Description
Yokogawa PW482-11 DCS Power Supply Module
Technical Specifications Model: PW482-11 Input Voltage: 100~240VAC, 50/60Hz Output: Multi-channel regulated DC output for DCS backplane bus Mounting Form: Plug-in DCS rack module Operating Temperature: 0℃ ~ +60℃ Storage Temperature: -20℃ ~ +70℃ Relative Humidity: 10% ~ 90% non-condensing Protection Function: Overvoltage, overcurrent, overtemperature protection Module Indicator: Power OK LED, Fault LED
Functional Features Wide AC input voltage range adapts to industrial power grid fluctuation. Multiple groups of stable DC output for all modules on DCS rack. Supports redundant parallel operation for high availability control rack. Hot swap function allows module replacement without DCS system shutdown. Built-in self-diagnosis circuit continuously monitors internal hardware status. Power OK LED and fault LED provide visual state indication. Low ripple DC output eliminates power interference to high precision DCS signal acquisition. High power conversion efficiency reduces heat emission in control cabinet.
Application Scenarios Chemical plant continuous process DCS control station, oil and gas processing control rack, power plant auxiliary control system, pharmaceutical batch control DCS rack, water treatment large scale process control system.
Performance Parameters Output voltage remains stable within tolerance range when AC input fluctuates between 100VAC and 240VAC. Low voltage ripple under full rated load. Fast protection response upon overvoltage, overcurrent and overtemperature fault. Redundant parallel mode realizes bumpless power switchover during single module failure. Self-diagnosis reliably identifies internal power hardware fault. Module maintains stable power output during long-time continuous operation.
Material Composition Module housing: Black flame-retardant engineering plastic. Main PCB: FR4 multi-layer printed circuit board with conformal protective coating. Core electronic components: AC-DC switching power chip, high frequency transformer, rectifier diode, filter capacitor, power monitoring IC, protection circuit chip. Connector: Gold-plated edge connector for DCS rack backplane. Indicator: Light emitting diodes for power and fault state. Fasteners: Plastic positioning buckle.
Structural Features Rectangular plug-in module designed for Yokogawa DCS rack slot. Front panel equipped with power OK LED and fault LED indicators. Gold-plated edge connector at rear connects to rack backplane bus. Internal circuit separates high voltage AC input zone and low voltage DC output zone with isolation barrier. Ventilation holes on housing realize natural convection heat dissipation. Side positioning buckle ensures accurate insertion and locking.
Working Principle AC power enters module through DCS rack backplane connector. EMI filter suppresses power grid interference signal. High-frequency switching circuit converts AC power into isolated multi-channel DC voltage. Rectifier and filter circuit smooth DC output ripple. Voltage feedback circuit continuously samples output voltage and adjusts switching duty cycle to maintain stable output. Overvoltage, overcurrent and overtemperature monitoring circuit runs in real time. Once fault threshold is exceeded, protection circuit cuts off power conversion and triggers fault LED alarm. Two PW482-11 modules can run in redundant parallel mode, each module can independently bear full rack load, and seamless switch occurs when one module fails.
Installation Requirements Cut off rack main power before installing or removing PW482-11 module. Align module with empty DCS rack slot, push inward steadily until backplane connector fully inserts and buckle locks. Connect AC power cable to rack power terminal according to wiring diagram. Power on rack and verify LED indicator state. Install two PW482-11 modules in designated slots for redundant configuration. Reserve ventilation clearance around module to avoid heat accumulation. Carry out redundant switchover test in system commissioning stage.
Usage Precautions Module only works with matched Yokogawa CENTUM DCS rack. Cut off rack AC power before plugging or unplugging module. Do not exceed rated output power of module. Redundant power configuration is required for critical process control racks. Clean dust accumulated on ventilation holes periodically. Do not disassemble module housing without professional authorization, internal high voltage circuit exists. Replace module when continuous fault alarm appears.
