3. Product Specification Manual

3.1 Basic Parameters

• Part Number: P0916AL

• Product Type: Low-Noise Precision AC-DC Redundant Rack Power Supply

• Manufacturer: Foxboro (AVEVA / Schneider Electric)

• Applicable System: I/A Series DCS Distributed Control System

• Core Function: Low-noise AC-DC conversion, ultra-stable 24VDC power supply, dual redundant backup for precision analog measurement racks

• Input Voltage: 100–240V AC universal wide-range mains

• Rated DC Output: Regulated 24VDC

• Max Output Power: 280W

• Protection Class: IP20

• Housing Material: Die-cast aluminum alloy reinforced heat sink

• Net Weight: 0.53kg

• Installation: Vertical slot mounting for standard 19-inch industrial control cabinet

• Compatible Hardware: Full P0914 series backplanes, P0914WP controllers, P0914YM/P0914YZ FCM communication modules, all FBM analog/digital I/O cards, P0915DX/P0915FB/P0915FC terminal bases

3.2 Key Electrical Performance

• Output Voltage Regulation: ±0.3% full-load static stability

• Output Ripple & Noise: ≤60mV peak-to-peak (ultra-low noise design for weak signal circuits)

• Redundancy Mode: Dual-module parallel hot standby with accurate automatic current sharing

• Fault Switching: Zero voltage sag seamless transfer during single module failure

• Anti-Interference Design: Active EMI filter + multi-stage LC passive filter to suppress switching noise and grid harmonic interference

• Cooling Method: Fanless passive natural convection, no vibration or fan noise interference

3.3 Maintenance & Diagnostic Functions

• Hot Swap Support: Online plug-and-play replacement without cutting off rack AC input

• Real-time On-board Self-Diagnosis: Monitor AC input loss, DC overload, output short-circuit, internal over-temperature and circuit failure

• LED Indicator Definition: Steady green = normal ultra-stable output; flashing red = power system fault alarm

• Redundancy Configuration: Direct parallel installation without extra software parameter setup

• Load Adaptation: Optimized for mixed heavy loads of precision temperature input, HART analog and digital interlock modules

3.4 Environmental Technical Index

• Operating Temperature: 0℃ ~ +60℃

• Storage Temperature: -40℃ ~ +85℃

• Relative Humidity: 5% ~ 95% non-condensing

• Dust Resistance: Conforms to ISA S71.04 Class G3 industrial dust environment standard

• Vibration Resistance: Pass IEC60068 industrial anti-vibration durability tests

• Industrial Certifications: CE, UL global industrial safety certification

3.5 Complete Built-in Safety Protection Circuits

1. Output overvoltage lockout protection: Instantly cut off 24VDC output to protect high-precision analog modules from voltage surges

2. Overcurrent & short-circuit fast current limiting protection for field signal loops

3. Progressive over-temperature derating + full shutdown protection at critical temperature threshold

4. Reverse AC input polarity protection to prevent module burnout caused by miswiring

5. Multi-level input surge absorption circuit to block lightning transient and grid voltage spikes

6. Internal noise suppression isolation barrier to avoid power noise coupling to backplane bus signals

3.6 Step-by-Step Installation Instructions

1. Vertically insert P0916AL low-noise power supply into dedicated power slot of P0914-series rack backplane inside standard 19-inch cabinet;

2. Run 100–240V AC mains cable to the rear input terminal block, fully tighten wiring terminals to eliminate loose contact noise;

3. Deploy dual P0916AL modules in adjacent power slots for redundant power backup architecture;

4. Confirm all precision analog I/O modules and communication cards are fully locked into backplane slots;

5. Switch on AC mains supply, observe front LED: steady green light indicates ultra-low-noise stable 24VDC power supply for the entire rack;

6. Maintenance operation: Hot-swap faulty P0916AL module directly without rack power cut, standby unit continuously supplies power to avoid interruption of precision measurement loops.

4. Application Fields

1. Petrochemical refining plants (reactor temperature, distillation tower precision pressure & flow monitoring)

2. Fine chemical, pharmaceutical and laboratory pilot production lines requiring micro-accurate temperature control

3. Thermal power boiler and turbine precision parameter measurement control cabinets

4. Metallurgical heat treatment furnaces with high-precision thermocouple/RTD temperature acquisition

5. Food, beverage and pharmaceutical sterile production constant temperature control workshops

6. Pulp and paper high-precision drying temperature & pressure closed-loop control systems

7. Environmental protection waste gas flue gas precision continuous monitoring stations

8. Meter calibration laboratories and industrial precision measurement control rooms

Information Verification Note

• Confirmed fixed facts: P0916AL is low-noise AC-input 280W redundant power supply for I/A Series DCS, ultra-low ripple output optimized for precision analog signal modules, fanless cooling, hot swappable, dual parallel load sharing, full P0914 series hardware compatibility, ISA G3 dust resistant; differentiated by ultra-low noise design versus standard P0916AA/AC/AE AC power modules.

• Unverified content: Original factory complete electrical noise test datasheet, customized explosion-proof variants, special low-temperature industrial versions, which need cross-verification via official Foxboro hardware manual.