Woodward 8280-4401 Large Engine Control Module (LECM)

For redundant operation, the control can use any combination of power supplies.

The power supplies can only be installed into slots PS1 (power supply #1) and PS2 (power supply #2).

If redundant power supplies are not needed, blanking plates must be installed in the slots not being used.

Branch circuit fuses, circuit breakers, and wiring must meet appropriate codes and authorities having

jurisdiction for the specific country (CE, UL, etc.). See Table 4-3 for maximum recommended fuse or

breaker ratings. Do not connect more than one main power supply to any one fuse or circuit breaker. Use

only the wire sizes specified in Table 4-3. which meet local code requirements. Time delay fuses or circuit

breakers must be used to prevent nuisance trips.

In the event that on supply needs to be replaced, the recommended method for changing

Power Modules is with the power off (to the module being removed and the module being inserted).

The system will tolerate this “cold swap” method without failure.

MicroNet TMR® (Triple Modular Redundancy) controllers are state-of-the-art digital control

platforms designed to reliably control and protect steam turbines, gas turbines and compressor packages.

These units are used in critical system applications where there is a risk of safety issues or significant economic loss.

The MicroNet TMR®'s "2-out-of-3" voting structure ensures that problems are responded to correctly

and that prime movers continue to operate safely with or without any single point of failure.

The controller's robustness, fault tolerance, accuracy and availability make it the first choice

for turbine and compressor OEMs and operators worldwide.

The superior architecture and diagnostic coverage of the MicroNet TMR® results in 99.999%

system availability and reliability.

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