Woodward 5466-425 Controller (MicroNet TMR Series)
5466-425 is a triple redundant (TMR) PAC controller under the Woodward MicroNet TMR platform, which focuses on safety critical control of power generation/oil and gas/large rotating machinery, with SIL3 safety level. It is commonly used for control and protection of gas turbines, steam turbines, compressors, and generator sets.

1、 Model and positioning
Model: 5466-425
Brand/Series: Woodward (USA), MicroNet TMR (Triple Modular Redundancy)
Positioning: High end safety type controller (TMR), used for safety critical+high reliability continuous control scenarios
Typical substitutions/associations: Same series 5466-253, 5466-1115; Matching Woodward with 5501 series I/O cards
2、 Core hardware and performance
1. Processor and redundancy
Architecture: TMR triple redundancy (three channel synchronization, 2oo3 voting)
CPU: Multi core processor, clock speed ≥ 1.5GHz
Safety level: IEC 61508 SIL 3
Scanning cycle: minimum * * ≤ 10ms * * (deterministic real-time control)
Memory: ≥ 4GB RAM; ≥ 64GB non-volatile storage
2. Electrical and Environmental
Power supply: 24VDC (18-32V), dual redundant power supply
Power consumption: ≤ 25W
Temperature: -20 ℃~+60 ℃ (industrial grade)
Protection: IP20, anti vibration/anti electromagnetic interference
3. I/O and Communication
Integrated I/O: 16 analog inputs (0-5V/4-20mA, isolated); Scalable to 32DI/16AI
Communication interface:
4 x Gigabit Ethernet (supporting ring network redundancy)
2×USB 3.0
2×RS‑485
Supported protocols: PROFINET IRT, EtherNet/IP, Modbus TCP/RTU, OPC UA
3、 Key functions
TMR triple redundancy: Three channels operate independently, and a single point of failure does not affect control; Online hot swappable module replacement
Unit control: speed/load/temperature/pressure closed-loop control of gas/steam turbines, compressors, and generators
Safety protection: SIL3 level interlocking protection for overspeed, overtemperature, overpressure, vibration exceeding limits, etc
Advanced algorithms: PID, feedforward, cascade, sequential control, batch control, SOE event recording
Network and diagnosis: redundant Ethernet, remote diagnosis, fault self detection, LED status indication
4、 Typical applications
Power generation: gas turbine/steam turbine generator sets, combined cycle power plants
Oil and gas: compressor stations, pipeline transportation, oilfield power equipment
Industrial Drive: Control and Protection of Large Motors, Fans, and Pump Sets
Ship: Main propulsion system, power station control
5、 Difference from your previous ABB module
ABB HC800/CP800/PM510V08: DCS process controller (power plant/chemical process), no TMR, no SIL3
Woodward 5466-425: TMR safety controller (turbine/unit control), SIL3、 Triple redundancy, focusing on the protection and control of rotating machinery