low-voltage DC rails to power controller cards, I/O terminal blocks and communication bus circuits. It provides redundant power support capability, built-in overvoltage, overcurrent and short-circuit self-protection, compliant with industrial safety standards for continuous 24/7 process operation.
Description
Technical Specifications & Performance Parameters
- Input Power Range: 85 VAC ~ 264 VAC universal single-phase AC
- Output Channels: Dual independent isolated DC outputs
- Main Output: 24 VDC ±1 %, maximum 12 A total chassis load
- Auxiliary Logic Output: 12 VDC ±0.5 %, 3 A for communication backplane
- Conversion Efficiency: ≥ 89 % under rated full load
- Operating Ambient Temperature: 0 °C ~ +60 °C; derate 10 % load above +50 °C
- Storage Temperature: -40 °C ~ +85 °C
- Electromagnetic Isolation: 2500 VAC isolation between AC input and DC output sides
- Protection Mechanisms: Input surge protection, output short-circuit auto-shutdown, overvoltage latch protection, over-temperature thermal cut-off
- Status Indication: Front panel LED for Power OK, Fault, Overload alarm
- Physical Dimensions: 178 mm (H) × 114 mm (D) × 44 mm (W)
- Net Weight: 0.7 kg
Material & Structural Features
- Outer Housing: Flame-retardant black ABS industrial plastic, UL94 V-0 fire resistance rating
- Internal PCB: Double-sided heavy copper printed circuit board, tin-plated corrosion-resistant copper traces
- Heat Dissipation: Built-in vertical aluminum heat sink with side ventilation grille airflow channels
- Mechanical Lock: Rotating cam lock mechanism to secure module to chassis backplane, anti-vibration locking
- Backplane Connector: Gold-plated multi-pin spring contact connector for stable power transmission
Working Principle
AC mains voltage enters the front-end EMI filter circuit to suppress grid harmonic interference, then passes to high-frequency DC-DC switching converter topology. The converter generates stabilized 24VDC and 12VDC isolated power rails. Built-in feedback control loop continuously monitors output voltage and current; triggers automatic protection shutdown when abnormal electrical parameters are detected, with fault status signal transmitted to DeltaV controller via backplane communication bus.
Application Scenarios
- Central power supply for DeltaV standard 8-slot / 16-slot I/O chassis
- Continuous process industries: Oil & gas refining, chemical manufacturing, power generation, pulp & paper, pharmaceutical batch control
- Mixed analog/digital I/O control panels with redundant power architecture
Installation Requirements
- Mount on standard DeltaV I/O chassis backplane, supports hot-swap replacement without system shutdown
- Maintain minimum 20mm vertical ventilation gap between adjacent power modules for heat dissipation
- AC input wiring must use dedicated industrial terminal cable with ground wire connection to panel protective earth
- Install in indoor control cabinet only; avoid direct sunlight, water splash and high dust concentration environments
Usage Precautions
- Do not connect DC power sources to AC input terminals; reverse polarity will permanently damage internal switching components
- Total chassis I/O load must not exceed 12A rated output current; add redundant KJ1501X1-BC1 for high-load chassis
- Clean ventilation grilles every 12 months to remove accumulated dust blocking heat dissipation
- If fault LED activates, cut off AC input power for 5 minutes before re-powering to reset protection latch
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