Rolls-Royce 5880-PC1025

3. Technical Specifications

• Official Part Number: 5880-PC1025
• Rated Input Signal: AC sine wave signal from magnetic speed sensor, input amplitude range 20 mV ~ 2.5 VAC, input frequency 10 Hz ~ 12 kHz corresponding to full engine rated rotating speed scope
• Main Power Supply Requirement: Dual DC input: +24 VDC ±10% (0.35A Max); -24 VDC ±10% (0.12A Max); auxiliary 5VDC reference power embedded on-board
• Standard Output Control Signal: 0 ~ 10 VDC linear proportional output, maximum load driving current 80 mA for direct connection to electro-hydraulic servo actuator coil
• Built-in Speed Trim Adjustment Range: ±12% of rated nominal engine set speed via precision multi-turn potentiometer on PCB surface
• Operating Ambient Temperature: -25 ℃ ~ +70 ℃ continuous rated operation; certified storage temperature: -40 ℃ ~ +85 ℃
• Allowable Working Relative Humidity: 5% ~93% non-condensing environmental humidity
• Overall Physical Dimension: 220 mm (Length) ×115 mm (Width) ×28 mm (Board Thickness); net single unit weight 315 g
• Mounting Form: Standard Eurocard 3U rack card specification, compatible with 19-inch industrial control cabinet DIN rail rack slot
• Signal Bandwidth: Fixed closed-loop bandwidth 0.2 Hz ~ 3.2 Hz for engine governing loop stabilization

4. Functional Characteristics

1. Multi-stage operational amplifier cascade circuit realizes step-by-step magnification of low-amplitude speed pickup AC feedback signal, eliminates background high-frequency clutter noise via on-board RC low-pass filter network.
2. Embedded reference voltage benchmark circuit converts processed AC speed signal into proportional analog DC voltage to reflect real-time engine rotating speed value.
3. Onboard adjustable speed droop potentiometer sets permanent governing droop coefficient from 0% to 8% to stabilize engine speed under variable load fluctuation conditions.
4. Independent fault detection circuit monitors input signal loss and supply voltage out-of-tolerance status, pulls down auxiliary fault alarm output terminal when abnormal working state occurs for upper DCS system fault prompt.
5. Built-in temperature drift compensation passive component set restrains output zero drift induced by cabinet internal ambient temperature variation across full rated working temperature interval.
6. Standard gold-plated edge connector pinout design for direct plug-in docking with cabinet backplane bus without intermediate signal conversion wiring.
7. Matching external speed switch signal input terminal supports overspeed pre-warning signal access for early engine protection linkage logic.

5. Performance Parameters

• Full-scale linearity error of output signal: ≤±1.1%FS under standard 25℃ rated ambient environment
• Long-term zero drift value: ≤0.04 V/24H continuous powered operation under constant temperature clean environment
• EMC anti-interference performance: No output signal offset or distortion under 10V/m radiated RF electromagnetic field per IEC61000-6-2 standard
• Vibration resistance index: Pass 10Hz~150Hz 5g random vibration test without component desoldering and parameter deviation
• Certified design service life: Minimum rated MTBF 320000 operating hours under normal industrial rated operating condition
• Overspeed response delay: ≤28ms from abnormal speed rise to corresponding control output variation
• Load regulation accuracy: ≤±0.7% rated output voltage fluctuation with full-range actuator load change

6. Material Composition

1. Base Circuit Substrate: High-Tg FR4 epoxy glass fiber copper clad laminate, UL94-V0 flame retardant grade substrate material
2. Surface Copper Conductor Layer: Electrodeposited rolled copper foil with 35μm standard thickness, immersion gold surface treatment for edge connector pins with gold plating thickness ≥0.035μm
3. Core Electronic Components: Military-grade low-temperature drift metal film fixed resistors, NPO temperature-stable ceramic chip capacitors, sealed epoxy encapsulated dual operational amplifier integrated chips
4. Adjustable Calibration Components: Multi-turn wire-wound precision potentiometer with stainless steel adjustment spindle and carbon resistance core
5. External Protective Auxiliary Parts: Black ABS plastic surface positioning label, silicone rubber shock-absorbing foot pad fixed on board corner
6. Internal Fixed Fasteners: SUS304 stainless steel miniature anti-rust screws for auxiliary component positioning fixation

7. Structural Features

1. Single-layer main PCB integral layout with zoning modular design divided into input signal conditioning zone, multi-stage amplification zone, reference voltage zone, output driving zone and fault signal auxiliary zone from left to right.
2. Bottom edge full-length gold-plated card edge connector arranged with standardized pin definition in fixed spacing, matching Rolls-Royce original cabinet backplane socket size specification.
3. Top surface reserved independent installation positioning holes at four corners for auxiliary fixing with cabinet inner rack bracket when required.
4. All adjustable trim potentiometers centralized arranged on upper right area of PCB for convenient on-site manual calibration operation without disassembly of outer cabinet.
5. Component spacing layout reserves natural air convection clearance between high-power heating components to avoid local over-temperature parameter drift.
6. Printed silkscreen marking on PCB surface clearly marks each terminal definition, component reference code and rated specification for field maintenance identification.

