Product Overview

• Part Number: SPAD346C3
• Brand: ABB Bailey
• Matching System: Symphony / INFI 90 classic DCS
• Type: Rack-mounted analog signal input acquisition module

• FunctionCollect analog signals from field transmitters for temperature, pressure, flow, liquid level. Convert field current/voltage signals into digital data and transmit to DCS controller via backplane bus. Support real-time monitoring, closed-loop regulation, alarm interlock and trend recording for boilers, turbines and chemical pipelines.

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Core Features

• Multiple configurable input channels, compatible with 4-20mA, 0-20mA, 0-5V, 0-10V standard industrial signals
• Channel-level signal filtering and isolation, strong anti-interference for high-electromagnetic-interference power plant environments
• Conformal coated PCB, dustproof, moisture-proof and anti-corrosion for long-term stable operation
• Front LED indicators for power, operation and channel faults for rapid on-site troubleshooting
• Standard Symphony rack plug-in design, supports hot swap, convenient cabinet maintenance without system shutdown

• Calibration function for zero/span correction to guarantee long-term measurement accuracy

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Technical Specifications

• Power Supply: DC 24V backplane power supply
• Operating Temperature: 0℃ ~ +60℃
• Storage Temperature: -40℃ ~ +85℃
• Humidity: 5%~95% non-condensing
• Protection Grade: IP20 (cabinet internal installation only)
• HS Code: 85389091

• Supply: Brand new original, new old stock and fully tested refurbished modules available

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Compatibility

• Fully compatible with all Symphony, INFI90 DCS controller racks
• Matched equipment: pressure/temperature/flow transmitters, differential pressure sensors
• Widely used in thermal power, hydropower, petrochemical, pulp and paper automation cabinets

• Direct one-to-one replacement for all batches of SPAD346C3

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Application

• Replacement for faulty AI cards with drifting readings and unstable signal acquisition
• Signal collection overhaul for boiler, turbine, reactor and pipeline closed-loop control cabinets
• I/O expansion and upgrade of old Symphony DCS systems
• Long-term spare backup for power plant and chemical process control DCS racks