1. Overview
This power supply kit adopts standard Ovation cabinet mounting structure, perfectly matched with Ovation HART analog input modules and corresponding terminal bases. It converts cabinet internal working power into isolated regulated 24 VDC loop power supply, supplies power to two-wire HART field transmitters simultaneously, isolates instrument loop power and DCS internal control circuit to avoid mutual interference. Each kit passes factory load aging test, output voltage precision calibration and insulation withstand voltage test, guaranteeing stable power supply and reliable HART communication quality under long-cycle industrial continuous operation.
2. Core Functional Features
2.1 Regulated Isolated 24VDC Loop Output
Provides stable isolated 24 VDC power supply dedicated for two-wire HART smart transmitters; output voltage fluctuation is strictly controlled, ensuring the transmitter works within rated operating voltage range, no signal drift caused by voltage sag in long cable transmission.
2.2 Built-in Multi-layer Full Protection Circuits
Integrates output short-circuit automatic lockout, overcurrent limiting, reverse polarity wiring protection and transient surge absorption components. Field cable short circuit or miswiring only locks the corresponding power channel, will not affect other instrument loops and cabinet internal power supply; automatic recovery after fault removal.
2.3 Native HART Communication Compatibility
Power supply circuit reserves HART signal superimposing path, does not attenuate HART digital modulation signal on 4–20 mA current loop; Ovation system can realize remote transmitter parameter configuration, range modification, self-checking and fault diagnosis via HART protocol normally.
2.4 Rack Mounting & Compact Integrated Design
Integrated kit structure, directly installed inside Ovation standard control cabinet, occupies small cabinet space; wiring terminals are marked uniformly, one-to-one corresponding with HART AI module channels, convenient for on-site construction and later maintenance inspection.
2.5 Low Ripple & High Anti-interference Performance
Low ripple output circuit design, effectively suppresses cabinet fan, contactor switching coupled electromagnetic interference; isolation barrier cuts ground loop interference between field instrument side and DCS control room side, improves measurement signal stability.
2.6 Supports Hot Maintenance Matching HART I/O Modules
Cooperates with hot-swappable HART analog input electronic modules; power supply kit keeps powered on during module replacement, field transmitter does not power off temporarily, process loop maintains continuous control without disturbance.
2.7 Perfect System Compatibility
Exclusively matched with full series Ovation HART analog input modules and supporting terminal bases; no extra adapter or cabinet reconstruction required, applicable for new project cabinet assembly and old unit renovation spare part replacement.
3. Key Technical Specifications
Mounting Mode: Standard Ovation control cabinet internal fixed installation
Input Power: Derived from cabinet internal DC working power
Rated Output: Isolated stabilized 24 VDC loop power supply, dedicated for two-wire HART transmitters
Protection Functions: Short-circuit lockout, overcurrent limiting, reverse connection protection, surge suppression
Isolation Strength: Power input side and loop output side reinforced isolation
Operating Temperature: 0 ℃ ~ +60 ℃
Storage & Transportation Temperature: −40 ℃ ~ +85 ℃
Relative Humidity: ≤95% RH, non-condensing
EMC Compliance: Complies with industrial G3 anti-corrosion standard and power plant control cabinet anti-interference requirements
HART Compatibility: Fully conforms to HART protocol physical layer specification, no digital signal attenuation
4. Front Panel LED Indicator Definition
PWR (Green LED): Steady ON = kit input power normal; OFF = no input power or internal fuse blown
OUT OK (Green LED): Steady ON = 24 VDC loop output normal and loaded correctly
FAULT (Red LED): Lights up for output short circuit, overload or reverse wiring; fault state latched for maintenance confirmation
5. Application Scope
Thermal Power Industry
Supplies loop power for boiler drum level, steam pressure, feedwater flow, flue gas pressure HART smart transmitters in boiler/turbine/generator control cabinets, supporting remote parameter adjustment and instrument online diagnosis via HART bus.
Petrochemical Industry
Powers HART pressure, flow, liquid level transmitters on reactor, fractionator and process pipelines, realizing unified intelligent management of field instruments while ensuring stable closed-loop regulation of process parameters.
Metallurgy, Waste Incineration Power Plants & District Heating Stations
Provides reliable isolated loop power supply for all HART intelligent measurement instruments in control cabinets, guarantees uninterrupted operation of process control loops and intelligent instrument management functions of automation system.
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