8. Working Principle

9. Advantage Highlights

1. Original Rolls-Royce factory calibrated finished governing amplifier with complete batch production test data traceability, direct interchangeable replacement with same-series PC model without on-site recalibration after field installation.
2. Integrated multi-functional circuit layout integrates signal filtering, amplification, speed trimming and fault detection inside single PCB to reduce external auxiliary wiring quantity and whole control cabinet failure points.
3. Wide rated operating temperature range adapts marine engine cabin and outdoor power station harsh high-low temperature working environment without extra constant-temperature auxiliary housing.
4. Standard 3U Eurocard unified mechanical dimension matches full range of Rolls-Royce original governing cabinet rack, compatible with legacy and new-built control system backplane bus.
5. Strict military-grade component selection realizes ultra-low temperature drift characteristic to guarantee long-term stable governing precision under variable on-site ambient conditions.
6. Global DNV marine safety and SIL1 functional safety certification supports offshore platform, shipboard and onshore industrial power generation project global deployment.

10. Applicable Industries

• Offshore Oil & Gas Industry: Offshore drilling platform onboard gas turbine prime mover speed governing control
• Marine Shipbuilding Industry: Merchant vessel main diesel engine and auxiliary generator set governing cabinet matching
• Thermal Power Generation Industry: Distributed gas-fired power plant heavy-duty gas turbine speed control system
• Petrochemical Processing Industry: Refinery standby emergency diesel generator automatic governing equipment
• Industrial Mining Industry: Large fixed diesel-driven compressor unit closed-loop speed regulation system
• Railway Power Equipment Industry: Locomotive auxiliary diesel generating set control cabinet core amplifier replacement

11. Applicable Model Series

• Same Product Line Peer Models: Rolls-Royce 5880-PC1017,5880-PC1020,5880-PC1026,5880-PC1030 governing amplifier PCB boards
• Matching Host Control Cabinet: Rolls-Royce PC series original engine governing rack cabinet and backplane bus assembly
• Matching Auxiliary Components: Magnetic speed pickup sensor, electro-hydraulic fuel actuator, cabinet 24VDC stabilized power supply module, shielded signal connecting cable

12. Installation Requirements

1. Complete plug-in installation operation under full power-off state of whole engine governing cabinet and matched prime mover equipment, insert PCB vertically into cabinet 19-inch rack slot along guide rail without forced skew extrusion of edge connector.
2. Confirm card edge connector fully inserted into backplane socket with complete contact after installation, fix four-corner positioning screws with tightening torque controlled at 0.7N·m to prevent board loose vibration during unit operation.
3. Reserve minimum 30mm vertical ventilation clearance above and below PCB installation position for natural heat dissipation, forbid closed full-sealed slot installation without air circulation space.
4. Complete all external signal wiring and power wiring per PCB silkscreen terminal definition; separate low-level speed signal shielded cable from high-current power cable with minimum 12cm wiring gap to eliminate power frequency interference.
5. Execute speed trim and droop coefficient calibration via surface potentiometer after cabinet power-on and preheat for 30 minutes before formal engine no-load commissioning test.
6. All signal wiring adopts double-layer shielded twisted wire with shield grounding at cabinet single grounding terminal to restrain external electromagnetic noise infiltration.

13. Usage Precautions

1. Strictly prohibit powered status manual disassembly of PCB and desoldering of on-board components; random component removal leads to permanent circuit parameter deviation and board scrap.
2. Prevent cabinet internal cooling water, lubricating oil and corrosive chemical vapor splashing onto PCB circuit surface and gold-plated edge connector; cut off cabinet main power immediately once liquid contamination occurs and replace spare amplifier card directly.
3. Forbid overvoltage input of ±24VDC power supply exceeding ±15% tolerance range; excess input voltage causes irreversible breakdown of on-board integrated amplifier chip.
4. Execute quarterly routine maintenance inspection: check connector contact tightness, PCB surface dust accumulation, output control voltage accuracy and fault alarm function; record all inspection data into equipment maintenance log archive.
5. Store unused spare amplifier card inside original factory anti-static sealed packaging bag under 18℃~26℃ dry indoor warehouse environment, forbid long-term storage under direct sunlight, damp high-humidity or freezing low-temperature ambient condition.
6. Avoid frequent repeated cabinet power-on/power-off operation; each full power-off interval shall exceed 20 minutes to prevent frequent thermal alternation inducing component solder joint fatigue and open-circuit failure.