Product Overview

• Part Number: GFD212A, full part code 3BHE020356R0101
• Brand: ABB
• Matching System: Symphony Plus, INFI90 classic DCS system
• Type: 12-channel relay digital output module

• FunctionReceives logic commands from DCS main controller, outputs switch signals via built-in relays. It drives solenoid valves, AC contactors, indicator lights, alarm buzzers and local interlock equipment on site. It executes opening/closing actions of boiler burners, water pumps, fans and pipeline valves, supporting equipment interlock protection and onsite status indication.

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Core Features

1. 12 independent relay output channels, AgSnO₂ relay contacts, anti-contact adhesion, stable for frequent on-off of inductive loads
2. Each relay supports 8A resistive load under 250VAC; compatible with most low-power field execution devices
3. 4kV AC reinforced isolation between field loop and control bus, strong anti-electromagnetic interference for power plant and chemical cabinets
4. PCB conformal coating, dust-proof, moisture-proof and oil mist resistant, adapts high-temperature and vibration workshop environment
5. Independent LED indicator per channel, plus power and module fault lamps for fast channel fault positioning

6. Standard Symphony rack card structure, hot swappable; no system shutdown required for cabinet maintenance

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Technical Specifications

• Power Supply: DC 24V ±10%
• Channel Quantity: 12 relay DO channels
• Single-channel rated load: 8A/250VAC resistive load
• Response time: ≤10ms
• Operating Temperature: -25℃ ~ +60℃
• Storage Temperature: -40℃ ~ +85℃
• Humidity: 5%~95% non-condensing
• Protection Grade: IP20 (cabinet internal installation only)
• Net Weight: 0.48kg
• HS Code: 85389091

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

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Compatibility

• Matched rack: Symphony Plus HR rack, INFI90 system backplane
• Matched controllers: Symphony series DCS main controllers
• Applicable equipment: Burner valves, cooling fans, feed pumps, alarm lamps, magnetic contactors
• Applicable industries: thermal power, hydropower, petrochemical, papermaking, water treatment

• Direct one-to-one replacement only for GFD212A (3BHE020356R0101)

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Application

• Replacement maintenance for failed relay channels, output no action or intermittent actuation
• Expansion of digital output points for old power plant boiler and turbine DCS cabinets
• Retrofit overhaul of burner safety interlock, pump fan control circuits
• Long-term spare backup for Symphony DCS process control cabinets